阅读说明：本技术 一种改进型轨道结构及其施工方法 (Improved track structure and construction method thereof ) 是由 丁建隆 刘小清 杨刚 田骥 刘光胜 何云伟 王先维 周斌 杨东明 任志江 曾建 于 2021-07-15 设计创作，主要内容包括：本发明公开了一种改进型轨道结构及施工方法,属于轨道交通的技术领域,包括混凝土道床和钢轨,所述钢轨两侧布置有轨枕螺栓孔,各个轨枕螺栓孔分别安装有扣件,该轨道结构还包括：分别对应左右轨的承轨槽,承轨槽设有一槽口,且钢轨嵌装于该槽口内,且槽口与钢轨之间填充有槽内阻尼材料,承轨槽通过混凝土道床上对应的轨枕螺栓孔安装紧固,且承轨槽所对应的各个轨枕螺栓孔拆除既有的扣件；槽内阻尼材料包括：轨下垫板、调轨组件和高分子阻尼材料,所述轨下垫板设于钢轨的下方,调轨组件布置于钢轨的轨腰两侧并作用于槽口的侧壁上,高分子阻尼材料填充于槽口内,以达到提升轨道线路的减振降噪效果,并对轨道的杂散电流防护起到良好效果的目的。(The invention discloses an improved track structure and a construction method, belonging to the technical field of track traffic, and comprising a concrete track bed and a steel rail, wherein sleeper bolt holes are arranged on two sides of the steel rail, fasteners are respectively arranged on the sleeper bolt holes, and the track structure also comprises: the rail supporting grooves respectively correspond to the left rail and the right rail, each rail supporting groove is provided with a notch, the steel rails are embedded in the notches, a groove internal damping material is filled between each notch and each steel rail, the rail supporting grooves are installed and fastened through corresponding sleeper bolt holes on a concrete track bed, and existing fasteners are removed through the sleeper bolt holes corresponding to the rail supporting grooves; the in-groove damping material includes: rail lower bolster, transfer rail subassembly and polymer damping material, the below of rail is located to the rail lower bolster, transfers the rail subassembly to arrange in the web of rail both sides of rail and act on the lateral wall of notch on, the polymer damping material is filled in the notch to reach the damping noise reduction effect that promotes the track circuit, and protect the purpose that plays good effect to orbital stray current.)

1. The utility model provides an improved generation track structure, includes the concrete roadbed and lays the rail on the concrete roadbed, a plurality of sleeper bolt hole has been arranged to the rail both sides, and each sleeper bolt hole corresponds the fastener of installing the fastening rail respectively, and its characterized in that, this track structure still includes:

the rail supporting grooves respectively correspond to the left rail and the right rail, each rail supporting groove is provided with a notch, the steel rails are embedded in the notches, in addition, damping materials in the grooves are filled between the notches and the steel rails, the rail supporting grooves are installed and fastened through corresponding sleeper bolt holes in a concrete track bed, and existing fasteners are removed through the sleeper bolt holes corresponding to the rail supporting grooves;

wherein the in-groove damping material comprises: the rail lower backing plate is arranged below the steel rail; the rail adjusting assemblies are arranged on two sides of the rail web of the steel rail and act on the side walls of the notches; the high-molecular damping material is filled in the notch.

2. The improved track structure as claimed in claim 1, wherein the rail adjusting assembly comprises a retainer and a wedge block, the retainer is embedded in the web of the steel rail, one end of the wedge block is in inclined fit with the retainer, and the other end of the wedge block is abutted against the side wall of the notch.

3. The improved track structure as claimed in claim 1, wherein said under-track pad comprises an elastic pad and a plurality of height-adjusting pads, said elastic pad is laid on the bottom of the slot, each of said height-adjusting pads is arranged between the elastic pad and the bottom of the steel rail at equal intervals.

4. The improved track structure as claimed in claim 1, wherein said under-track pad is a plurality of height-adjusting pads laid in the slot, and a gap between each of said height-adjusting pads is filled with a polymer damping material.

5. An improved track structure as claimed in claim 1, wherein the concrete track bed is of a sleeper-type structure or a sleeper-free structure, and if the concrete track bed is of a sleeper-type structure, the sleeper bolt holes are respectively formed in each sleeper.

6. An improved track structure as claimed in claim 1, wherein the rail supporting groove is a "U" shaped structure, the middle part of the rail supporting groove is provided with the notch, and both sides of the rail supporting groove are respectively provided with at least two openings, each opening respectively corresponds to each sleeper bolt hole and each opening is provided with a bolt member fixed to the rail supporting groove.

7. An improved track structure as defined in claim 6, wherein said rail bearing groove comprises: the inner groove plate is arranged on one side of the bottom plate of the outer groove plate, and the inner groove plate and the outer groove plate are both provided with the openings.

8. An improved track structure according to claim 6, characterized in that the corners of the inner and/or outer channel plates are provided with stiffening webs.

9. A construction method of an improved track structure, characterized in that the construction method is based on the improved track structure as claimed in any one of claims 1-8, the construction method is divided into two skylight periods, which includes:

during the first skylight period

S1: removing the existing fasteners and iron base plates matched with the fasteners at intervals;

s2: laying a groove lower base plate in a corresponding area where the fastener is removed, and installing and fixing a rail bearing groove on the groove lower base plate through an existing sleeper bolt hole on the concrete track bed;

s3: measuring the geometric shape and position of the steel rail, adjusting the height of the steel rail through a lower rail backing plate, and adjusting the gauge of the steel rail through a rail adjusting assembly;

during the second skylight period

S4: plugging gaps at two ends of a rail bearing groove, mixing and stirring all components of a high molecular damping material uniformly on site, pouring the mixture into the rail bearing groove, and locking a steel rail after the high molecular damping material is cured;

s5: and repeating the steps from S1 to S4 to complete the line reconstruction of the section.

10. A construction method of an improved track structure, characterized in that the construction method is based on the improved track structure as claimed in any one of claims 1-8, the construction method comprising:

t1: workshop prefabricated inslot structure

a. Measuring the linear state of the steel rail in advance, and assembling the rail bearing grooves for later use;

b. laying a rail lower base plate at the bottom of the rail bearing groove, putting the steel rail into the rail bearing groove, installing a rail adjusting assembly at the rail web of the steel rail, and adjusting and fixing the geometric shape and position of the steel rail through the rail lower base plate and the rail adjusting assembly;

c. mixing and stirring the components of the macromolecular damping material uniformly, pouring the mixture into a rail bearing groove, curing and locking the steel rail;

t2: the following work is done during the first skylight period:

d. transporting the in-groove structure prefabricated in the step T1 to a line reconstruction site;

e. removing the existing fasteners and steel rails in the modification area of the skylight period;

f. laying a groove lower cushion plate in a corresponding area where the fastener is removed, and installing and fixing a groove inner structure on the groove lower cushion plate through an existing sleeper bolt hole on the concrete track bed;

g. the steel rails at the two ends of the in-groove structure are connected with the steel rail of the next section of non-transformed line by adopting a bulge clamping plate, and the parts of the steel rails at the two ends of the in-groove structure, which are not poured with high polymer materials, are fixed by fasteners;

t3: the following work is done during the second skylight period:

h. executing steps d to f in step T2;

i. welding and connecting the steel rail at one end of the in-groove structure in the step with the steel rail at the end of the in-groove structure after the T2 transformation in the last step;

t4: the following work is done during the third skylight period:

removing fasteners corresponding to the steel rails at two ends of the in-groove structure in the step T2 and the step T3, laying a groove lower cushion plate in a region corresponding to the removed fasteners, and installing and fixing rail bearing grooves on the groove lower cushion plate through existing sleeper bolt holes on a concrete track bed;

plugging gaps at two ends of a rail bearing groove, mixing and stirring all components of the macromolecular damping material uniformly on site, pouring the mixture into the rail bearing groove, and locking the steel rail after the macromolecular damping material is cured;

t5: and repeating the steps from T2 to T4 to complete the line reconstruction of the section.

Technical Field

The invention belongs to the technical field of rail transit, and particularly relates to an improved rail structure and a construction method thereof.

Background

Urban rail transit can better solve traffic jams and promote urban development, but along with the increase of line operation time, a plurality of problems of exposing rail lines are solved.

In urban rail transit, particularly subway rails, the lines of the urban rail transit mainly pass through densely populated areas and important buildings, and the vibration and noise generated during train running seriously affect the life and work of people along the lines, so that the vibration and noise treatment of the existing lines becomes a problem which is urgently needed to be solved by operating lines; on the other hand, iron chips, oil stains and the like generated by grinding the steel rail in the operation process of the track line are attached to the fastener, so that the ground insulation resistance value of the steel rail is reduced, and track stray current corrodes the pre-buried pipeline of the line.

To the protection of line vibration noise and stray current, various transformation measures have been taken by operation units in various places, but the existing transformation measures still have more problems, and the transformation effect can not completely meet the line operation requirements.

Disclosure of Invention

In view of the above, in order to solve the above problems in the prior art, the present invention is directed to an improved track structure and a construction method thereof, so as to achieve the purposes of improving the vibration reduction and noise reduction effects of a track line and achieving a good effect of protecting the track from stray currents.

The technical scheme adopted by the invention is as follows: the utility model provides an improved generation track structure, includes the concrete roadbed and lays the rail on the concrete roadbed, a plurality of sleeper bolt hole has been arranged to the rail both sides, and each sleeper bolt hole corresponds the fastener of installing the fastening rail respectively, and this track structure still includes:

the rail supporting grooves respectively correspond to the left rail and the right rail, each rail supporting groove is provided with a notch, the steel rails are embedded in the notches, in addition, damping materials in the grooves are filled between the notches and the steel rails, the rail supporting grooves are installed and fastened through corresponding sleeper bolt holes in a concrete track bed, and existing fasteners are removed through the sleeper bolt holes corresponding to the rail supporting grooves; a groove lower base plate is arranged between the rail bearing groove and the sleeper;

wherein the in-groove damping material comprises: the rail lower backing plate is arranged below the steel rail; the rail adjusting assemblies are arranged on two sides of the rail web of the steel rail and act on the side walls of the notches; the high-molecular damping material is filled in the notch.

Further, the rail adjusting assembly comprises a retainer and a wedge block, the retainer is embedded in the rail web of the steel rail, one end of the wedge block is in inclined plane fit with the retainer, the other end of the wedge block abuts against the side wall of the notch, and the geometric shape of the steel rail is adjusted under the combined action of the retainer and the wedge block so as to meet the requirements of line design.

Further, the backing plate includes elastic backing plate and a plurality of backing plate of increaseing under the rail, elastic backing plate lays in the bottom of notch, by the vertical rigidity of elastic backing plate governing system, each the increase backing plate is equidistant arranging between the bottom of elastic backing plate and rail, by increaseing the backing plate adjustment rail elevation.

Furthermore, the rail lower base plate is a plurality of heightening base plates paved in the notch, a polymer damping material is poured in a gap between the heightening base plates, and the height of the steel rail is adjusted by the heightening base plates.

Further, the concrete track bed adopts a sleeper type structure or a non-sleeper type structure, if the concrete track bed is of the sleeper type structure, the sleeper bolt holes are formed in all sleepers, and different concrete track bed structures are selected according to specific line conditions.

Furthermore, the rail bearing groove is of a U-shaped structure, the middle of the rail bearing groove is provided with the notch, two sides of the rail bearing groove are respectively provided with at least two openings, each opening corresponds to each sleeper bolt hole, and each opening is provided with a bolt piece for fixing the rail bearing groove, so that when the rail bearing groove is installed, the original sleeper bolt holes on the existing line can be directly utilized.

Further, the rail groove includes: the L-shaped inner groove plate and the T-shaped outer groove plate are arranged on one side of the bottom plate of the outer groove plate, the openings are formed in the inner groove plate and the outer groove plate, the L-shaped inner groove plate is arranged on the inner side of the steel rail, the T-shaped outer groove plate is arranged on the outer side of the steel rail, and the assembled rail bearing groove formed by the inner groove plate and the outer groove plate is beneficial to field construction and installation.

Furthermore, the corner of the inner trough plate and/or the outer trough plate is provided with a reinforcing rib plate, when the device is actually applied, the outer trough plate of the reinforcing rib plate is selected to be arranged on the outer side of the line, the L-shaped inner trough plate is arranged on the inner side of the line, the outer side of the line bears the horizontal component force load of the train, and the structural stress experience calculation meets the design requirements.

The invention also provides a construction method of the improved track structure, which is implemented by dividing the construction method into two skylight periods based on the improved track structure and comprises the following steps:

during the first skylight period

S1: removing the existing fasteners and iron base plates matched with the fasteners at intervals, polishing and derusting contact surfaces of the steel rails and the high-molecular damping materials, and polishing interfaces and brushing an interface agent after cleaning;

s2: laying a lower groove base plate in a corresponding area where the fastener is removed, installing and fixing a rail bearing groove on the lower groove base plate through an existing sleeper bolt hole on a concrete track bed, polishing the inner wall of the rail bearing groove in advance, coating an interface agent on two side walls, coating an adhesive on the bottom of the rail bearing groove and sticking an elastic base plate;

s3: measuring the geometric shape and position of the steel rail, adjusting the height of the steel rail through a lower rail backing plate, and adjusting the gauge of the steel rail through a rail adjusting assembly; in practical application, the inverted T-shaped outer slot plate is installed, the L-shaped inner slot plate is installed after the height of the steel rail is adjusted, and the gauge is adjusted.

During the second skylight period

S4: plugging gaps at two ends of a rail bearing groove, mixing and stirring all components of a high molecular damping material uniformly on site, pouring the mixture into the rail bearing groove, and locking a steel rail after the high molecular damping material is cured;

s5: and repeating the steps from S1 to S4 to complete the line reconstruction of the section.

The invention also provides a construction method of the improved track structure, which is based on the improved track structure and comprises the following steps:

t1: workshop prefabricated inslot structure

a. Measuring the linear state of the steel rail in advance, and assembling the rail bearing grooves for later use;

b. laying a rail lower base plate at the bottom of the rail bearing groove, putting the steel rail into the rail bearing groove, installing a rail adjusting assembly at the rail web of the steel rail, and adjusting and fixing the geometric shape and position of the steel rail through the rail lower base plate and the rail adjusting assembly;

c. mixing and stirring the components of the macromolecular damping material uniformly, pouring the mixture into a rail bearing groove, curing and locking the steel rail;

t2: the following work is done during the first skylight period:

d. transporting the in-groove structure prefabricated in the step T1 to a line reconstruction site;

e. removing the existing fasteners and steel rails in the modification area of the skylight period;

f. laying a groove lower cushion plate in a corresponding area where the fastener is removed, and installing and fixing a groove inner structure on the groove lower cushion plate through an existing sleeper bolt hole on the concrete track bed;

g. the steel rails at the two ends of the in-groove structure are connected with the steel rail of the next section of non-transformed line by adopting a bulge clamping plate, and the parts of the steel rails at the two ends of the in-groove structure, which are not poured with high polymer materials, are fixed by fasteners;

t3: the following work is done during the second skylight period:

h. executing steps d to f in step T2;

i. welding and connecting the steel rail at one end of the in-groove structure in the step with the steel rail at the end of the in-groove structure after the T2 transformation in the last step;

t4: the following work is done during the third skylight period:

removing fasteners corresponding to the steel rails at two ends of the in-groove structure in the step T2 and the step T3, laying a groove lower cushion plate in a region corresponding to the removed fasteners, and installing and fixing rail bearing grooves on the groove lower cushion plate through existing sleeper bolt holes on a concrete track bed;

plugging gaps at two ends of a rail bearing groove, mixing and stirring all components of the macromolecular damping material uniformly on site, pouring the mixture into the rail bearing groove, and locking the steel rail after the macromolecular damping material is cured;

t5: and repeating the steps from T2 to T4 to complete the line reconstruction of the section.

The invention has the beneficial effects that:

1. by adopting the improved track structure provided by the invention, the fastener for fastening the steel track in the original track structure is transformed into the track bearing groove, the steel track is wrapped and locked by pouring the high-molecular damping material in the track bearing groove, the vibration energy of the steel track is absorbed by the damping material, the vibration amplitude of the steel track is reduced, and the effects of vibration and noise reduction are achieved.

2. By adopting the construction method of the improved track structure provided by the invention, the reconstruction of the existing line is completed by reasonably utilizing different skylight periods, the normal running of vehicles is not hindered in the reconstruction construction process, the reconstruction difficulty and the cost of the line are greatly reduced, and more possibilities are provided for solving the problems of vibration reduction, noise reduction and stray current protection of the line.

Drawings

FIG. 1 is a schematic view of the overall structure of an improved track structure provided by the present invention;

FIG. 2 is a schematic structural view of an improved track structure provided by the present invention from another perspective;

FIG. 3 is a schematic cross-sectional view of the improved track structure after the polymer damping material is poured;

FIG. 4 is a schematic cross-sectional view of the improved track structure provided by the present invention before the polymer damping material is poured;

FIG. 5 is a schematic view showing the removal of a fastener in embodiment 2 according to the construction method of the improved track structure of the present invention;

FIG. 6 is a schematic view of a work schedule of a skylight period in example 2 of the construction method of the improved track structure provided by the present invention;

the drawings are labeled as follows:

the concrete track comprises, by weight, 1-a concrete track bed, 2-sleepers, 3-bolts, 4-a left groove plate, 5-a polymer damping material, 6-an elastic base plate, 7-a heightening base plate, 8-a right groove plate, 9-a steel rail, 10-fasteners, 11-a groove lower base plate, 12-a reinforcing rib plate, 13-a retainer and 14-a wedge block.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that the indication of the orientation or the positional relationship is based on the orientation or the positional relationship shown in the drawings, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, or the orientation or the positional relationship which is usually understood by those skilled in the art, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, cannot be understood as limiting the present invention. Furthermore, the terms "first" and "second" are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be further noted that the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases by those skilled in the art; the drawings in the embodiments are used for clearly and completely describing the technical scheme in the embodiments of the invention, and obviously, the described embodiments are a part of the embodiments of the invention, but not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Example 1

To existing track circuit, it includes existing concrete roadbed 1 and lays the rail 9 on the concrete roadbed, and this concrete roadbed 1 when the practical application, it can adopt sleeper formula structure or no sleeper 2 structure, in this embodiment to adopt sleeper formula structure, for the installation fastening to rail 9 of realization, has arranged a plurality of sleeper bolt hole in rail 9 both sides, and each on corresponding sleeper 2 is located respectively to the sleeper bolt hole, and simultaneously, each sleeper bolt hole corresponds respectively and installs fastener 10 of fastening rail 9, and fastener 10 is supporting has the iron gasket, under the effect of fastener 10 and gasket, compresses tightly the fastening through fastener 10 to the bottom of rail 9.

And specifically disclose an improved generation track structure in this embodiment, this track structure need reform transform existing track structure to change the lock solid form of rail 9, adopt polymer damping material 5 to wrap up and lock solid rail 9 completely, restrain rail 9 vibration from the source, in order to reach the effect of vibration damping and noise reduction, simultaneously, polymer damping material 5 has high insulating nature, has played fine effect to orbital stray current protection. This track structure mainly includes: in the embodiment, each side of the rail bearing groove corresponds to two existing sleeper bolt holes, and the existing fastener 10 is removed from each sleeper bolt hole corresponding to the rail bearing groove, in other words, the rail bearing groove is used for replacing the function of the existing fastener 10, and meanwhile, the problems of vibration, noise and stray current of the steel rail 9 can be solved due to the arrangement of the rail bearing groove.

Damping material in groove

The inslot damping material is filled in the notch, and the inslot damping material includes: the rail adjusting device comprises a rail lower base plate, a rail adjusting assembly and a high polymer damping material 5.

Locate rail 9's below with rail bed plate, rail bed plate can adopt following two kinds of modes, mode one: the backing plate includes elastic backing plate 6 and a plurality of backing plate 7 of increaseing, elastic backing plate 6 lays in the bottom of notch for governing system vertical rigidity, each heightening backing plate 7 and being equidistant arranging on elastic backing plate 6 on the surface to be located between the bottom of elastic backing plate 6 and rail 9, be used for adjusting rail 9 elevation, with realize the support to rail 9 under the combined action through elastic backing plate 6 and increaseing backing plate 7, simultaneously, also can adjust to suitable position to rail 9's elevation.

The second method comprises the following steps: except for the arrangement in the first mode, according to the requirement of the rigidity of the track structure, the elastic base plates 6 can be not laid at the bottoms of the steel rails 9, the heightening base plates 7 are directly laid at the bottoms of the notches, and the macromolecular damping materials 5 are poured and filled in gaps among the heightening base plates 7, so that the requirement can be met.

Arranging rail adjusting components on two sides of the rail web of the steel rail 9 and acting on the side walls of the notches so as to adjust the rail gauge of the steel rail 9 through the rail adjusting components; the rail adjusting component comprises a retainer 13 and a wedge block 14, the retainer 13 is embedded in the rail web of the steel rail 9, one end of the wedge block 14 is in inclined plane fit with the retainer 13, and the other end of the wedge block is abutted to the side wall of the notch. The working principle is as follows: the retainer 13 and the wedge block 14 are matched with a locking structure through wedge surfaces, the retainer 13 is installed on the rail web of the steel rail 9, when the steel rail 9 needs to be adjusted inwards, the outer wedge block 14 of the steel rail 9 is installed firstly, the wedge block 14 is knocked downwards to enable the steel rail 9 to move inwards, after the position of the steel rail 9 is adjusted to the position, the inner wedge block 14 is installed, and the inner wedge block 14 and the outer wedge block 14 are knocked tightly at the same time to fix the left position and the right position of the steel rail 9.

The high-molecular damping material 5 is filled in the notch, the high-molecular damping material 5 is a bi-component or multi-component, after the height and the plane position of the steel rail 9 are adjusted in place, the high-molecular damping material 5 is mixed and stirred uniformly, poured in the notch of the rail bearing groove to fill the surrounding gap of the steel rail 9, and the steel rail 9 is locked after solidification.

The rail bearing groove is designed into a U-shaped structure, the rail bearing groove can be made of steel or other materials meeting the structural requirements, the middle part of the rail bearing groove is provided with the notch, and the steel rail 9 is embedded in the notch. At least two openings are respectively arranged on two sides of the rail bearing groove, each opening corresponds to each sleeper bolt hole and is provided with 3 bolts for fixing the rail bearing groove, the 3 bolts are used for fixing the rail bearing groove, and for the 3 bolts, the bolts 3 and gaskets matched with the original fasteners 10 can be adopted, and other bolts 3 and gaskets meeting the structural requirements can also be adopted. In practical application, the rail supporting groove may be assembled or welded or cast, and in this embodiment, the rail supporting groove of the assembled structure is taken as an example.

Specifically, the rail bearing groove comprises an L-shaped inner groove plate and an inverted T-shaped outer groove plate, the inner groove plate is arranged above one side of a bottom plate of the outer groove plate, the inner groove plate and the outer groove plate are respectively provided with the open holes, and one side of the inner groove plate is fastened in the corresponding sleeper bolt hole after sequentially penetrating through the open hole of the inner groove plate and the open hole of the outer groove plate by 3 bolts; and one side of the outer slot plate is fastened in the corresponding sleeper bolt hole after the bolt 3 passes through the hole of the outer slot plate. In practical application, in order to ensure that the track structure has enough strength, the corner of the outer trough plate arranged on the outer side of the track line is provided with the reinforcing rib plate 12, the outer side of the line bears the horizontal component load of a train, and the structural stress experience calculation meets the design requirement.

Above-mentioned track structure that provides, its bolt fastening who adopts the sleeper is held the rail groove, fills polymer damping material lock solid rail in holding the rail groove, and the material absorbs rail vibration energy, plays the effect of control rail vibration and noise reduction, simultaneously because the rail is wrapped up by high insulating polymer damping material completely, the rail increases to ground insulation resistance, has solved the problem of track stray current protection.

Example 2

The invention also provides a construction method of the improved track structure, based on the improved track structure in the embodiment 1, the construction method is implemented by pouring the damping material in the groove on site on the whole, each modification construction task is divided into two skylight periods, the skylight period refers to the idle period of the train running line, and the line modification can be carried out in the skylight period, and the construction method comprises the following steps:

during the first skylight period

S1: removing the existing fasteners 10 and iron backing plates matched with the fasteners 10 at intervals; the method specifically comprises the following steps: and removing the existing bolts 3, the elastic strips, the iron base plates and the like of the lines. The dismounting range of the fastener 10 is 2-2 dismounting at a partition or 2-4 dismounting at a partition or other combined dismounting methods, so that the partition pouring is realized, and the partition pouring is not limited, so that the speed limit of the train during the skylight is ensured, the traffic is not interrupted, and the train is not stopped.

S2: and laying a groove lower cushion plate 11 in a corresponding area where the fastener 10 is removed, and installing and fixing the rail bearing groove on the groove lower cushion plate 11 through an existing sleeper bolt hole on the concrete track bed. In order to facilitate the installation of the rail bearing groove, the assembled rail bearing groove in the embodiment 1 is adopted. The outer trough plate (provided with the reinforcing rib plates 12) of the rail bearing trough is arranged on the outer side of the line, the inner trough plate (L-shaped side plate) is arranged on the inner side of the line, the outer side of the line bears the horizontal component force load of the train, and the structural stress experience calculation meets the design requirements.

The existing sleeper bolt holes on the sleepers 2 are utilized, the matched bolts 3 are screwed up and fix the rail bearing grooves (after the height of the steel rail 9 is adjusted in place, the inner groove plates of the rail bearing grooves are spliced, and the bolts 3 on the inner side of the line are screwed up).

S3: measure 9 geometric shapes of rail position, through the 9 elevations of rail bed plate adjustment, specifically do: measuring the geometric shape and position of the steel rail 9 by adopting a track gauge or other measuring equipment, and adjusting the elevation of the steel rail 9 by increasing or decreasing the height-adjusting base plate 7 on the position of the steel rail 9 needing to be adjusted; 9 height adjustment of rail are accomplished the back, and the inside recess board of installation support rail groove to screw up bolt 3 and with final fixed support rail groove, through adjusting 9 distances of rail subassembly adjustment, specifically do: a track gauge ruler or other measuring equipment is adopted to measure the track gauge of the steel rail 9, and the track gauge of the steel rail 9 is adjusted through a track adjusting assembly at the position where the track gauge of the steel rail 9 needs to be adjusted.

During the second skylight period

S4: firstly, retesting, adjusting and fixing the geometric position of the steel rail 9, then plugging gaps and other gaps at two ends of a rail bearing groove, mixing and stirring the components of the macromolecular damping material 5 uniformly on site, pouring the mixture into the rail bearing groove, and locking the steel rail 9 after the macromolecular damping material 5 is cured to restore the normal vehicle-passing condition;

s5: repeating the steps S1-S4 until all the existing fasteners 10 on the existing line are replaced, so as to complete the line reconstruction.

In the construction method of this embodiment, the transformation of the one-side steel rail 9 is performed first, and after the transformation of the one-side steel rail 9 is completed, the transformation of the other-side steel rail 9 is performed, and one steel rail 9 should be kept still all the time in the transformation process to be used as a measurement reference object in the transformation process.

Example 3

The construction method is based on the improved track structure, the construction method is integrally characterized in that the structure in a groove is prefabricated in a workshop, the steel rails 9 are welded after the structure is assembled on site, each section of transformation task is completed in a skylight period, and post-pouring section construction between the first section and the second section is performed when the third section of transformation is performed or after all the transformation is completed. Specifically, the construction method comprises the following steps:

t1: workshop prefabricated inslot structure

a. Measuring the linear state of the steel rail 9 in advance, assembling and fixing the rail bearing groove in a place meeting the prefabrication production and maintenance requirements of the structure in the groove, and using the assembled rail bearing groove for later use, wherein the process does not need to occupy a skylight period;

b. laying a rail lower backing plate at the bottom of the rail bearing groove, placing the steel rail 9 into the rail bearing groove, installing a rail adjusting assembly at the rail web of the steel rail 9, and adjusting and fixing the geometric shape and position of the steel rail 9 through the rail lower backing plate and the rail adjusting assembly;

c. mixing and stirring the components of the macromolecular damping material 5 uniformly, pouring the mixture into a rail bearing groove, curing the mixture, and locking the steel rail 9; in the step T1, the length of the prefabricated in-groove structure is 25m, and no rail supporting groove is installed on the 9 sections of the steel rail, which are reserved at both ends with a length of 0.625m (the distance between two sleepers 2), respectively, and after all in-groove structures are transformed, the steel rail 9 at the end of each in-groove structure is welded, the rail supporting groove is installed, and the high molecular damping material 5 is cast in situ on the rail supporting groove to lock the steel rail 9. In short, for the in-groove structure, it includes rail 9 and a plurality of rail supporting grooves embedded on rail 9, and at the same time, the length of two sleeper 2 spacing is reserved at two ends of rail 9, and no rail supporting groove is installed (in this embodiment, one rail supporting groove corresponds to three sleeper 2 spacing, therefore, after two in-groove structures are spliced, the end of rail 9 corresponding to two in-groove structures can be just installed with one rail supporting groove on site after being spliced.)

T2: the following work is done during the first skylight period:

d. transporting the groove structure prefabricated in the step T1 to a line reconstruction site, and transporting by adopting a flat car in actual application;

e. demolish existing fastener 10 and rail 9 in this skylight period transformation scope, promptly: removing the bolts 3, the elastic strips, the iron base plates and the like, sawing off the original line steel rails 9 by using a rail sawing machine, and transporting and recycling by using a flat car;

f. laying a groove lower cushion plate 11 in a corresponding area of the removed fastener 10, installing and fixing a groove inner structure on the groove lower cushion plate 11 through an existing sleeper bolt hole on a concrete track bed, and fixing the groove inner structure by adopting an original sleeper bolt hole of a sleeper 2 and a matched bolt 3;

g. the steel rails 9 at two ends of the in-groove structure are connected with the steel rail 9 of the next section of non-transformed line by adopting a bulge clamping plate, so that the normal traffic condition can be met, and the parts, not cast with high polymer materials, of the steel rails 9 at two ends of the in-groove structure (namely the parts, not provided with the rail bearing grooves, of the steel rails 9) are fixed by a fastener 10;

t3: the following work is done during the second skylight period:

h. performing steps d-f in the step T2 (relative to the line reconstruction of the adjacent section of the step T2);

i. welding and connecting the steel rail 9 at one end of the in-groove structure in the step with the steel rail 9 at the end of the in-groove structure after the T2 transformation in the last step;

t4: the following work is done during the third skylight period:

removing fasteners 10 corresponding to rails 9 (parts corresponding to non-installed rail bearing grooves) at two ends of the in-groove structure in the steps T2 and T3, laying a groove lower cushion plate 11 in a corresponding area where the fasteners 10 are removed, and installing and fixing rail bearing grooves on the groove lower cushion plate 11 through existing sleeper bolt holes on a concrete track bed;

plugging gaps and other gaps at two ends of a rail bearing groove, mixing and stirring the components of the macromolecular damping material 5 uniformly on site, pouring the mixture into the rail bearing groove, and locking a steel rail 9 after the macromolecular damping material 5 is cured;

t5: and repeating the steps from T2 to T4 until all the line sections are transformed, namely completing all the transformation of the line section.

The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.