阅读说明：本技术 一种地铁道岔区整体道床沉降整治方法 (Subway turnout area integral ballast bed settlement renovation method ) 是由 王森荣 张政 任西冲 宋文祥 李秋义 孙立 杨艳丽 张世杰 唐长根 于 2020-12-10 设计创作，主要内容包括：一种地铁道岔区整体道床沉降整治方法,包括实时监测沉降区域和其相邻一定长度范围内的道床沉降情况；设置沉降阈值,当道床沉降量超过某个值时,自动实时监测预警,并在道床沉降尚未稳定时进行道床沉降的临时调整和临时加固；待道床沉降稳定,采用永久整治修复技术,对沉降稳定后道岔整体道床进行综合整治。本发明对沉降期间道岔的几何形位进行临时调整,使道岔几何形位满足安全行车要求；通过轨距拉杆钢架和钢制托梁临时加固措施,强化轨距保持能力和道床的整体性；针对沉降稳定后道床的不同情况,分注浆修复技术、机械抬升+注浆修复技术、凿除岔枕重新浇筑混凝土平台的永久整治修复技术,对沉降稳定后道岔整体道床进行综合整治。(A subway turnout area integral track bed settlement renovation method comprises the steps of monitoring settlement conditions of a settlement area and a track bed in a certain length range adjacent to the settlement area in real time; setting a settlement threshold value, automatically monitoring and early warning in real time when the settlement of the track bed exceeds a certain value, and temporarily adjusting and temporarily reinforcing the settlement of the track bed when the settlement of the track bed is not stable; and after the ballast bed is settled stably, the permanent renovation and restoration technology is adopted to comprehensively renovate the whole ballast bed of the turnout after the settlement is stable. The invention temporarily adjusts the geometric shape and position of the turnout during the settlement period, so that the geometric shape and position of the turnout meets the requirement of safe driving; the track gauge holding capacity and the integrity of the track bed are strengthened by temporary reinforcement measures of the track gauge pull rod steel frame and the steel joist; aiming at different conditions of the ballast bed after the settlement is stable, a separate grouting repairing technology, a mechanical lifting and grouting repairing technology and a permanent repairing technology for chiseling the turnout sleeper and pouring the concrete platform again are adopted to comprehensively repair the turnout integral ballast bed after the settlement is stable.)

1. The method for treating the settlement of the integral track bed in the subway turnout area is characterized by comprising the following steps

Step 1, monitoring the settlement condition of a settlement area and a ballast bed in a certain adjacent length range in real time;

step 2, setting a settlement threshold, realizing automatic real-time monitoring and early warning when the settlement of the ballast bed exceeds a certain value, and temporarily adjusting and temporarily reinforcing the settlement of the ballast bed when the settlement of the ballast bed is not stable;

and 3, after the temporary adjustment and the temporary reinforcement, after the ballast bed is settled stably, performing comprehensive remediation on the whole turnout ballast bed after the settlement is stable by adopting a permanent remediation and repair technology.

2. The method for treating the settlement of the integral track bed in the subway turnout zone according to claim 1, wherein in the step 2, the temporary adjustment of the settlement of the track bed is specifically as follows: increase the thickening iron plate of buckling in the fastener of subway switch, the thickening iron plate of buckling is installed on subsiding original standard iron tie plate in unusual section subway switch fastener, heightens the fastener height through the thickening iron plate of buckling to increase fastener anchor bolt quantity, will buckle on thickening iron plate is fixed in the switch tie through a plurality of fastener anchor bolts, with the additional atress that the sharing fastener was heightened and is brought.

3. The method according to claim 2, wherein the bent and thickened iron plate comprises a boss and side plates located on both sides of the boss and integrally formed with the boss, the steel rail at the abnormal section of the settlement is supported on the boss, an original standard iron tie plate in the fastener is located below the boss, a plurality of first screw holes are formed in the side plates and the standard iron tie plate at the relative positions, and the side plates and the standard iron tie plate are fixed on the switch tie through a plurality of first fastener anchor bolts matched with the first screw holes, a plurality of second screw holes are formed in the boss and the standard iron tie plate at the relative positions, and the side plates and the standard iron tie plate are fixed on the switch tie through a plurality of second fastener anchor bolts matched with the second screw holes.

4. The method for treating the settlement of the integral track bed in the subway turnout area according to claim 2, wherein in the step 2, the temporary reinforcement of the settlement of the track bed is specifically: the rail gauge pull rod steel frame is used for fixing the rails, the rail gauge pull rod steel frame is provided with two rail mounting positions, and two rails of the subway turnout at the abnormal settlement section are respectively mounted on the two rail mounting positions of the rail gauge pull rod steel frame, so that the rail gauge is kept unchanged.

5. The method for settling the monolithic track bed in the subway turnout zone according to claim 4, wherein the gauge tie steel frame comprises two i-beams and a gauge tie, the two i-beams are respectively arranged on two sides of the rail along the length direction of the rail at the abnormal settling section, two ends of the gauge tie are respectively connected to the two i-beams, the gauge tie is provided with a plurality of gauge ties, the gauge ties are arranged at intervals along the length direction of the rail at the abnormal settling section, two concave grooves are fixedly arranged on the gauge tie to serve as rail mounting positions, the two rails are respectively embedded into the two concave grooves of the gauge tie, and the gauge of the two rails is kept unchanged by respectively fixing the two rails through the two concave grooves.

6. The method for treating the settlement of the integral track bed in the subway turnout area according to claim 5, wherein in the step 2, the temporary reinforcement of the settlement of the track bed is specifically: the steel joist is arranged on the outer side of the abnormal settlement section line steel rail and arranged along the length direction of the abnormal settlement section line steel rail, and the steel joist is fixedly connected with a plurality of switch sleepers of the abnormal settlement section.

7. The method for settling and renovating the integral ballast bed in the subway turnout zone according to claim 1, wherein in the step 3, the permanent renovation technology is a grouting renovation technology, a renovation technology combining mechanical lifting and grouting renovation or a technology of removing a turnout sleeper and pouring a concrete platform again.

8. The method for settling and renovating the integral track bed of the subway turnout zone according to claim 1, wherein the step 3 is specifically as follows: whether the condition of coming to nothing exists between track bed and the civil engineering structure in switch district is examined in the adoption water drilling method sample, if have, then adopts the permanent improvement track bed of slip casting restoration technique to subside, and this restoration technique specifically includes following step:

step 311, surveying the settlement condition of the ballast bed on the site, installing elevation measurement equipment, measuring the elevation of the ballastless track structure of the settlement area, making a specific lifting scheme according to the measurement result and engineering requirements, and establishing a lifting point monitoring network;

step 312, sealing and grouting the longitudinal and transverse cracks of the ballast bed, the soil cracks between the ditch and the ballast bed, the water seepage positions of the expansion joints of the ballast bed and the damaged positions in the ditch;

313, marking the position of the grouting hole according to a set lifting scheme, then drilling, timely cleaning dust on site during drilling, and plugging the grouting hole by using a plugging piece;

step 314, removing a plugging piece at the upper part of the grouting hole, injecting grouting materials into a lower part structure of the ballastless track from a grouting pipe according to set grouting lifting technological parameters and a grouting process, lifting the track structure, and monitoring the elevation of the track structure in real time by installed elevation monitoring equipment in the lifting process;

315, strictly controlling grouting pressure in the grouting lifting process to avoid the inverted arch of the track bed after grouting; the grouting sequence is that firstly, the middle lifting hole is grouted, and then the filling holes at the two sides and the middle filling hole are grouted in sequence; grouting lifting holes in sequence from the lowest elevation point of the track structure; stopping grouting immediately after the track structure is lifted to the height set by the grouting lifting at this time; after the lifting hole grouting is finished, grouting is carried out on the filling holes in the middle and at two sides of the line so as to ensure that grouting materials are uniformly and densely filled at the lower part of the track structure;

and step 316, if the single lifting height does not reach the set lifting height, repeating the step D, E, and finally lifting the track bed to a proper position through multiple times of lifting.

9. The method for renovating the settlement of the integral track bed in the subway turnout zone according to claim 1, wherein a water drilling method is adopted to sample and check whether the condition of the gap between the track bed in the turnout zone and the civil engineering structure exists, if the phenomenon of the gap does not exist, the restoration technology combining mechanical lifting and grouting restoration is adopted to permanently renovate the settlement of the track bed, and the restoration technology comprises the following steps:

step 321, investigating the general situation of the abnormal region of the track bed settlement, and determining the length of the abnormal region of the track bed settlement;

step 322, removing the fasteners and the steel rails within the abnormal length range of settlement;

step 323, mounting anchoring parts on the turnout zone track bed by planting bars, continuously mounting a certain number of jacks on two sides of the track bed bottom plate of the abnormal settlement section, and debugging the jacks;

324, placing the distribution beam on the adjusted jack across the rail;

step 325, connecting and fixing the suspender and the distribution beam, and then jacking the distribution beam by using a jack to realize the lifting of the track;

and 326, after the jacking height meets the requirement, grouting materials are poured into a gap formed between the lifted ballast bed and the structural bottom plate, and the settlement of the ballast bed is permanently remedied through a grouting repair technology.

10. The method for remedying the settlement of the integral track bed in the subway turnout zone according to claim 1, wherein the method comprises the steps of adopting a water drilling method to sample and check whether the condition of the turnout zone track bed and a civil engineering structure is empty, and adopting a turnout sleeper chiseling and concreting platform remediation technology to permanently remediate the settlement of the track bed if the condition of the empty situation does not exist and the quantity of field jacking equipment, the installation space or the construction time is insufficient, wherein the remediation technology specifically comprises the following steps:

step 331, measuring the ballastless track structure elevation of the settlement area, determining turnout sleepers to be chiseled according to the settlement monitoring result, and marking on site;

step 332, removing the fasteners above the marked switch tie;

333, chiseling the marked switch tie and the concrete in a certain range around the marked switch tie, wherein the width and the length of a chiseled pit are the same as those of the bottom of the original switch tie, the depth of the chiseling pit is equal to the bottom surface of the switch tie, and connecting steel bars of the original switch tie around the pit, which extend into a track bed, are reserved;

step 334, cleaning the foundation pit and the surface of the track bed slab after the turnout sleeper is chiseled;

step 335, temporarily supporting the bed surfaces on the two sides of the chiseled turnout sleeper by using square timber;

336, connecting the newly laid steel bars in the pits with the connecting steel bars which originally extend into the roadbed and are positioned around the pits in a welding anchoring mode, implanting the steel bars into the bottoms of the pits through drilling holes, binding the steel bars to form a steel bar cage, and coating interface agents on the periphery of the steel bar cage to strengthen the binding effect of new and old concrete;

337, reinstalling the fastener and the plastic sleeve of the original switch tie with the switch tie chiseled, adjusting the combination shape and position of the track, installing a template around the fastener, and pouring concrete;

338, after the concrete is cured to reach a certain strength, removing the template and the fastener to suspend the steel rail in the air, so as to prevent the newly poured concrete platform from being damaged due to premature stress;

and 339, pouring concrete again, reinstalling a fastener after the newly poured concrete meets the bearing requirement, removing the square timber, retesting the geometric shape and position of the line, and recovering the normal operation of the line.

Technical Field

The invention relates to the field of rail transit, in particular to a method for treating settlement of an integral track bed in a subway turnout area.

Background

The subway tunnel integral track bed has the advantages of stable operation, uniform rigidity, strong durability, small maintenance engineering amount and the like, and is widely applied to urban rail transit in China. The operation shows that the overall condition of the subway track bed is good, but due to the influences of complex geological conditions of some lines, poor quality control in the construction process, cross engineering construction, underground water and the like, the overall track bed of local sections of partial lines has settlement of different degrees, and the settlement disease of the subway track bed occurs. The sinking of the ballast bed can affect the smooth running of the train and endanger the driving safety in serious cases. The turnout is used as a weak link of a line, the problems of uneven rigidity, harmful space and the like exist, the requirement on the smoothness of the line is high, in addition, the structure of the turnout area is complex, the types of pipelines and equipment are more, the comfort and the safety of driving can be seriously influenced by the settlement of the integral track bed of the turnout area, the operation speed of a train and the traffic capacity of a railway are reduced, and the turnout is one of important hidden troubles of subway safe operation.

The traditional method for treating the sinking of the whole track bed can be mainly divided into two categories, the first category is to interrupt traffic and integrally repair the track bed in a damaged area, and the second category is to adopt a series of measures such as adjusting fasteners or increasing the adjustable amount of the fasteners or pouring cement slurry and the like on a substrate to treat and lift the whole track bed or a steel rail on the premise of ensuring traffic, but the two categories have certain defects.

The method for integrally repairing the ballast bed generally has a long construction period, which causes the interruption of train operation, and has too high maintenance cost, huge construction machinery, more operating personnel and no contribution to field organization and management; the ventilation is poor when the long and large tunnel is constructed, the operation of large-scale operation machinery generates serious harmful gas, dust and noise, the construction operation environment pollution is caused, and simultaneously, a large amount of tunnel waste is generated, so the ventilation can not be adopted under the general condition.

At present, on the premise of not interrupting the vehicle, two maintenance methods are mainly adopted: one approach is to increase the fastener adjustability, such as by thickening the underlayment or thickening the iron tie plate, which to some extent restores the ride characteristics of the track structure. Under general conditions, switch district fastener is from taking the height-adjusting function, and adjustable about +20mm is realized through the height-adjusting backing plate of plugging up different specifications under fastener iron tie plate. The adjustment is carried out by adopting a mode of thickening a cushion layer, the cushion layer of the fastener needs to adopt an integral cushion layer to maintain the stability of the track structure, the cushion layer can be led to shift out by adopting a layered cushion plate, and the track stability is poor; because the settlement amount of different places is different, the thickness of the whole cushion layer used by each fastener is different, different whole base plates are manufactured by independently opening the die, the cost is high, and the requirement on site construction is high; in addition, the fastener can be adjusted by thickening the cushion layer, the amplitude is limited, and the processing mode has great limitation on the track structure which sinks continuously for a long time along with the operation time. Surpass design and adjust the volume after, the specially-made thickening iron tie plate of accessible realizes, just thickens to 30mm or bigger for example when making by 20mm the iron tie plate thickness of former design to further improve fastener volume of adjusting, nevertheless thickening iron tie plate can lead to bolt length to increase, and the bolt appears the shearing easily and destroys, and track structural stability is relatively poor. In addition, the method is adopted for renovation, the height of the fastener is increased to a certain degree, the stability of the steel rail is influenced, and the problems of dynamic expansion of the rail gauge, breakage of elastic strips and the like are possible to occur, so that the operation safety of the train is influenced.

Another more common method is to use improved cement-based materials for grouting and grouting remediation, which relies on the fluidity of the grout itself to fill and reinforce the entire ballast bed and tunnel bottom and the crushed area at the tunnel bottom. The main problems existing in the field construction by adopting a grouting method at present are that most of the disease improvement construction belongs to skylight point construction, the skylight point construction time is short, and due to the influence of the safety construction control of the existing railway ballast bed, the requirements on grouting pressure, grout characteristics and the like are high, and the aims of not only realizing compact filling but also controlling the over-high grouting pressure are required to be achieved so as to avoid influencing the line shape of the railway and the safety of the railway ballast bed; the good fluidity of the slurry is ensured, and high requirements on the early setting time, the strength and the durability of the slurry are required, so that the requirements on related matched processes, tools and the like in the operation process of the common grouting method are high; under the premise of short time and high standard, the method puts forward high requirements on disease improvement construction, so that measures are required to be taken at the early stage of the disease improvement construction, the diseases are ensured and controlled not to be developed continuously, and necessary time and space are provided for the subsequent grouting reinforcement process. The quality of later stage grouting reinforcement construction is another important link for ensuring the overall construction effect, and the two need to be coordinated and unified to produce a good effect.

At present, the invention is applied for the rapid repair technology of ballastless track structure track bed settlement diseases in China, and the invention CN102018001427424 discloses a ballastless track settlement treatment method based on rope saw cutting; the invention CN2013100277170 discloses a system and a method for lifting the sinking of a railway ballastless track bed by applying an injection method, and mainly provides a lifting method and a grouting sequence of a ballastless track structure; the invention discloses a grouting lifting rapid repairing technology for a settled ballastless track, and mainly provides a key construction parameter and lifting precision control technology during grouting construction. The invention CN102014000394604 discloses a method for lifting and repairing a ballastless track for curve section settlement, which is suitable for curve sections by further improving a grouting technology. The invention CN201510525458 discloses an integral ballast bed and tunnel bottom defect treatment method based on combined support and grouting templates, which adopts a combined steel plate and grouting mode to treat ballast bed settlement.

In order to remedy the ballast bed settlement diseases, the prior invention mainly applies related inventions from various angles of a grouting method, but has certain defects, for example, common grouting construction is carried out in a ditch and a side ditch, and a section where the ballast bed settlement directly influences the irregularity of the steel rail lacks of a targeted measure, also lacks of a temporary reinforcement transition treatment measure aiming at different conditions, and has a single remediation method. In general, differential settlement occurs on civil foundation of a turnout area to drive a track structure of the turnout area to deform, the geometrical shape and position of the track caused by the settlement of the civil structure change, the civil structure must be rectified firstly, and the final rectification of the track structure is performed after the deformation and convergence of the civil structure, for example, a grouting method is adopted for processing, but the rectification technology of the invention usually needs to process after the settlement of the lower foundation is stable; however, in the actual situation on site, during or after the civil structure is renovated, for some sections, the settlement of the lower foundation is not stable yet or the situation that the geometric configuration of the track in the turnout area is out of limit in the settlement process continues to exist, the track structure cannot be subjected to final renovation measures, but the safety of the travelling crane is greatly influenced, so that some temporary reinforcement transition measures are required to control the geometric configuration of the track structure, and the safety of the travelling crane is ensured.

Therefore, it is necessary to invent a method for settling and renovating the whole track bed in the subway turnout area to solve the above problems.

Disclosure of Invention

In view of the technical defects and technical drawbacks in the prior art, embodiments of the present invention provide a method for treating the settlement of the whole track bed in the subway turnout zone, which overcomes or at least partially solves the above problems, and the specific scheme is as follows:

a settlement method for the whole track bed in the switch area of subway includes

Step 1, monitoring the settlement condition of a settlement area and a ballast bed in a certain adjacent length range in real time;

step 2, setting a settlement threshold, realizing automatic real-time monitoring and early warning when the settlement of the ballast bed exceeds a certain value, and temporarily adjusting and temporarily reinforcing the settlement of the ballast bed when the settlement of the ballast bed is not stable;

and 3, after the temporary adjustment and the temporary reinforcement, after the ballast bed is settled stably, performing comprehensive remediation on the whole turnout ballast bed after the settlement is stable by adopting a permanent remediation and repair technology.

Further, in step 2, the temporary adjustment of the ballast bed settlement specifically includes: increase the thickening iron plate of buckling in the fastener of subway switch, the thickening iron plate of buckling is installed on subsiding original standard iron tie plate in unusual section subway switch fastener, heightens the fastener height through the thickening iron plate of buckling to increase fastener anchor bolt quantity, will buckle on thickening iron plate is fixed in the switch tie through a plurality of fastener anchor bolts, with the additional atress that the sharing fastener was heightened and is brought.

Further, buckle thickening iron plate include the bellying with be located the bellying both sides with the integrative curb plate that takes shape of bellying, subside the rail of unusual section support in on the bellying, original standard iron tie plate in the fastener is located the bellying below, a plurality of first screws have all been seted up to the relative position on curb plate and the standard iron tie plate, and through a plurality of with first fastener anchor bolt that first screw matches is fixed in on the switch pillow, a plurality of second screws have all been seted up to the relative position on bellying and the standard iron tie plate, and through a plurality of with second fastener anchor bolt that the second screw matches is fixed in on the switch pillow.

Further, in the step 2, the temporary reinforcement of the ballast bed settlement is specifically: the rail gauge pull rod steel frame is used for fixing the rails, the rail gauge pull rod steel frame is provided with two rail mounting positions, and two rails of the subway turnout at the abnormal settlement section are respectively mounted on the two rail mounting positions of the rail gauge pull rod steel frame, so that the rail gauge is kept unchanged.

Furthermore, the gauge pull rod steel frame comprises two I-shaped steel beams and a gauge pull rod, the two I-shaped steel beams are respectively arranged on two sides of the steel rail along the length direction of the steel rail at the abnormal settlement section, two ends of the gauge pull rod are respectively connected to the two I-shaped steel beams, the gauge pull rods are multiple, the multiple gauge pull rods are arranged at intervals along the length direction of the steel rail at the abnormal settlement section, two concave grooves are fixedly arranged on the gauge pull rod and serve as steel rail mounting positions, the two steel rails are respectively embedded into the two concave grooves of the gauge pull rod, and the two steel rails are respectively fixed through the two concave grooves, so that the gauge of the two steel rails is kept unchanged.

Further, in the step 2, the temporary reinforcement of the ballast bed settlement is specifically: the steel joist is arranged on the outer side of the abnormal settlement section line steel rail and arranged along the length direction of the abnormal settlement section line steel rail, and the steel joist is fixedly connected with a plurality of switch sleepers of the abnormal settlement section.

Further, in step 3, the permanent renovation and restoration technology is a grouting restoration technology, a restoration technology combining mechanical lifting and grouting restoration, or a technology for removing a switch tie and pouring a concrete platform again.

Further, step 3 specifically comprises: whether the condition of coming to nothing exists between track bed and the civil engineering structure in switch district is examined in the adoption water drilling method sample, if have, then adopts the permanent improvement track bed of slip casting restoration technique to subside, and this restoration technique specifically includes following step:

step 311, surveying the settlement condition of the ballast bed on the site, installing elevation measurement equipment, measuring the elevation of the ballastless track structure of the settlement area, making a specific lifting scheme according to the measurement result and engineering requirements, and establishing a lifting point monitoring network;

step 312, sealing and grouting the longitudinal and transverse cracks of the ballast bed, the soil cracks between the ditch and the ballast bed, the water seepage positions of the expansion joints of the ballast bed and the damaged positions in the ditch;

313, marking the position of the grouting hole according to a set lifting scheme, then drilling, timely cleaning dust on site during drilling, and plugging the grouting hole by using a plugging piece;

step 314, removing a plugging piece at the upper part of the grouting hole, injecting grouting materials into a lower part structure of the ballastless track from a grouting pipe according to set grouting lifting technological parameters and a grouting process, lifting the track structure, and monitoring the elevation of the track structure in real time by installed elevation monitoring equipment in the lifting process;

315, strictly controlling grouting pressure in the grouting lifting process to avoid the inverted arch of the track bed after grouting; the grouting sequence is that firstly, the middle lifting hole is grouted, and then the filling holes at the two sides and the middle filling hole are grouted in sequence; grouting lifting holes in sequence from the lowest elevation point of the track structure; stopping grouting immediately after the track structure is lifted to the height set by the grouting lifting at this time; after the lifting hole grouting is finished, grouting is carried out on the filling holes in the middle and at two sides of the line so as to ensure that grouting materials are uniformly and densely filled at the lower part of the track structure;

and step 316, if the single lifting height does not reach the set lifting height, repeating the step D, E, and finally lifting the track bed to a proper position through multiple times of lifting.

Further, step 3 specifically is to adopt the water drilling method to sample and check whether the condition of coming to nothing exists between switch district roadbed and the civil engineering structure, if do not have the phenomenon of coming to nothing, adopt the restoration technique that machinery lifting + slip casting restoration combined together to permanently remedy the roadbed and subside, and this restoration technique specifically includes the following steps:

step 321, investigating the general situation of the abnormal region of the track bed settlement, and determining the length of the abnormal region of the track bed settlement;

step 322, removing the fasteners and the steel rails within the abnormal length range of settlement;

step 323, mounting anchoring parts on the turnout zone track bed by planting bars, continuously mounting a certain number of jacks on two sides of the track bed bottom plate of the abnormal settlement section, and debugging the jacks;

324, placing the distribution beam on the adjusted jack across the rail;

step 325, connecting and fixing the suspender and the distribution beam, and then jacking the distribution beam by using a jack to realize the lifting of the track;

and 326, after the jacking height meets the requirement, grouting materials are poured into a gap formed between the lifted ballast bed and the structural bottom plate, and the settlement of the ballast bed is permanently remedied through a grouting repair technology.

Further, step 3 specifically is, whether the condition of coming to the air between switch district railway roadbed and the civil engineering structure exists is examined in sample to adopt the water drilling method, if do not have the phenomenon of coming to the air, and when on-the-spot jacking equipment quantity, installation space are limited or construction time is insufficient, adopt and chisel out the switch pillow and pour concrete platform restoration technique permanent improvement railway roadbed settlement again, and this restoration technique specifically includes following step:

step 331, measuring the ballastless track structure elevation of the settlement area, determining a turnout sleeper to be chiseled in a 'three-by-one' mode according to the settlement monitoring result, and marking on site;

step 332, removing the fasteners above the marked switch tie;

333, chiseling the marked switch tie and the concrete in a certain range around the marked switch tie, wherein the width and the length of a chiseled pit are the same as those of the bottom of the original switch tie, the depth of the chiseling pit is equal to the bottom surface of the switch tie, and connecting steel bars of the original switch tie around the pit, which extend into a track bed, are reserved;

step 334, cleaning the foundation pit and the surface of the track bed slab after the turnout sleeper is chiseled;

step 335, temporarily supporting the bed surfaces on the two sides of the chiseled turnout sleeper by using square timber;

336, connecting the newly laid steel bars in the pits with the connecting steel bars which originally extend into the roadbed and are positioned around the pits in a welding anchoring mode, implanting the steel bars into the bottoms of the pits through drilling holes, binding the steel bars to form a steel bar cage, and coating interface agents on the periphery of the steel bar cage to strengthen the binding effect of new and old concrete;

337, reinstalling the fastener and the plastic sleeve of the original switch tie with the switch tie chiseled, adjusting the combination shape and position of the track, installing a template around the fastener, and pouring concrete;

338, after the concrete is cured to reach a certain strength, removing the template and the fastener to suspend the steel rail in the air, so as to prevent the newly poured concrete platform from being damaged due to premature stress;

and 339, pouring concrete again, reinstalling a fastener after the newly poured concrete meets the bearing requirement, removing the square timber, retesting the geometric shape and position of the line, and recovering the normal operation of the line.

The invention has the following beneficial effects:

1. the invention provides a method for regulating settlement of an integral track bed in a subway turnout area, which adopts a temporary regulating measure of a specially-made bent iron base plate height regulating fastener aiming at the unstable settlement period of the track bed in the turnout area, and ensures that the geometric shape and position of a line meet the requirement of safe driving during the settlement period of the track bed. By adopting the adjusting method and the tool for the bent iron base plate, the number of the anchor bolts at the positions of the fasteners can be increased, the additional stress caused by the height adjustment of the fasteners is shared, the original fasteners are stabilized, and the problems of unfavorable stress of the anchor bolts, shearing damage, dynamic expansion of the track gauge, breakage of elastic strips and the like caused by the corresponding lengthening of the bolts after the height adjustment of the fasteners are solved.

On the basis of adopting the temporary adjustment measure, adopt simultaneously to add the temporary reinforcement measure who establishes gauge pull rod steelframe and steel joist, strengthen gauge holding capacity and the overall stability of circuit, avoided the track bed to threaten driving safety to the deterioration of track bed geometry form and position during subsiding, strengthened the ability that existing switch track structure resisted the track bed and subsided the deformation. The defect that temporary reinforcement transition treatment measures aiming at different conditions are lacked in the existing treatment measures and the defect that the treatment method is single is overcome.

2. According to the invention, during the track bed settlement, high-precision monitoring equipment such as a video monitoring system and an electronic level gauge is adopted to monitor the integral settlement and uneven settlement of the track structure of the turnout settlement area, the analysis of monitoring data is enhanced, a settlement change curve is mastered, the settlement trend is predicted, an early warning threshold value is set for early warning, a track bed settlement monitoring, early warning and predicting system is established to form a track bed settlement monitoring platform, and the condition that the geometric form and position of the track meet the safety requirement in the line driving process is ensured; meanwhile, the precision control in the ballastless track structure lifting and balanced supporting process in subsequent permanent treatment measures is ensured. The problems that in the existing remediation measures, the remediation time cannot be mastered, and the remediation precision cannot be controlled are solved.

3. According to the invention, aiming at different conditions of the track structure of the turnout area after the ballast bed is settled stably, a grouting repair technology, a mechanical lifting and grouting repair technology and a turnout sleeper chiseling and concreting platform repair technology are respectively adopted to carry out systematic comprehensive treatment on the settlement of the integral ballast bed of the turnout area, so that the problems of single treatment technology, lack of pertinence, limited installation space or insufficient construction time and the like in the traditional treatment measures are solved.

4. The temporary measures and the reinforcing measures during the track bed settlement period are organically combined with a series of treatment measures after the settlement is stable, the settlement damage of the integral track bed in the subway turnout area is systematically treated, and the problem of the damage of the integral track bed in the turnout area in different settlement periods is thoroughly solved.

5. The method for remedying the ballastless track settlement in different settlement periods has the advantages of small operation difficulty, simple construction process, high construction speed, practicability, reliability, cost economy, strong process controllability, high implementation efficiency, high safety performance, no influence on subway operation, strong adaptability and the like, can meet the requirements of idle narrow construction and short operation time of the existing line, is suitable for reinforcing and remedying the line in different settlement periods, provides a quick, convenient, practical and economical method for solving the ballastless track settlement diseases in skylight time, and ensures the normal operation of the line.

6. The method has the advantages of no need of large-scale construction equipment, simple construction process of each renovation method, less field operation personnel, realization of accurate elevation of a ballastless track structure and quick restoration of track smoothness, reduction of damage to the ballast bed and impact on the bottom plate before and after passing of a train, and achievement of the purposes of effectively controlling the disease development speed and quickly and efficiently renovating the ballast bed settlement.

Drawings

FIG. 1 is a flow chart of a method for treating the settlement of the integral track bed in the turnout zone of a subway provided by the embodiment of the invention;

FIG. 2 is a diagram of an overall remediation concept provided by an embodiment of the present invention;

FIG. 3 is a simplified diagram of an example of a bent iron shim plate according to an embodiment of the present invention;

FIG. 4 is a three-dimensional view of an example of a bent iron shim plate according to an embodiment of the present invention;

FIG. 5 is a three-dimensional exploded view of an example of a bent iron shim plate according to an embodiment of the present invention;

FIG. 6 is a simplified diagram of a gauge tie rod steel frame according to an embodiment of the present invention;

FIG. 7 is a three-dimensional view of an example of a gauge tie rod steel frame according to an embodiment of the present invention;

FIG. 8 is a three-dimensional schematic view of a track gauge tie rod steel frame according to an embodiment of the present invention;

FIG. 9 is a simplified illustration of a steel joist provided in accordance with an embodiment of the present invention;

FIG. 10 is a three-dimensional schematic view of a steel joist provided in accordance with an embodiment of the present invention;

FIG. 11 is a flow chart of a grouting repair process provided by an embodiment of the present invention;

FIG. 12 is a schematic cross-sectional view of a grouting hole provided in an embodiment of the present invention;

fig. 13 is a schematic diagram of a quincunx arrangement of a grouting lifting grouting hole and a grouting filling grouting hole provided in an embodiment of the present invention;

FIG. 14 is a flowchart of a mechanical lift + grouting repair process provided by an embodiment of the invention;

fig. 15 is a three-dimensional schematic view of a mechanical lifting + grouting repair process according to an embodiment of the present invention;

fig. 16 is a schematic diagram illustrating a technique for repairing a concrete slab by removing the switch tie according to an embodiment of the present invention;

fig. 17 is a flowchart of a technique for repairing a concrete slab by removing the switch tie according to an embodiment of the present invention;

in the figure: 1. the track comprises a steel rail, 2, a bent iron base plate, 3, an insulating buffer base plate, 4, a track bed, 5, a lifting grouting hole, 6, a filling grouting hole, 7, a standard iron base plate, 8, a switch tie, 9, a steel joist, 10, a fastener, 11, a concrete platform, 12, a track distance pull rod, 13, an I-shaped steel beam, 14, a track distance pull rod steel frame, 15, a second fastener anchoring bolt, 16, a first fastener anchoring bolt, 17, a hanging rod, 18, a nut, 19, a jack, 20, a distribution beam, 21 and an anchoring bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 2, as a first embodiment of the present invention, there is provided a method for treating the settlement of a monolithic track bed in a subway turnout area, including:

step 1, establishing an integral track bed settlement monitoring platform in a turnout area, and monitoring settlement conditions of a settlement area and a track bed 4 adjacent to the settlement area within a certain length range in real time through the track bed settlement monitoring platform;

step 2, setting a settlement threshold, realizing automatic real-time monitoring and early warning when the settlement of the track bed 4 exceeds a certain value, and temporarily adjusting and temporarily reinforcing the settlement of the track bed 4 when the settlement of the track bed 4 is not stable;

and 3, after the temporary adjustment and the temporary reinforcement, after the ballast bed 4 is settled stably, performing comprehensive remediation on the overall turnout ballast bed 4 after the settlement is stable by adopting a permanent remediation and repair technology.

In the step 1, the turnout area integral track bed 4 settlement monitoring platform comprises a track bed 4 settlement monitoring, early warning and predicting system.

Through on-site investigation switch district whole railway roadbed 4 settlement area, set up along longitudinal distribution settlement observation point on settlement area and its adjacent railway roadbed 4 in certain length within range, adopt measuring equipment such as video monitoring system, electronic level appearance real-time supervision track vertical, horizontal and vertical displacement change, focus on the whole settlement volume and the relevant settlement volume of railway roadbed 4, establish railway roadbed 4 settlement monitoring system.

And aiming at the settlement observation of the track structure, providing early warning values of uneven settlement and integral settlement, and establishing a track bed 4 settlement early warning system. Through setting up the settlement threshold value, when 4 settlement volume of saying the bed surpassed a certain value, realize automatic real-time supervision early warning, guarantee the safe operation of circuit. The specific early warning value is determined by carrying out simulation calculation according to the actual conditions of work points and combining with the existing experience, for example, a certain work point is controlled by adopting an uneven settlement index of 15mm/20m and the maximum integral settlement of 30mm, once the early warning value is exceeded, an alarm is given to an operation unit in time, the further speed limitation of a line is correspondingly taken, and the measure of line shutdown is taken in the serious condition.

The method is characterized by comprising the steps of encrypting the frequency of track surface geometric form and position inspection of a pushing trolley on a disease point, strengthening continuous settlement observation and analysis of a civil structure, particularly strengthening monitoring data analysis during continuous settlement of the civil structure, mastering a settlement change curve, predicting settlement tendency, timely processing abnormal conditions and establishing a track bed settlement prediction system. And (3) taking speed limit passing measures (the reference speed is 25-35 km/h) for the operation train according to the monitoring condition, if the settlement is stable before reaching the limit value, the civil engineering is not remedied, and if the settlement is continuously developed and reaches the specified limit value, the civil engineering is remedied.

The settlement monitoring, early warning and predicting system for the integral track bed 4 in the turnout area can be used in the settlement renovation stage of the track bed 4 and the subsequent safe operation stage of the line in the turnout area, and the safe service of the line turnout area is ensured.

As a second embodiment of the present invention, in step 2, the temporary adjustment measures during the period when the track bed 4 is settled yet to be stabilized are specifically:

the temporary adjustment measure during the settlement of the track bed 4 is to temporarily adjust the geometric shape and position of the turnout during the settlement by using a specially-made bent iron base plate 2 to heighten a fastener 10.

The bent iron base plate 2 is a specially-made bent and thickened iron base plate, is made of the same material as that of a standard iron base plate 7 of an original turnout fastener 10, is welded on the standard iron base plate 7 of the original turnout fastener 10, and the same anchoring bolt holes are reserved in the rail bearing platform (namely, a turnout sleeper 8) part, so that the existing fastener 10 can be conveniently screwed in and fixed.

The iron tie plate 2 of buckling reserves the bolt hole of a certain amount on the backing plate of buckling of holding rail platform both sides, can wholly increase fastener 10 position anchor bolt quantity, and the additional atress that comes is increaseed to share fastener 10, stabilizes original fastener 10 simultaneously, has avoided the unfavorable appearance of anchor bolt atress that leads to of fastener 10 corresponding extension after increaseing to cut off destruction and fastener 10 and has transferred the too high track gauge developments that arouse and enlarge, bullet strip fracture scheduling problem. As shown in fig. 3 to 5, four first screw holes are reserved on each side plate of the bent iron tie plate 2 on both sides of the rail bearing platform in this embodiment, and are fixed on the switch tie 8 through a plurality of first fastener anchor bolts 16 matched with the first screw holes, a plurality of second screw holes are formed in the relative positions of the protruding portion and the standard iron tie plate 7, and are fixed on the switch tie 8 through a plurality of second fastener anchor bolts 15 matched with the second screw holes.

The bolts on the bent iron base plate 2 are made of alloy steel, so that the strength of the bolts is improved, and the problem that the fastener anchoring bolts are easy to damage and fail is solved.

Insulating buffer backing plate 3 can be packed as required under the iron tie plate 2 of buckling for providing the buffering between standard iron tie plate 7 and the concrete roadbed 4, increase the insulating nature between rail 1 and the roadbed 4 simultaneously, avoid stray current to leak.

In addition, during the continuous settlement of the track bed 4, corresponding temporary strengthening measures are also taken for the track structure in addition to the temporary adjusting measures, so that the geometric position of the track is prevented from exceeding the limit.

The temporary reinforcement means include temporarily reinforcing the switch track structure with the gage rod steel frame 14. The gauge tie rods 12 are arranged in the turnout area in an encrypted manner, and a certain number of gauge tie rods 12 are assembled into a rigid frame to ensure the integrity of steel rail parts in the turnout area and strengthen the gauge holding capacity, as shown in fig. 6-8.

The track gauge pull rod steel frame 14 is composed of a certain number of track gauge pull rods 12 and I-shaped steel beams 13, the number of the track gauge pull rods 12 is multiple, the distance between the track gauge pull rods is 650mm, and the length of each track gauge pull rod 12 is transversely arranged along a line. The two ends of the gauge tie rod 12 are connected with the I-shaped steel beam 13 in a welding mode, and the length of the I-shaped steel beam 13 is arranged longitudinally along the line.

The I-shaped steel beams 13 can be anchored to the surface of the track bed 4 through bolts, and the integral restraint of the track bed 4 and the steel rails 1 by the track gauge tie rod steel frame 14 is strengthened.

The temporary reinforcing measures also comprise the steps of reinforcing the track bed 4 temporarily through steel joists 9, enhancing the capability of resisting the settlement deformation of the track bed 4 and improving the overall rigidity and integrity of the track bed 4, as shown in fig. 9-10.

The steel joist 9 is of an I-shaped steel structure, is positioned on the outer side of the line steel rail 1, is fixed on a plurality of switch sleepers 8 through anchoring parts such as anchoring bolts 21, or is fixed on the track bed 4 on two sides of a settlement joint to integrally reinforce the track bed 4, and the I-shaped steel of the steel joist 9 in the embodiment has the size of 300mm in width, 20mm in flange thickness, 300mm in height and 20mm in web plate thickness.

The length of the steel joist 9 can be determined according to the field settlement area, and the steel joist 9 in the embodiment is 3m long.

When adopting above-mentioned temporary adjustment, reinforcement measure, in the civil engineering structure lasts the settlement period, the number of times of patrolling and examining to the regulation part is encrypted, strengthens the inspection to according to small rail car measured data, in time adjust the volume of adjusting of fastener 10, select for use the iron tie plate 2 of buckling of different thickness.

As a third embodiment of the present invention, after the civil engineering settlement deformation is converged and stabilized, permanent improvement measures are taken on the entire track bed 4 in the settlement area, and the permanent improvement method after the settlement stabilization of the track bed 4 includes a grouting repair technique, a mechanical lifting + grouting repair technique, and a turnout sleeper chiseling and concrete platform pouring repair technique (three parallel permanent repair techniques). The temporary adjustment and reinforcement measures are combined with the permanent treatment method, the settlement diseases of the track bed 4 in the turnout area are comprehensively treated, and the permanent treatment measures after the track bed 4 is settled stably are specifically explained below.

1) Permanent treatment after stable settlement of the ballast bed 4: grouting repair technology

And (3) sampling by adopting a water drilling method to check whether the track bed 4 in the turnout area is empty or not and a civil engineering structure, and if so, permanently remedying the settlement of the track bed 4 by adopting a grouting repair technology.

The grouting repair technology comprises a grouting material, equipment tools and related construction processes and steps. The repairing technology is characterized in that high polymer grouting materials with good filling property, rapid condensation and expansion characteristics are injected into a void position between the ballast bed 4 and the structural bottom plate through a grouting pipe pre-installed in a grouting hole in a certain grouting sequence under the conditions of grouting equipment process parameters such as certain grouting pressure, temperature and flow through high-pressure grouting equipment and the grouting pipe, and the upper track structure is lifted by utilizing the grouting pressure and the expansion force of grouting. In the grouting process, the vertical, horizontal and vertical displacement changes of the track structure are monitored in real time by adopting precise measurement devices such as an electronic level gauge and the like, so that the precision control in the lifting and balanced supporting processes of the settlement ballastless track structure is realized, and the geometric shape and position of the track are ensured to meet the requirements. As shown in fig. 11 to 13.

The grouting material has excellent hydrophilicity, permeability and expansibility, has good wettability and curing bonding property to clay particles in a water environment, has good bonding force after curing, meets the requirement of long-time running vibration of subway trains, has high tensile strength and shear strength, has the characteristics of being not easy to be diluted by water in the grouting process to generate dispersion, and being non-toxic, pollution-free, aging-resistant and quick-setting, and can be used for preparing organic EAA (ethylene acrylic acid copolymer), polyurethane, epoxy resin and the like, inorganic water glass-cement systems, sulphoaluminate systems and the like.

The number of rows and the row spacing of the grouting holes are determined according to the track structure size and the expansion radius of grouting materials, the grouting holes are drilled in a quincunx shape by adopting a water mill drill, the grouting holes are generally divided into lifting grouting holes 5 and filling grouting holes 6, the lifting grouting holes 5 are located in the middle of the line, and the filling grouting holes 6 are distributed on the two sides of the line and in the middle of the line. The middle grouting holes are vertically arranged downwards, and the grouting holes on two sides of the line are obliquely arranged towards the middle of the line.

The grouting restoration technology is used for sealing and grouting the longitudinal and transverse cracks of the ballast bed 4, the water gaps and the soil connecting cracks of the ballast bed 4, the water seepage positions of the expansion joints of the ballast bed 4 and the damaged positions in the water gaps before grouting and reinforcing the ballast bed board, so that the situations of slurry mixing and slurry overflow in the grouting process are avoided, the maximum filling of slurry at the bottom of the ballast bed 4 is ensured, and the best reinforcing effect is achieved.

According to the grouting repair technology, the grouting sequence is that firstly, the grouting holes 5 are lifted for grouting, and then the grouting holes 6 are filled at the two sides and the middle of the line in sequence; when the lifting grouting holes 5 are grouted, firstly, grouting is started from the lifting grouting holes 5 at the lowest point of the line, then grouting is performed on the lifting grouting holes 5 at the two sides, then grouting is performed on the filling grouting holes 6 at the left side and the right side of the line according to the sequence of quincuncial piles, and finally hole-separated grouting is performed on the filling grouting holes 6 in the middle of the line.

The grouting lifting rapid repairing technology comprises the following construction steps of site survey, monitoring network arrangement, lifting scheme formulation, track crack and water seepage position plugging in advance, drilling, equipment installation and debugging, grouting, fine adjustment of a track structure and the like, and specifically comprises the following aspects:

A. surveying the settlement condition of the on-site ballast bed 4, installing elevation measuring equipment such as an electronic level gauge and the like to measure the elevation of the ballastless track structure of the settlement area, making a specific lifting scheme according to the measuring result and engineering requirements, and establishing a lifting point monitoring network.

B. Sealing and grouting treatment is carried out on longitudinal and transverse cracks of the track bed 4, cracks between the ditch and the track bed 4, water seepage positions of expansion joints of the track bed 4 and damaged positions in the ditch;

C. marking the position of the grouting hole according to a set lifting scheme, then drilling, timely cleaning dust on site during drilling, and plugging the grouting hole by using a plugging piece;

D. and removing a plugging piece at the upper part of the grouting hole, injecting grouting materials into a lower structure of the ballastless track from the grouting pipe according to set grouting lifting technological parameters and a grouting process, lifting the track structure, and monitoring the elevation of the track structure in real time by installed elevation monitoring equipment in the lifting process.

E. And in the grouting lifting process, the grouting pressure is strictly controlled, and the phenomenon that the track bed 4 is inverted and arched after grouting is avoided. The grouting sequence is that firstly, the middle lifting grouting hole 5 is grouted, and then the grouting holes 6 filled at two sides and the grouting holes 6 filled at the middle are grouted in sequence. Grouting in the lifting grouting holes 5 from the lowest elevation point of the track structure; stopping grouting immediately after the track structure is lifted to the height set by the grouting lifting at this time; and after the grouting of the lifting grouting holes 5 is finished, grouting is performed in the middle and two sides of the line through the filling grouting holes 6 so as to ensure that grouting materials are uniformly and densely filled at the lower part of the track structure.

F. If the single lifting height does not reach the set lifting height, the procedure of the step D, E can be repeated, the track bed 4 is finally lifted to a proper position through multiple times of lifting, after the grouting is stable, the fastener 10 finely adjusts the turnout steel rail 1, and at the moment, special tool equipment adopted during the settlement period, such as the bent iron pad 2 on the fastener 10, the gauge pull rod steel frame 14 on the steel rail 1 and the steel joist 9 on the track bed 4 or the turnout sleeper 8, should be dismantled; and (4) removing the grouting pipe, plugging the grouting hole, retesting the geometric shape and position of the turnout, and recovering the traffic of the line.

2) Permanent treatment after stable settlement of the ballast bed 4: mechanical lifting and grouting repair technology

If the phenomenon of separation does not exist between the turnout zone track bed 4 and the structural bottom plate through the water drilling sampling, a certain problem exists by directly adopting a grouting repair technology. Because the concrete of the integral subway track bed 4 is generally fully paved on the side wall of the tunnel when being poured, the track bed 4 is connected with the structural bottom plate in a reinforcing way through chiseling, no gap is left at the joint surface of the new concrete and the old concrete, if no void phenomenon exists in sampling, the grouting repair technology is directly adopted, the grout is difficult to inject, and as shown in figures 14-16, the construction method of firstly supporting and then grouting reinforcement, namely the method of combining mechanical lifting and grouting repair, can be adopted for repairing.

The repairing technology combining mechanical lifting and grouting repairing comprises related equipment tools and related construction processes and steps. The repair technology combining mechanical lifting and grouting repair is characterized in that: the restoration technology combining mechanical lifting and grouting restoration comprises the following construction steps of dismantling a fastener 10 and a steel rail 1, installing a distribution beam 20, debugging a jack 19, mechanically lifting, grouting and finely adjusting a track, installing the fastener 10 and the steel rail 1, detecting and restoring lines and the like, and specifically comprises the following aspects:

A. firstly, surveying the general view of a damaged area of a ballast bed 4, and determining the length of the damaged area of the ballast bed 4;

B. dismantling the fastener 10 and the steel rail 1 within the range of the damaged length;

C. the anchoring parts are installed on the turnout zone track bed 4 through bar planting, a certain number of jacks 19 are continuously installed on two sides of the bottom plate of the trouble section track bed 4, and debugging is carried out;

D. placing the distributor beam 20 on the jack 19 across the rail;

E. the hanger rod 17 is fixedly connected with a distribution beam 20 through a nut 18, and then the distribution beam 20 is jacked up by a jack 19 to realize the lifting of the track;

F. after the jacking height meets the requirement, grouting materials are poured into a gap formed between the lifted ballast bed 4 and the structural bottom plate; the grouting repair technology steps and the construction process are the same as above;

G. finely adjusting the ballast bed plate;

H. after the strength of the grouting material meets the design requirement, the plate is dropped and the jacking and grouting equipment is removed;

I. installing a fastener 10 and a steel rail 1;

J. and detecting the smooth state of the line, and recovering the normal traffic after meeting the requirements.

3) Permanent treatment after stable settlement of the ballast bed 4: repair technology for chiseling switch tie and pouring concrete again on platform

If the number of field jacking equipment, the installation space are limited or the construction time is insufficient, the technology of mechanical lifting and grouting repair is difficult to realize, and the technology of chiseling the switch tie and pouring the concrete platform again can be adopted, as shown in fig. 17.

The technology for repairing the concrete platform by chiseling out the switch tie and pouring the concrete again comprises equipment tools and related construction processes and steps. The technology for repairing the concrete platform for chiseling the switch tie and pouring again comprises the following construction steps of determining a fastener 10 with a to-be-chiseled switch tie 8, dismounting the fastener 10 above the to-be-chiseled switch tie 8, chiseling the concrete of the switch tie 8, cleaning a railway bed plate, binding a reinforcement cage, mounting the fastener 10 of the original switch tie 8, arranging a plastic sleeve, erecting and pouring the concrete, dismounting a mold, taking out the fastener 10, mounting the fastener 10 of the original switch tie 8, retesting and recovering and the like through site survey, and specifically comprises the following aspects:

A. determining the turnout sleeper 8 to be chiseled according to the site survey and settlement monitoring results in a 'three-by-one' mode, and marking on site;

B. removing the fastener 10 above the marked switch tie 8;

C. chiseling the marked switch tie 8 and concrete in a certain range around the switch tie 8, wherein the width and length of a chiseled pit are the same as those of the bottom of the original sleeper, the depth of the chiseled pit is equal to the bottom surface of the sleeper, and connecting steel bars of the original switch tie 8 around the pit extending into a track bed 4 are reserved;

D. cleaning the foundation pit and the surface of the bed plate after the switch tie 8 is chiseled off;

E. adopting square timber to temporarily support the surfaces of the track beds 4 on the two sides of the chiseled sleeper;

F. connecting newly-laid steel bars in the pits with connecting steel bars which originally extend into the roadbed 4 and are positioned around the pits in a welding anchoring mode, implanting the steel bars into the bottoms of the pits through drilling holes, binding the steel bars to form a steel bar cage, and coating interface agents around the steel bars to strengthen the binding effect of new and old concrete;

G. installing the original switch tie 8 fastener 10 with the switch tie 8 chiseled off and the plastic sleeve, adjusting the combination shape and position of the track, and installing a template around the fastener 10;

H. pouring concrete;

I. after the concrete is solidified to reach a certain strength, the template and the fastener 10 are removed, so that the steel rail 1 is suspended, and the newly poured concrete platform 11 is prevented from being damaged due to early stress;

J. further curing the concrete, after the newly poured concrete meets the bearing requirement, reinstalling the fastener 10, removing the square timber, retesting the geometric shape and position of the line, and recovering the normal operation of the line.

In the construction of the repair technology for the concrete platform for re-pouring the chiseled switch tie, dust is generated when existing ballast bed concrete is chiseled, a shower head is specially configured, and water spraying operation is carried out while chiseling, so that dust is reduced; and meanwhile, a station fan is started to eliminate dust.

In the construction of the technology for chiseling the switch tie and pouring the concrete again, the cast-in-place concrete bearing rail platform can be considered to adopt a composite sleeper with a connecting device, and the composite sleeper has the advantages of high strength rise, easiness in punching and installing the fastener 10, convenience in grooving and reducing, high cushion plate height adjustment and the like.

The invention provides a settlement renovation method and a tool for an integral track bed of a subway turnout area, which are used for renovating and repairing the integral track bed 4 of the turnout in different settlement periods. Aiming at the track bed 4 during the sedimentation period, the special bent iron base plate 2 is used for heightening the fastener 10, and the geometric shape and position of the turnout during the sedimentation period are temporarily adjusted, so that the geometric shape and position of the turnout meet the requirements of safe driving; the track gauge holding capacity and the integrity of the track bed 4 are strengthened by temporary reinforcement measures of the track gauge pull rod steel frame 14 and the steel joist 9; aiming at different conditions of the track bed 4 after settlement stabilization, a separate grouting repair technology, a mechanical lifting and grouting repair technology and a permanent renovation and repair technology for chiseling the turnout sleeper and pouring a concrete platform again are adopted to carry out comprehensive renovation on the turnout integral track bed 4 after settlement stabilization.

By adopting the temporary adjustment measure of the specially-made bent iron backing plate 2 heightening fastener 10, the geometric shape and position of the line during the period that the ballast bed 4 is settled but not stabilized can be ensured to meet the requirement of safe driving. By adopting the adjusting method and the tool for bending the iron base plate 2, the number of the anchor bolts at the position of the fastener 10 can be increased, the extra stress caused by the height adjustment of the fastener 10 is shared, the original fastener system is stabilized, and the problems of unfavorable stress of the anchor bolts, shearing damage, dynamic expansion of the track gauge, breakage of elastic strips and the like caused by the corresponding lengthening of the bolts after the height adjustment of the fastener 10 are solved.

On the basis of adopting the temporary adjustment measure, adopt simultaneously to add the temporary reinforcement measure who establishes gauge tie rod steelframe 14 and steel joist 9, strengthen gauge holding power and the overall stability of circuit, avoided the track bed 4 to subside the deterioration of the geometric shape position of track bed 4 and threaten driving safety, strengthened the ability that existing switch track structure resisted the track bed 4 and subsided the deformation. The defect that temporary reinforcement transition treatment measures aiming at different conditions are lacked in the existing treatment measures and the defect that the treatment method is single is overcome.

During the settlement of the track bed 4, monitoring the integral settlement and uneven settlement of the track structure in the turnout settlement area by adopting high-precision monitoring equipment such as a video monitoring system and an electronic level gauge, enhancing the analysis of monitoring data, mastering a settlement change curve, predicting the settlement trend, setting an early warning threshold value for early warning, establishing a monitoring, early warning and predicting system for the settlement of the track bed 4, forming a track bed 4 settlement monitoring platform, and ensuring that the geometric form and position of the track meet the safety requirements in the line driving process; meanwhile, the precision control in the ballastless track structure lifting and balanced supporting process in subsequent permanent treatment measures is ensured. The problems that in the existing remediation measures, the remediation time cannot be mastered, and the remediation precision cannot be controlled are solved.

Aiming at different conditions of the track structure of the turnout zone after the ballast bed 4 is settled stably, a grouting repair technology, a mechanical lifting and grouting repair technology and a turnout sleeper chiseling and concreting platform repair technology are respectively adopted to carry out systematic comprehensive treatment on the settlement of the integral ballast bed 4 of the turnout zone, and the problems of single treatment technology, lack of pertinence, limited installation space or insufficient construction time and the like in the traditional treatment method are solved.

The temporary measures and the reinforcing measures during the settlement of the track bed 4 are organically combined with a series of treatment measures after the settlement is stable, the settlement damage of the integral track bed 4 in the subway turnout area is systematically treated, and the problem of the damage of the integral track bed 4 in the turnout area during different settlement periods is thoroughly solved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.