CN116988345A - Deviation correcting method for CRTS III type plate-type ballastless track structure - Google Patents
Deviation correcting method for CRTS III type plate-type ballastless track structure Download PDFInfo
- Publication number
- CN116988345A CN116988345A CN202311202578.0A CN202311202578A CN116988345A CN 116988345 A CN116988345 A CN 116988345A CN 202311202578 A CN202311202578 A CN 202311202578A CN 116988345 A CN116988345 A CN 116988345A
- Authority
- CN
- China
- Prior art keywords
- self
- concrete layer
- compacting concrete
- horizontal
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000011376 self-consolidating concrete Substances 0.000 claims abstract description 57
- 238000009966 trimming Methods 0.000 claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 238000002955 isolation Methods 0.000 claims abstract description 6
- 230000008439 repair process Effects 0.000 claims description 25
- 239000004567 concrete Substances 0.000 claims description 15
- 238000010146 3D printing Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 6
- 238000007639 printing Methods 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 238000007788 roughening Methods 0.000 claims description 3
- 239000003623 enhancer Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 3
- 238000005056 compaction Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004746 geotextile Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
- E01B29/06—Transporting, laying, removing or renewing sleepers
- E01B29/09—Transporting, laying, removing or renewing sleepers under, or from under, installed rails
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Machines For Laying And Maintaining Railways (AREA)
Abstract
The invention relates to the technical field of track deviation correction, in particular to a deviation correction method of a CRTS III type plate ballastless track structure, which comprises the following steps: determining horizontal and vertical deviation correcting quantity of the track structure; pulling out the steel rail, jacking and removing the track slab, and adhering to a self-compacting concrete layer below the track slab; acquiring three-dimensional size parameters of a limit block of the self-compacting concrete layer and a limit groove on a base; trimming the limit grooves on the self-compacting concrete layer limiting block and/or the base according to the three-dimensional size parameters of the horizontal deviation correcting amount, the horizontal vertical deviation correcting amount, the self-compacting concrete layer limiting block and the limit grooves on the base; an isolation layer is arranged on the surface of the base and the limit groove; and (3) moving back the track slab and the self-compacting concrete layer, recovering the steel rail, finely adjusting the fasteners, grouting the gap, and opening the line. The invention has no limit to the distance of the deviation rectifying section, the single track plate can be independently constructed, the construction efficiency is high, and the track structure performance is not affected.
Description
Technical Field
The invention relates to the technical field of track deviation correction, in particular to a deviation correction method of a CRTS III type slab ballastless track structure.
Background
The CRTS III slab ballastless track structure is a track structure which is independently researched and developed in China and consists of prefabricated track slabs, self-compacting concrete, limiting grooves, middle isolation layers (geotextiles), reinforced concrete bases and the like. The self-compaction concrete layer and the concrete base are limited in a limiting groove mode and transmit force in the longitudinal and transverse directions, and two limiting grooves are formed under each track plate.
Compared with other track structures, the ballastless track structure has the characteristics of strong integrity, high stability and good durability. However, in the long-term operation process, partial ballastless tracks of the roadbed section are easy to form offset diseases due to the change of the environment structure, so that smoothness of the line is affected, and high-speed trains of partial road sections have to operate at a limited speed. In order to solve the problem of offset damage of the ballastless track structure of the roadbed section and restore smoothness of a line, the ballastless track structure needs to be subjected to correction operation.
At present, a correction method of the ballastless track structure mostly adopts a fastener adjusting method, an integral lifting method or a rope saw cutting method; wherein: the fastener adjusting method is to adjust the ballastless track fasteners at the offset section and the two sides of the offset section in a larger range so as to achieve the purposes of downhill and line optimization. However, the transverse adjustment amount of the fastener is small, and when the offset of the ballastless track is large, the ballastless track adjusted by the fastener cannot meet the passing requirement of high-speed running. Therefore, the method is only a temporary treatment measure, and the problem of ballastless track deviation cannot be fundamentally solved.
The integral lifting method is to lift the track structure by grouting or air cushion, and is suitable for roadbed sections with sedimentation, and is not suitable for deviation correction of sections without sedimentation; for bridge tunnel sections and short distance offset sections within 15 meters, lifting and deviation correction can be greatly limited, and if the deviation correction section is too short, the track stress can become great.
And the rope saw cutting is time-consuming, and can damage the inherent structure of the III template, so that the later-stage repairability of the track is affected.
Disclosure of Invention
In order to solve the problems, the invention provides a deviation rectifying method of a CRTS III type slab ballastless track structure, which has no limitation on the distance of a deviation rectifying section, can independently construct a single track slab, has high construction efficiency and does not influence the performance of the track structure.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a deviation rectifying method of a CRTS III plate-type ballastless track structure comprises the following steps:
determining horizontal and vertical deviation correcting quantity of the track structure;
pulling out the steel rail, jacking and removing the track slab, and adhering to a self-compacting concrete layer below the track slab;
acquiring three-dimensional size parameters of a limit block of the self-compacting concrete layer and a limit groove on a base;
trimming the limit grooves on the self-compacting concrete layer limiting block and/or the base according to the three-dimensional size parameters of the horizontal deviation correcting amount, the horizontal vertical deviation correcting amount, the self-compacting concrete layer limiting block and the limit grooves on the base;
an isolation layer is arranged on the surface of the base and the limit groove;
and (3) moving back the track slab and the self-compacting concrete layer, recovering the steel rail, finely adjusting the fasteners, grouting the gap, and opening the line.
Further, the current position parameters of the track plate are obtained based on infrared light curtain scanning, so that the horizontal and vertical deviation correcting amount of the track plate is determined.
Further, three-dimensional size parameters of the limit blocks of the self-compacting concrete layer and limit grooves on the base are obtained based on infrared light curtain scanning.
Further, according to the three-dimensional size parameters of the horizontal deviation correcting amount, the horizontal vertical deviation correcting amount, the self-compacting concrete layer limiting block and the limiting groove on the base, the horizontal deviation correcting amount and/or the horizontal vertical deviation correcting amount are taken as constraint conditions, the corresponding trimming scheme is obtained with the minimum trimming workload as a target, and after trimming is completed, the horizontal deviation correcting amount and the complete deviation correcting of the horizontal deviation correcting amount can be realized through the limiting structure formed by the self-compacting concrete layer limiting block and the limiting groove on the base.
Further, trimming the self-compacting concrete layer stopper, comprising:
acquiring the size parameter of a non-overlapping area between the target limiting block model and the current self-compacting concrete layer limiting block model;
determining the repair surface of the current self-compacting concrete layer limiting block, and roughening all the repair surfaces;
printing and acquiring a repair template frame according to the size parameter of the non-overlapping area based on a 3D printing technology;
and fixing the repair template frame on the repair surface of the self-compacting concrete layer limiting block, pouring concrete, and completing maintenance of the concrete.
Further, the limit groove on the trimming base comprises:
determining position parameters and shape parameters of a chiseling area and a repairing area of the limiting groove;
printing and obtaining an integrally formed chiseled area calibration frame and a repair area pouring template frame according to the position parameters and the shape parameters based on a 3D printing technology;
fixing the chiseled area calibration frame and the repair area pouring template frame in the limiting groove, chiseling the calibrated chiseled area, and repairing the calibrated repair area;
and an elastic cushion layer is arranged around the limit groove.
Further, after the calibrated chiseled area is chiseled, a layer of epoxy mortar is sprayed or smeared with a surface enhancer to form an enhanced interface.
According to the invention, by utilizing the characteristic of the limit relation between the self-compacting concrete layer and the limit groove, the deviation correcting interface is locked on the repair of the limit block of the self-compacting concrete layer or the modification of the limit groove, so that the self-compacting concrete layer is not damaged, and meanwhile, the structural performance is not influenced;
the deviation rectifying method has no limitation on the distance of the deviation rectifying section, and the single track plate can be independently constructed, so that the construction efficiency is high;
the method can acquire the horizontal and vertical deviation correcting quantity of the track structure, the horizontal and vertical deviation correcting quantity, the three-dimensional size parameter and the position parameter of the self-compacting concrete layer limiting block and the limiting groove on the base in an omnibearing manner, so that the pertinence of the obtained deviation correcting scheme can be improved, and the subsequent deviation correcting effect is ensured.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a process flow diagram of a first embodiment of the present invention;
fig. 2 is a process flow chart of a second embodiment of the invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
Example 1
As shown in FIG. 1, the deviation rectifying method of the CRTS III type slab ballastless track structure comprises the following steps:
s1, determining horizontal and vertical deviation correction quantity of a track structure; specifically, based on infrared light curtain scanning, acquiring the current position parameter of the track plate, and taking the standard position parameter corresponding to the track plate as a comparison object to determine the horizontal and vertical deviation correction amounts of the track plate structure; because the situation of horizontal deviation correction is likely to have the situation of horizontal inclination deviation, in the embodiment, the horizontal deviation correction amount and the horizontal vertical deviation correction amount are expressed in a mode of coordinate points and corresponding horizontal deviation correction amounts and/or horizontal vertical deviation correction amounts, and the distance between two adjacent coordinate points is about 1 cm;
s2, pulling out the steel rail, jacking and removing the track slab, and adhering to a self-compacting concrete layer below the track slab;
s3, acquiring three-dimensional size parameters of a limit block of the self-compacting concrete layer and a limit groove on the base; specifically, the track plate is turned over to enable the lower bottom surface of the self-compacting concrete layer to be horizontally upwards, and three-dimensional size parameters of a limiting block of the current self-compacting concrete layer and a limiting groove on the base are obtained through infrared light curtain scanning;
s4, trimming the self-compaction concrete layer limiting block according to the three-dimensional size parameters of the horizontal and horizontal deviation correcting amount, the horizontal and vertical deviation correcting amount, the self-compaction concrete layer limiting block and the limiting groove on the base; specifically, according to the horizontal deviation correcting amount, the horizontal vertical deviation correcting amount, the self-compacting concrete layer limiting block and the three-dimensional size parameter of the limiting groove on the base, the horizontal deviation correcting amount and/or the horizontal vertical deviation correcting amount are taken as constraint conditions, a corresponding trimming scheme is obtained by taking the minimum trimming workload as a target, generally, only the limiting groove on the self-compacting concrete layer limiting block or the base is trimmed, the three-dimensional size parameter of the limiting groove on the current self-compacting concrete layer limiting block or the base is taken as a basis, the horizontal deviation correcting amount and/or the horizontal vertical deviation correcting amount are taken as constraint conditions, a limiting groove target model or a target limiting block model is obtained, then, according to the size parameter position parameter corresponding to the limiting groove target model or the target limiting groove model, the three-dimensional size parameter and the position parameter of the limiting groove on the current self-compacting concrete layer limiting block or the base are compared, and a corresponding trimming scheme is obtained, and after trimming is completed, the limiting structure formed by the self-compacting concrete layer limiting groove on the base can realize complete correction of the horizontal deviation correcting amount and the horizontal deviation correcting amount; when repairing from compact concrete layer stopper, include:
acquiring the size parameter of a non-overlapping area between the target limiting block model and the current self-compacting concrete layer limiting block model;
determining the repair surface of the current self-compacting concrete layer limiting block, and roughening all the repair surfaces;
printing and acquiring a repair template frame according to the size parameter of the non-overlapping area based on a 3D printing technology;
fixing a repair template frame on the repair surface of the self-compaction concrete layer limiting block, pouring concrete, and completing maintenance of the concrete; specifically, a paraffin layer is smeared in the repairing template frame so as to facilitate the subsequent demoulding operation, then the repairing template frame is fixed on the repairing surface of the self-compacting concrete layer limiting block, concrete pouring is carried out, the maintenance of concrete is completed, and after the maintenance is completed, demoulding is carried out;
s5, arranging an isolation layer on the surface of the base and the limit groove;
s6, moving the track slab back and self-compacting concrete layer, recovering the steel rail, fine adjusting the fastener, grouting the gap, and opening the line.
Example two
As shown in FIG. 2, the deviation rectifying method of the CRTS III type slab ballastless track structure comprises the following steps:
s1, determining horizontal and vertical deviation correction quantity of a track structure; specifically, based on infrared light curtain scanning, acquiring the current position parameter of the track plate, and taking the standard position parameter corresponding to the track plate as a comparison object to determine the horizontal and vertical deviation correction amounts of the track plate structure; because the situation of horizontal deviation correction is likely to have the situation of horizontal inclination deviation, in the embodiment, the horizontal deviation correction amount and the horizontal vertical deviation correction amount are expressed in a mode of coordinate points and corresponding horizontal deviation correction amounts and/or horizontal vertical deviation correction amounts, and the distance between two adjacent coordinate points is about 1 cm;
s2, pulling out the steel rail, jacking and removing the track slab, and adhering to a self-compacting concrete layer below the track slab;
s3, acquiring three-dimensional size parameters of a limit block of the self-compacting concrete layer and a limit groove on the base; specifically, the track plate is turned over to enable the lower bottom surface of the self-compacting concrete layer to be horizontally upwards, and three-dimensional size parameters of a limiting block of the current self-compacting concrete layer and a limiting groove on the base are obtained through infrared light curtain scanning;
s4, trimming the limiting grooves on the base according to the three-dimensional size parameters of the horizontal and horizontal deviation correcting amount, the horizontal and vertical deviation correcting amount, the self-compacting concrete layer limiting block and the limiting grooves on the base; specifically, according to the horizontal deviation correcting amount, the horizontal vertical deviation correcting amount, the self-compacting concrete layer limiting block and the three-dimensional size parameter of the limiting groove on the base, the horizontal deviation correcting amount and/or the horizontal vertical deviation correcting amount are taken as constraint conditions, a corresponding trimming scheme is obtained by taking the minimum trimming workload as a target, generally, only the limiting groove on the self-compacting concrete layer limiting block or the base is trimmed, the three-dimensional size parameter of the limiting groove on the current self-compacting concrete layer limiting block or the base is taken as a basis, the horizontal deviation correcting amount and/or the horizontal vertical deviation correcting amount are taken as constraint conditions, a limiting groove target model or a target limiting block model is obtained, then, according to the size parameter position parameter corresponding to the limiting groove target model or the target limiting groove model, the three-dimensional size parameter and the position parameter of the limiting groove on the current self-compacting concrete layer limiting block or the base are compared, and a corresponding trimming scheme is obtained, and after trimming is completed, the limiting structure formed by the self-compacting concrete layer limiting groove on the base can realize complete correction of the horizontal deviation correcting amount and the horizontal deviation correcting amount; when trimming the spacing recess on the base, include:
determining position parameters and shape parameters of a chiseling area and a repairing area of the limiting groove;
printing and obtaining an integrally formed chiseled area calibration frame and a repair area pouring template frame according to the position parameters and the shape parameters based on a 3D printing technology;
fixing the chiseled area calibration frame and the repair area pouring template frame in the limiting groove, chiseling the calibrated chiseled area, and repairing the calibrated repair area;
after chiseling off the calibrated chiseling-off area, spraying or smearing a layer of epoxy mortar by using a surface reinforcing agent to form a reinforcing interface, and arranging an elastic cushion layer around the limiting groove;
s5, arranging an isolation layer on the surface of the base and the limit groove;
s6, moving the track slab back and self-compacting concrete layer, recovering the steel rail, fine adjusting the fastener, grouting the gap, and opening the line.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the invention.
Claims (7)
1. A deviation rectifying method of a CRTS III plate-type ballastless track structure is characterized by comprising the following steps of: the method comprises the following steps:
determining horizontal and vertical deviation correcting quantity of the track structure;
pulling out the steel rail, jacking and removing the track slab, and adhering to a self-compacting concrete layer below the track slab;
acquiring three-dimensional size parameters of a limit block of the self-compacting concrete layer and a limit groove on a base;
trimming the limit grooves on the self-compacting concrete layer limiting block and/or the base according to the three-dimensional size parameters of the horizontal deviation correcting amount, the horizontal vertical deviation correcting amount, the self-compacting concrete layer limiting block and the limit grooves on the base;
an isolation layer is arranged on the surface of the base and the limit groove;
and (3) moving back the track slab and the self-compacting concrete layer, recovering the steel rail, finely adjusting the fasteners, grouting the gap, and opening the line.
2. The method for correcting the deviation of the CRTS III slab ballastless track structure of claim 1, wherein the method comprises the following steps: and acquiring the current position parameter of the track plate based on infrared light curtain scanning so as to determine the horizontal and vertical deviation correcting quantity of the track plate.
3. The method for correcting the deviation of the CRTS III slab ballastless track structure of claim 1, wherein the method comprises the following steps: and acquiring three-dimensional size parameters of the limit groove on the base from the limit block of the compact concrete layer based on infrared light curtain scanning.
4. The method for correcting the deviation of the CRTS III slab ballastless track structure of claim 1, wherein the method comprises the following steps: according to the three-dimensional size parameters of the horizontal deviation correcting amount, the horizontal vertical deviation correcting amount, the self-compacting concrete layer limiting block and the limiting groove on the base, the horizontal deviation correcting amount and/or the horizontal vertical deviation correcting amount are taken as constraint conditions, the minimum trimming workload is taken as a target to obtain a corresponding trimming scheme, and after trimming is completed, the limiting structure formed by the self-compacting concrete layer limiting block and the limiting groove on the base can realize complete correction of the horizontal deviation correcting amount and the horizontal vertical deviation correcting amount.
5. The method for correcting the deviation of the CRTS III slab ballastless track structure of claim 1, wherein the method comprises the following steps: trimming self-compacting concrete layer stopper, including:
acquiring the size parameter of a non-overlapping area between the target limiting block model and the current self-compacting concrete layer limiting block model;
determining the repair surface of the current self-compacting concrete layer limiting block, and roughening all the repair surfaces;
printing and acquiring a repair template frame according to the size parameter of the non-overlapping area based on a 3D printing technology;
and fixing the repair template frame on the repair surface of the self-compacting concrete layer limiting block, pouring concrete, and completing maintenance of the concrete.
6. The method for correcting the deviation of the CRTS III slab ballastless track structure of claim 1, wherein the method comprises the following steps: limiting grooves on the trimming base comprise:
determining position parameters and shape parameters of a chiseling area and a repairing area of the limiting groove;
printing and obtaining an integrally formed chiseled area calibration frame and a repair area pouring template frame according to the position parameters and the shape parameters based on a 3D printing technology;
fixing the chiseled area calibration frame and the repair area pouring template frame in the limiting groove, chiseling the calibrated chiseled area, and repairing the calibrated repair area;
and an elastic cushion layer is arranged around the limit groove.
7. The method for correcting the deviation of the CRTS III slab ballastless track structure of claim 1, wherein the method comprises the following steps: and after the calibrated chiseled area is chiseled, spraying or smearing a layer of epoxy mortar with a surface enhancer to form an enhanced interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311202578.0A CN116988345A (en) | 2023-09-18 | 2023-09-18 | Deviation correcting method for CRTS III type plate-type ballastless track structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311202578.0A CN116988345A (en) | 2023-09-18 | 2023-09-18 | Deviation correcting method for CRTS III type plate-type ballastless track structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116988345A true CN116988345A (en) | 2023-11-03 |
Family
ID=88530414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311202578.0A Pending CN116988345A (en) | 2023-09-18 | 2023-09-18 | Deviation correcting method for CRTS III type plate-type ballastless track structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116988345A (en) |
-
2023
- 2023-09-18 CN CN202311202578.0A patent/CN116988345A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103321111B (en) | Streetcar track connects the construction method of paving | |
| CN102182120A (en) | Precast slab type ballastless track structure | |
| CN110846958B (en) | Method for controlling construction line shape precision of ballastless track on cable-stayed bridge | |
| CN202055116U (en) | Prefabricated slab type ballastless track structure | |
| WO2011079674A1 (en) | Fine regulation method for rail board of plate type non-ballast rail | |
| CN111676742B (en) | Deviation rectifying method for CRTS III plate type ballastless track structure | |
| CN210134291U (en) | Broad structure of side of existing passenger dedicated line road bed | |
| CN105908583B (en) | System for replacing ballast track bed of tunnel with ballastless track under condition of uninterrupted driving | |
| CN112411265A (en) | Ballastless track structure suitable for large-span bridge and mounting method | |
| CN112144352A (en) | Leveling machine for leveling ultrahigh-performance concrete and application method thereof | |
| CN110424194B (en) | Prefabricated ballast bed structure of vibration isolator on bridge and construction method thereof | |
| CN104947566A (en) | Assembled grade crossing | |
| CN114293427A (en) | Novel assembling type airport pavement system setting method | |
| CN110106751A (en) | A kind of sedimentation method of adjustment suitable for II plate-type non-fragment orbit of CRTS | |
| CN101838967B (en) | Construction technology of ballast bed of bridge double-block ballastless track | |
| CN116988345A (en) | Deviation correcting method for CRTS III type plate-type ballastless track structure | |
| CN105350409A (en) | Construction method for urban rail transit long sleeper type steel spring floating slab track bed turnout | |
| CN203475251U (en) | Bridge type track | |
| CN210797616U (en) | Cast-in-place concrete base for rain and sewage pipeline | |
| CN112323654A (en) | Bridge full-prefabrication widening method | |
| WO2000001888A1 (en) | Railway system and its supporting structure, as well as their method of construction | |
| CN107988854B (en) | Later-stage reservation structure of subway upper cover vehicle base parking train inspection warehouse | |
| CN110904842A (en) | Slideway beam reaction frame for adjusting linear deviation of steel truss beam and using method thereof | |
| CN115613398A (en) | Prefabricated track structure for built-in pump house section of track traffic and construction method | |
| CN211471995U (en) | Automatic fine adjustment system for open bridge deck sleeper plate type track structure on steel truss girder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |