阅读说明：本技术 一种crtsⅲ型板式无砟轨道结构的纠偏方法 (Deviation rectifying method for CRTS III plate type ballastless track structure ) 是由 刘竞 郑新国 潘永健 蔡德钩 谢永江 姚建平 楼梁伟 石越峰 杨德军 刘相会 曾 于 2020-01-13 设计创作，主要内容包括：本发明公开了一种CRTSⅢ型板式无砟轨道结构的纠偏方法,确定轨道结构的横向纠偏量；拨开钢轨,顶升并移开轨道板及粘附于轨道板下方的自密实混凝土层；根据横向纠偏量,修整底座上的限位凹槽；在底座表面及修整后的限位凹槽上设置隔离层；移回轨道板和自密实混凝土层,恢复钢轨并精调扣件,离缝注浆,开通线路。本发明将纠偏界面设置在自密实混凝土层与底座之间,根据设计纠偏量修整限位凹槽,不破坏自密实混凝土层,避免重新灌注；新设置的隔离层有效恢复了原轨道结构而不影响无砟轨道的再维修性；同时,对纠偏区段距离没有限制,单块轨道板可独立施工,且纠偏作业对轨道高程影响较小,施工效率高,适合天窗施工。(The invention discloses a correction method of a CRTS III slab ballastless track structure, which comprises the steps of determining the transverse correction amount of the track structure; pulling the steel rail open, jacking and moving away the track plate and the self-compacting concrete layer adhered below the track plate; trimming a limiting groove on the base according to the transverse deviation correction amount; arranging isolation layers on the surface of the base and the trimmed limiting groove; and moving back the track slab and the self-compacting concrete layer, recovering the steel rail, finely adjusting the fastener, performing open joint grouting, and opening the line. According to the invention, the deviation rectifying interface is arranged between the self-compacting concrete layer and the base, and the limiting groove is trimmed according to the designed deviation rectifying amount, so that the self-compacting concrete layer is not damaged, and the re-pouring is avoided; the newly arranged isolation layer effectively restores the original track structure without influencing the repairability of the ballastless track; meanwhile, the distance of the deviation rectifying section is not limited, a single track plate can be independently constructed, the influence of deviation rectifying operation on the track elevation is small, the construction efficiency is high, and the method is suitable for skylight construction.)

1. A deviation rectifying method for a CRTS III slab ballastless track structure is characterized by comprising the following steps:

determining the transverse deviation correction amount of the track structure;

pulling out the steel rail, jacking and removing the track plate and the self-compacting concrete layer adhered below the track plate;

trimming a limiting groove on the base according to the transverse deviation correction amount;

arranging isolation layers on the surface of the base and the trimmed limiting groove;

and moving back the track slab and the self-compacting concrete layer, recovering the steel rail, finely adjusting the fastener, performing open joint grouting, and opening the line.

2. The method of claim 1, wherein the trimming of the retaining groove in the base comprises:

calibrating a chiseling area and a repairing area of the limiting groove according to the transverse deviation correction amount;

chiseling the calibrated chiseling area and repairing the calibrated repairing area;

and arranging an elastic cushion layer around the limiting groove to enable the shape and the size of the trimmed limiting groove to be the same as those of the original limiting groove.

3. The method of claim 2 wherein the calibrated chiseled area is chiseled and then an epoxy mortar layer is sprayed or applied with a surface enhancing agent to form the enhanced interface.

4. The method of claim 2, wherein the calibrated repair area is repaired using an early strength rapid hardening mortar.

5. The method for correcting errors according to claim 4, wherein the setting time of the early strength rapid hardening mortar is not more than 30 min.

6. The deviation rectifying method according to claim 1, wherein the area of the isolation layer is larger than the area of the rail plate after being replaced, and the thickness is 0.1mm to 4 mm.

7. The deviation rectifying method according to claim 1 or 6, wherein the insulation layer is formed by painting, rolling or spraying insulation material, or laying non-woven fabric with geomembrane.

8. The method of rectifying deviation of claim 7, wherein the insulation material comprises one of a bitumen coating, a polyurethane coating, and a polyurea coating.

9. The method of claim 8 wherein the setting time of the insulation material is no more than 2 hours.

10. The deviation rectifying method according to claim 1, wherein the gap grouting is performed between a self-compacting concrete layer and a newly-arranged isolation layer;

and the steel rail recovery and fine adjustment of the fastener are carried out synchronously with the gap grouting.

Technical Field

The invention relates to the technical field of track deviation correction, in particular to a deviation correction method of a CRTS III plate type ballastless track structure.

Background

The CRTS III slab ballastless track structure is a track structure independently researched and developed in China, wherein a self-compacting concrete layer is laid under a track slab, the designed thickness of the self-compacting concrete layer is 90mm, the length and the width of the self-compacting concrete layer are opposite to those of the track slab, a single-layer reinforcing mesh is adopted for reinforcing bars, and reinforcing mesh sheets are connected with reserved door-shaped bars of the track slab; the self-compacting concrete layer and the concrete base are limited and transmit longitudinal and transverse forces in a limiting groove mode, two limiting grooves are arranged under each track plate, the size of each groove is 700mm multiplied by 1000mm, reinforcing steel bars are additionally arranged at the limiting grooves, and elastic cushion layers are arranged around (on the side faces of) the limiting grooves; set up middle isolation layer (geotechnological cloth) between self-compaction concrete and base, self-compaction concrete layer reserves the filling hole through the track board and fills and form. The CRTS III ballastless track is mainly applied to special purpose of adult runchant, urban area of Wuhan city, special purpose of tray camp passenger, irrigation line, special purpose of Shendan, special purpose of Jingshen guest, Zheng Xugao iron and the like.

The high-speed railway has the characteristics of high smoothness and high stability, and compared with other track structures, the ballastless track structure has the characteristics of strong integrity, high stability and good durability. However, in China, geological conditions are various, environmental conditions are complex and changeable, and the ballastless track structures of the roadbed sections of part of the operation line have deviation diseases, so that the smoothness of the line is influenced, and high-speed trains of part of the sections have to run at limited speed. In order to solve the problem of deviation of a ballastless track structure of a roadbed section and recover the smoothness of a line, the ballastless track structure needs to be subjected to deviation rectification operation.

At present, a fastener adjusting method, an integral lifting method or a wire saw cutting method is mostly adopted for solving the problem of track deviation caused by deformation of a high-speed railway roadbed; wherein:

the fastener adjusting method is used for adjusting ballastless track fasteners in the offset section and the two sides of the offset section within a larger range, so that the purposes of downslope and line shape optimization are achieved. However, the transverse adjustment amount of the fastener is small, the down slope distance of two sides of the offset section is long, the daily maintenance difficulty is large, when the offset of the ballastless track is large, the ballastless track adjusted by the fastener cannot meet the passing requirement of high-speed driving, the speed is limited, and the normal operation of the high-speed railway is seriously influenced. The method is only a temporary treatment measure and cannot fundamentally solve the problem of ballastless track deviation.

The integral lifting method is to lift the track structure by grouting or an air cushion; for example, the prior patent (application No. 201710013063.4) discloses a "ballastless track grouting lifting and lifting deviation rectifying method", which lifts the whole track structure in a grouting manner, chisels off the sealing layers on both sides of the line, and then rectifies the deviated part. However, the method can cause the elevation of the track to be increased, is only suitable for subgrade sections with settlement and is not suitable for deviation correction of non-settlement sections; for the bridge tunnel section and the short-distance deviation section within 15 meters, the lifting deviation correction can be greatly limited, and if the deviation correction section is too short, the track stress can become large.

Meanwhile, the cutting of the wire saw consumes time, and the inherent structure of the III type plate can be damaged, so that the later repairability of the track is influenced.

Disclosure of Invention

Aiming at the defects in the technical problems, the invention provides a correction method of a CRTS III plate type ballastless track structure.

The invention discloses a correction method of a CRTS III plate type ballastless track structure, which comprises the following steps:

determining the transverse deviation correction amount of the track structure;

pulling out the steel rail, jacking and removing the track plate and the self-compacting concrete layer adhered below the track plate;

trimming a limiting groove on the base according to the transverse deviation correction amount;

arranging isolation layers on the surface of the base and the trimmed limiting groove;

and moving back the track slab and the self-compacting concrete layer, recovering the steel rail, finely adjusting the fastener, performing open joint grouting, and opening the line.

As a further improvement of the present invention, the limiting groove on the trimming base comprises:

calibrating a chiseling area and a repairing area of the limiting groove according to the transverse deviation correction amount;

chiseling the calibrated chiseling area and repairing the calibrated repairing area;

and arranging an elastic cushion layer around the limiting groove to enable the shape and the size of the trimmed limiting groove to be the same as those of the original limiting groove.

As a further improvement of the invention, after the nominal chiseled area is chiseled, a layer of epoxy mortar is sprayed or smeared with the surface reinforcing agent to form a reinforced interface.

As a further improvement of the invention, the calibrated repair area is repaired by using early-strength rapid-hardening mortar.

As a further improvement of the invention, the setting time of the early-strength rapid-hardening mortar is not more than 30 min.

As a further improvement of the invention, the area of the isolating layer is larger than the area of the track plate after being put back, and the thickness of the isolating layer is 0.1 mm-4 mm.

As a further improvement of the invention, the barrier layer is formed by painting, rolling or spraying a barrier material, or laying a non-woven fabric with geomembrane.

As a further improvement of the invention, the barrier material comprises one of a bitumen coating, a polyurethane coating and a polyurea coating.

As a further development of the invention, the setting time of the insulating material does not exceed 2 h.

As a further improvement of the method, the open joint grouting is conducted between a self-compacting concrete layer and a newly arranged isolation layer;

and the steel rail recovery and fine adjustment of the fastener are carried out synchronously with the gap grouting.

Compared with the prior art, the invention has the beneficial effects that:

1. the correction method utilizes the structural advantages of the CRTS III slab ballastless track structure, the correction interface is arranged between the self-compacting concrete layer and the base, the limit groove is trimmed according to the designed correction amount, the self-compacting concrete layer is not damaged, the re-pouring is avoided, and the structural performance is not influenced;

2. the correction method can avoid the integral lifting of the track structure, and has little influence on the track elevation after correction is finished, and the track elevation is not more than 4 mm;

3. the deviation rectifying method has no limit on the distance of the deviation rectifying section, the single track slab can be independently constructed, the construction efficiency is high, and the method is suitable for skylight construction;

4. the deviation rectifying method ensures separability between the self-compacting concrete layer and the base during subsequent repair by resetting the isolation layer, and realizes continuous repairability of the track structure.

Drawings

Fig. 1 is a schematic deviation rectification diagram of a CRTS iii slab ballastless track structure disclosed in an embodiment of the present invention; fig. 2 is a flowchart of a deviation rectifying method for a CRTS iii slab ballastless track structure according to an embodiment of the present invention.

In the figure:

1. a track plate; 2. a self-compacting concrete layer; 3. a base; 4. a limiting groove; 5. an isolation layer; 6. correcting the center line of the front track; 7. correcting the center line of the track; 8. chiseling the area; 9. repairing the area; 10. enhancing the interface.

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. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The invention is described in further detail below with reference to the attached drawing figures:

as shown in fig. 1 and 2, the invention provides a deviation rectifying method for a CRTS iii slab ballastless track structure, wherein:

as shown in fig. 1, the CRTS iii slab ballastless track structure of the present invention sequentially includes a track slab 1, a self-compacting concrete layer 2 and a base 3 from top to bottom, wherein the self-compacting concrete layer 2 is formed by pouring through a pouring hole reserved on the track slab 1, and then the track slab 1 and the self-compacting concrete layer 2 are fixed as a whole; carry out horizontal fore-and-aft spacing between self-compaction concrete layer 2 and the base 3, be equipped with spacing recess 4 on the base 3 promptly, self-compaction concrete layer 2 forms spacing arch in the position of the corresponding spacing recess 4 of filling, realizes horizontal fore-and-aft spacing between self-compaction concrete layer 2 and the base 3 through spacing arch and spacing recess 4's cooperation. Simultaneously, for the convenience of follow-up when restoreing separation of self-compaction concrete layer 2 and base 3, set up the isolation layer (not shown in the figure) between self-compaction concrete layer 2 and base 3, this isolation layer adhesion is at self-compaction concrete layer 2 when self-compaction concrete layer 2 separates with base 3, is different from newly-increased isolation layer 5 that figure 1 reference numeral 5 pointed.

As shown in fig. 2, based on the CRTS iii slab ballastless track structure shown in fig. 1, the deviation rectification method of the invention includes:

step 1, measuring a mark, and determining the transverse deviation correction amount of a track structure; wherein the content of the first and second substances,

measuring and recording the original elevation of the track by using a high-precision leveling instrument, measuring and recording the center line position of the track by using a total station, calibrating the current edge position of the track slab by using a marker pen, and determining the transverse deviation correction amount as the transverse distance between the center line 6 of the track before deviation correction and the center line 7 of the track after deviation correction;

step 2, pulling off the steel rail; wherein the content of the first and second substances,

and dismantling the rail fasteners in a certain range in front of and behind the deviation correcting point, lifting and propping the steel rail to two sides of the rail plate 1 to expose the rail plate 1, and stabilizing by using the cushion blocks and the support rods to prevent sliding.

Step 3, jacking and removing the track slab 1 and the self-compacting concrete layer 2 adhered below the track slab 1 to expose the base 3; wherein the content of the first and second substances,

the track slab 1 and the self-compacting concrete layer 2 which are fixed into a whole are hoisted and carried away by a hoisting plate trolley, and the slab lower base 3 is exposed.

Step 4, trimming a limiting groove 4 on the base 3 according to the transverse deviation correction amount determined in the step 1; wherein the content of the first and second substances,

the method for trimming the limiting groove 4 on the base 3 comprises the following steps:

calibrating a chiseling area 8 and a repairing area 9 of the limiting groove 4 according to the transverse deviation correction amount;

chiseling the calibrated chiseling area 8, and spraying or smearing a layer of epoxy mortar on the exposed chiseling surface by using a surface reinforcing agent to form a reinforcing interface 10 so as to protect the internal steel bars from being rusted;

repairing the calibrated repairing area 9 by using early-strength rapid-hardening mortar, wherein the setting time of the early-strength rapid-hardening mortar is preferably not more than 30 min;

and arranging an elastic cushion layer around a new limiting groove formed after chiseling and repairing, wherein the shape and the size of the modified limiting groove are the same as those of the original limiting groove.

Step 5, arranging an isolation layer 5 on the surface of the base 3 and the trimmed limit groove; wherein the content of the first and second substances,

arranging an isolation layer 5 by using isolation materials or non-woven fabrics with geomembranes, wherein the area of the isolation layer is larger than that of the area of the track slab after the track slab is put back; the isolation material can be an asphalt coating, a polyurethane coating or a polyurea coating, preferably has the setting time of not more than 2 hours, and can be brushed, rolled or sprayed; the thickness of the coating is 0.1 mm-4 mm, and the coating is uniformly coated; and calibrating the edge position of the track slab by using a marker pen according to the designed deviation correction amount.

Step 6, arranging the track slab 1; wherein the content of the first and second substances,

and moving the lifted track slab 1 and the self-compacting concrete layer 2 adhered below the track slab 1 back according to the calibrated position, and monitoring the track central line by a total station and carrying out proper fine adjustment in the moving-back process.

Step 7, repairing the gap; wherein the content of the first and second substances,

and (3) performing gap grouting between the self-compacting concrete layer 2 and the newly arranged isolation layer 5 by using a low-viscosity resin material to ensure that the track structure is compactly attached together.

Step 8, cleaning the site; wherein the content of the first and second substances,

the rail falls back and the fastener is finely adjusted to restore the smoothness of the line.

Further, in order to ensure the sunroof operation, the above steps 6 and 7 may be performed simultaneously.

The invention has the advantages that:

1. the correction method utilizes the structural advantages of the CRTS III slab ballastless track structure, the correction interface is arranged between the self-compacting concrete layer and the base, the limit groove is trimmed according to the designed correction amount, the self-compacting concrete layer is not damaged, the re-pouring is avoided, and the structural performance is not influenced;

2. the correction method can avoid the integral lifting of the track structure, and has little influence on the track elevation after correction is finished, and the track elevation is not more than 4 mm;

3. the deviation rectifying method has no limit on the distance of the deviation rectifying section, the single track slab can be independently constructed, the construction efficiency is high, and the method is suitable for skylight construction;

4. the deviation rectifying method ensures separability between the self-compacting concrete layer and the base during subsequent repair by resetting the isolation layer, and realizes continuous repairability of the track structure.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.