CN112376330A - Anti-climbing equipment for large-slope track of toothed rail railway - Google Patents
Anti-climbing equipment for large-slope track of toothed rail railway Download PDFInfo
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- CN112376330A CN112376330A CN202011370962.8A CN202011370962A CN112376330A CN 112376330 A CN112376330 A CN 112376330A CN 202011370962 A CN202011370962 A CN 202011370962A CN 112376330 A CN112376330 A CN 112376330A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/02—Tracks for rack railways
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/02—Tracks for rack railways
- E01B25/04—Rack rails; Supports or connections for rack rails
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Abstract
The invention belongs to the technical field of mountain rail traffic engineering, and particularly relates to a tooth-track railway large-slope rail anti-climbing device which comprises an embedded beam embedded in a track bed, wherein the top of the embedded beam is provided with a connecting part for connecting a rail structure, the bottom of the embedded beam is provided with an embedded column, the embedded beam and the embedded column are detachably connected, and the contact area with a rail ballast is increased through the arrangement of the embedded beam and the embedded column, so that the relative movement of the rail structure along the rail ballast can be effectively avoided, the overall climbing instability of the rail structure is avoided, the running safety of a tooth-track railway is ensured, and meanwhile, the longitudinal component of the gravity of a train and a rail system is dispersed into the rail ballast through the embedded beam and the embedded column, so that the bearing capacity of the rail structure is improved, and the stability of the rail structure is further improved.
Description
Technical Field
The invention belongs to the technical field of mountain rail traffic engineering, and particularly relates to anti-climbing equipment for a large-slope rail of a toothed rail railway.
Background
The steel sleeper toothed rail railway mainly comprises a steel sleeper, a wheel rail and a toothed rail, the locomotive is driven to advance through the wheel rail and the toothed rail, the problem that the adhesion force is insufficient in the climbing process of the locomotive can be solved, the traditional wooden sleeper and the soil sleeper are replaced by the steel sleeper, the problem that the self weight of the traditional railway is too large can be solved, the steel sleeper toothed rail railway is suitable for a large-gradient line, and the steel sleeper toothed rail railway is a novel railway traffic form commonly used in mountain scenic spots in China at present.
Compared with the traditional wheel-rail railway, the steel sleeper toothed-rail railway realizes the driving of the climbing operation of the locomotive through the meshing force between the gear and the toothed rail, the track panel consisting of the sleepers is used as an important component of the steel sleeper toothed-rail railway and is arranged on a track bed, and simultaneously plays a role in maintaining the stable structure of the wheel rail and the toothed rail, the integral structure of the ballast steel sleeper toothed-rail railway is light, the ballast is mostly made of granite rubbles and almost has no cohesive force, the loading force of the toothed-rail railway and the interaction force between ballast particles are mainly played by the friction force between the ballast and the steel sleeper and between the ballast and the track, and the sleepers are easy to lose stability due to the action of self gravity and the gravity of the track under the natural state because the sleepers are arranged on a large-gradient line, the longitudinal component force of the gravity of the train and the track system is also played in the climbing process of the locomotive, so that the condition of losing stability of the sleepers is easy to occur, the instability of the integral structure of the steel sleeper toothed rail railway is easy to occur, the creeping problem between the sleeper and the track bed and between the toothed rail and the steel sleeper occurs, and the running safety of the toothed rail railway is influenced.
Therefore, a technical scheme is urgently needed at present to solve the technical problem that the operation safety of the toothed rail railway is affected due to the fact that the conventional steel sleeper toothed rail railway is prone to creep instability.
Disclosure of Invention
The invention aims to: the anti-climbing equipment for the large-slope track of the toothed rail railway is provided for solving the technical problems that the crawling instability condition of the conventional steel sleeper toothed rail railway easily occurs and the operation safety of the toothed rail railway is influenced.
In order to achieve the purpose, the invention adopts the technical scheme that:
tooth rail railway heavy grade track rail anti-creep equipment, including pre-buried roof beam in the railway roadbed, pre-buried roof beam top is provided with the connecting portion that are used for connecting the track structure, pre-buried roof beam bottom is provided with the embedded post, the connection can be dismantled with pre-buried post to pre-buried roof beam.
According to the anti-climbing equipment for the large-slope track of the toothed rail railway, the contact area with the track ballast is increased through the arrangement of the embedded beams and the embedded columns, the relative movement of the track structure along the track ballast can be effectively avoided, the overall crawling instability of the track structure is avoided, the running safety of the toothed rail railway is ensured, meanwhile, the longitudinal component force of the gravity of a train and a track system is dispersed into the track ballast through the embedded beams and the embedded columns, the bearing capacity of the track structure is favorably improved, and the stability of the track structure under the condition of the large slope is further improved.
As a preferable scheme of the invention, the embedded beam comprises a cross beam arranged along the width direction of the rail, the cross beam is positioned between two adjacent sleepers, and the cross beam at least penetrates through the bottom of the tooth rail. The cross beam is arranged between two adjacent sleepers, bears the impact force of the train to the toothed rail along the extending direction of the rail, increases the adhesive force of the toothed rail railway along the extending direction of the rail, and avoids the phenomenon that the toothed rail climbs along the reverse direction of the advancing direction of the train.
As a preferable scheme of the invention, the end parts of the cross beam, which are positioned at two sides of the rack, are provided with the embedded columns. The embedded columns at the two ends of the beam avoid the displacement of the beam through increasing the contact area with the ballast, so that the beam can play a stabilizing role in the track structure, the track structure is prevented from crawling integrally, and on the other hand, the impact force to the track structure in the advancing process of the train is dispersed to the ballast along the beam and the embedded columns through the embedded columns, so that the bearing capacity of the track structure is improved.
As a preferable scheme of the invention, the embedded beam further comprises a longitudinal beam arranged along the extension direction of the rail, and the longitudinal beam is fixedly connected with the cross beam. The longitudinal beams and the cross beams are welded and connected to form the cross-shaped embedded beams, on one hand, the contact area of the longitudinal beams and the railway ballast is further increased, the cross beams are prevented from shifting, the operation safety of the track structure is guaranteed, on the other hand, the impact force of a train on the track structure is further dispersed, and the bearing capacity of the track structure is improved under the condition that the safety of the track structure is guaranteed.
As a preferable mode of the present invention, a blocking block is provided on a top surface of the cavity at the bottom of the sleeper, and the blocking block is used for limiting the movement of the connecting portion in the width direction of the rail. The blocking block can effectively prevent the connecting part from moving along the width direction of the track, so that the embedded beam in a connecting state with the connecting part is not easy to displace along the width direction of the track, the structural stability of the track structure in a linear running state can be guaranteed, track crawling is avoided, the impact force of a train along the width direction of the track can be shared in the track turning process, and the overall stability of the track structure on a curve of a large slope is improved.
As a preferable scheme of the present invention, an end plate is disposed at an end of the embedded column, and at least two strip-shaped holes having mutually perpendicular extension directions are disposed on the end plate. The extending direction difference in two bar holes can avoid being used for connecting the connecting bolt of pre-buried roof beam and pre-buried post and shift simultaneously, makes two connecting bolt when receiving because the train advances and the shearing force of applying, can mutually support, undertakes the impact force that the train was applyed under big slope bend state, and the stability of pre-buried roof beam structure is guaranteed to the at utmost, and then guarantees track structure's overall stability.
As a preferable scheme of the invention, the bottom of the embedded column is provided with an adjusting column, a height adjusting space is arranged between the embedded column and the adjusting column, and the height of the height adjusting space is adjustable. When the ballast height that the regulation post corresponds changes, can increase the height in space through the change, change the height of pre-buried post, make the pre-buried post that only needs to prepare same length, at the scene according to the big sloping way on the ballast thickness, through the pre-buried degree of depth of the pre-buried roof beam of regulation post adjustment, reduce the cost of manufacture and the construction cost of this anti-creep equipment, realize this anti-creep equipment and the unanimous adaptability of environment, enlarge its application scope, make things convenient for the construction setting of anti-creep equipment.
As a preferable scheme of the invention, the bottom of the adjusting column is provided with an anchor bolt, and the adjusting column is anchored in the structural building. The structure building comprises existing structure buildings such as a roadbed, a bridge and a tunnel, the adjusting columns are anchored in the existing structure buildings, the stable structure of the adjusting columns can be guaranteed, and the stable structure of the embedded columns is further guaranteed.
As a preferable aspect of the present invention, the connecting portion is detachably connected to the rack. Connecting portion are direct to be connected with the cogged rail, directly improve the anticreep effect of cogged rail, make the cogged rail railway climb the in-process and directly transmit the anticreep equipment through the cogged rail with the engaging force of cogged rail on, make the anticreep effect better, guarantee the stability in the cogged rail use, and then realize the improvement to track structure's overall stability effect and bearing capacity.
In a preferred embodiment of the invention, the connecting part is adapted to the sleeper bottom cavity. Adopt the mode installation anti-creep equipment that connecting portion and sleeper bottom die cavity are connected, with train climbing process to the transmission back to anti-creep equipment of track structure's impact force through cogged rail, sleeper, avoid the sleeper along the removal of railway ballast, guarantee track structure's overall stability, and the setting that anti-creep equipment is whole buried underground can not influence existing track structure's outward appearance shape, can realize the stealthy installation of anti-creep structure.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. through the arrangement of the embedded beams and the embedded columns, the contact area between the embedded beams and the railway ballast is increased, the relative movement of the track structure along the railway ballast can be effectively avoided, the overall crawling instability of the track structure is avoided, and the running safety of the toothed rail railway is ensured;
2. because the longitudinal component of the gravity of the train and the track system is dispersed into the railway ballast through the embedded beam and the embedded column, the bearing capacity of the track structure is improved, and the stability of the track structure is further improved.
Drawings
FIG. 1 is a schematic structural view of a large-ramp track anti-creep device of a toothed rail railway according to embodiment 1;
FIG. 2 is a schematic structural view of the embedded column described in example 1;
FIG. 3 is a schematic structural view of the sleeper described in example 1;
FIG. 4 is a first diagram showing the effect of the implementation of the anti-climbing device for a large-slope railway track of a toothed rail railway in the embodiment 1;
FIG. 5 is a second diagram showing the effect of the implementation of the anti-climbing device for the large-slope railway track of the toothed rail railway in the embodiment 1;
fig. 6 is a top view of the tooth rail railway large-grade rail anticreeper of embodiment 2;
fig. 7 is a front view of the tooth rail railway large-grade rail anticreeper of embodiment 3;
FIG. 8 is a schematic view of the end plate of the present invention;
FIG. 9 is a diagram showing effects of the implementation of the anti-climbing device for a large-slope railway track of a toothed rail railway in embodiment 4;
icon: 1-track bed, 2-embedded beam, 21-cross beam, 22-longitudinal beam, 3-connecting part, 4-track structure, 41-sleeper, 42-tooth rail, 43-steel rail, 5-embedded column, 6-blocking block, 7-end plate, 71-strip hole, 8-adjusting column, 81-anchor bolt and 9-heightening space.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1-5, tooth rail railway heavy grade railway track anti-creep equipment, including pre-buried roof beam 2 of pre-buried in railway roadbed 1, 2 tops of pre-buried roof beam are provided with connecting portion 3 that is used for connecting the track structure, pre-buried roof beam 2 includes the crossbeam 21 that sets up along track width direction, crossbeam 21 is located between two adjacent sleepers 41, crossbeam 21 passes tooth rail 42 bottom at least, the tip that crossbeam 21 is located tooth rail 42 both sides all is provided with pre-buried post 5, connection can be dismantled to pre-buried roof beam 2 and pre-buried post 5.
The anti-climbing equipment for the large-slope track of the toothed rail railway of the embodiment, the embedded beam 2 is horizontally installed, the embedded column 5 is vertically installed, the embedded beam 2 and the embedded column 5 are detachably connected through bolts, nuts, gaskets and elastic pads, the track structure 4 comprises a sleeper 41, steel rails 43 and a toothed rail 42 arranged between the two steel rails 43, a cross beam 21 is laid at intervals of 20m along the extension direction of the toothed rail 42, the cross beam 21 is an H-shaped steel component or a channel steel component, the embedded column 5 is an H-shaped steel component, so that the embedded beam 2 and the embedded column 5 are connected with the track structure 4 of a frame type structure, the creeping problem between the steel sleeper, the toothed rail 42 and the track bed 1 is effectively solved, the running safety of the toothed rail railway is ensured, and meanwhile, due to the improvement of the stability of the track structure 4, the corresponding bearing capacity and the adaptability to the slope of the track structure 4 can be improved, and the arrangement of the cross beam 21 along the width direction of the track can improve the adhesive force of the track structure 4 along the width direction of the track, improve the stability of the track structure 4 in a turning state, ensure that the track structure 4 can adapt to the stable and safe operation of a large slope and a turning route, and correspondingly improve the bearing capacity of the track structure 4 to trains.
Preferably, the connecting portion 3 is detachably connected to the rack 42.
The big slope track anti-creep equipment of cogged rail railway of this embodiment, it is preferred connecting portion 3 are two L shaped steel members, crossbeam 21 is channel-section steel member, pre-buried post 5 is H shaped steel member, 5 lateral walls of pre-buried post set up two extending direction mutually perpendicular's bar hole 71, and pre-buried post 5 stretches into in the crossbeam 21 of channel-section steel member, with crossbeam 21 bolted connection, connecting portion 3 is connected with cogged rail 42 lateral wall and steel sleeper through bolted connection's mode, directly improves the anti-creep effect of cogged rail 42, guarantees the stability in the cogged rail 42 use, and then realizes the improvement to the overall stability effect and the bearing capacity of track structure 4.
Preferably, a blocking block 6 is arranged on the top surface of the cavity at the bottom of the sleeper 41, and the blocking block 6 is used for limiting the movement of the connecting part 3 along the width direction of the track.
Specifically, in this embodiment, a rectangular hole is formed in the sleeper 41 for installing a connecting bolt, the blocking blocks 6 are welded to two sides of the rectangular hole along the length direction of the sleeper 41, so that the movement of the connecting bolt along the width direction of the track is limited by the blocking blocks 6, the embedded beam 2 is not easy to displace along the width direction of the track, stable connection between the anti-climbing device and the track structure 4 is ensured, and the method is not only beneficial to improving the overall stability of the track structure 4 and the bearing capacity of the track structure 4, but also beneficial to improving the adaptability of the track structure 4 to the curve line.
Example 2
As shown in fig. 6 to 9, the anti-climbing device for a large-slope rail of a rack-rail railway of the present embodiment has the same structure as that of embodiment 1, except that: the embedded beam 2 comprises a longitudinal beam 22 arranged along the extension direction of the track, and the longitudinal beam 22 is fixedly connected with the cross beam 21.
The big slope track of cogged rail railway track anti-creep equipment of this embodiment, longeron 22 is H shaped steel component, crossbeam 21 also is H shaped steel component, adopts the welded mode to form the cross structure, buries underground in the railway roadbed 1 of sleeper 41 bottom, all can set up pre-buried post 5 bottom crossbeam 21 and longeron 22, set up connecting portion 3 at longeron 22 top, further increase the area of contact of anti-creep equipment and railway roadbed 1 railway ballast, avoid crossbeam 21 to shift, guarantee track structure 4's operational safety, further dispersion train is to track structure 4's impact force, improve track structure 4's bearing capacity under the circumstances of guaranteeing track structure 4 security.
Preferably, an end plate 7 is arranged at the end of the embedded column 5, and at least two strip-shaped holes 71 with mutually perpendicular extending directions are arranged on the end plate 7.
Specifically, in this embodiment 5 tip of embedded column adopts the welded mode to set up end plate 7, sets up two bar holes 71 on the end plate 7, two bar holes 71's extending direction mutually perpendicular, bar hole 71 can be the slot type hole, also can be the quad slit, realizes being connected of embedded column 5 and buried beam 2 through the connecting bolt who wears to establish in bar hole 71, when making between buried beam 2 and the buried column 5 because the train advances and produce the shearing force, two connecting bolt can cooperate, guarantee buried beam 2 and the fixed of 5 relative position of buried column, and then guarantee the stable in structure of anti-creep equipment, realize the stable effect to track structure 4.
Example 3
As shown in fig. 1 to 9, the anti-climbing device for a large-slope rail of a toothed rail railway of the present embodiment has the same structure as that of embodiment 2, except that: the embedded column 5 bottom is provided with adjusts post 8, embedded column 5 with it increases space 9 to adjust to be provided with between the post 8, it is adjustable to increase space 9 height, it is provided with crab-bolt 81 to adjust 8 bottoms of post, it anchors in structural building to adjust 8 anchors of post.
In the anti-climbing device for a large-slope rail of a toothed rail railway in the embodiment, preferably, the embedded column 5 is an H-shaped steel member, the adjusting column 8 is an H-shaped steel member, end plates 7 are welded on the corresponding end surfaces of the embedded columns 5 and the adjusting columns 8, strip-shaped holes 71 are arranged, the height-adjusting space 9 is formed between the embedded columns 5 and the adjusting columns 8 through bolt support, the adjusting columns 8 are fixedly connected with an existing roadbed, a bridge and a tunnel in a mode of fixing anchor bolts 81, the embedded columns 5 and the adjusting columns 8 are connected in a bolt connection mode, can change the length that forms the bolt of increaseing space 9 according to the 1 high needs of ballast bed, change and increase space 9 height, realize the adjustment of 5 top positions of pre-buried post and 4 relative positions of track structure, make the anti-creep equipment of this structure easily process more, can adjust according to actual construction conditions, reduce the tooth rail railway system construction cost.
Preferably, the heightening space 9 is filled with the railway ballast, so that the structural strength of the embedded column 5 can be ensured, the contact area between the anti-creep equipment and the railway ballast is further increased, the dispersion of the running load of the upper toothed rail railway and the train is realized, the running safety and stability of the toothed rail railway are ensured, and the bearing capacity of the track structure is improved.
Preferably, a filling backing plate is arranged in the heightening space 9, so that the structural strength of the embedded column 5 is ensured through a steel structure backing plate.
Example 4
As shown in fig. 6 to 9, the anti-climbing device for a large-slope rail of a rack-rail railway of the present embodiment has the same structure as that of embodiment 3, except that: the connecting part 3 is matched with a bottom cavity of the sleeper 41.
The big slope track anti-creep equipment of cogged rail railway of this embodiment, it is preferred connecting portion 3 is the heterotypic structure of L shaped steel component cutting formation, have with the connection face of sleeper 41 bottom die cavity adaptation and with the connection face of crossbeam 21 or longeron 22 top surface adaptation, make through setting up connecting portion 3 embedding in sleeper 41 bottom die cavity, through the welded connection of connecting portion 3 and sleeper 41 or through the effect of stopping that blocks 6, it is fixed to realize sleeper 41 and connecting portion 3's relative position, avoid the removal of sleeper 41 along railway roadbed 1 railway ballast, guarantee track structure 4's overall stability, and the setting of anti-creep equipment does not influence existing track structure 4's outward appearance shape, can realize the stealthy installation of anti-creep structure.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The anti-climbing equipment for the large-slope track of the toothed rail railway is characterized in that: including pre-buried roof beam (2) of pre-buried in ballast bed (1), pre-buried roof beam (2) top is provided with connecting portion (3) that are used for connecting track structure (4), pre-buried roof beam (2) bottom is provided with embedded post (5), connection can be dismantled with embedded post (5) to pre-buried roof beam (2).
2. The anti-climbing device for a large-slope railway track of a toothed rail according to claim 1, characterized in that the embedded beam (2) comprises a cross beam (21) arranged along the width direction of the track, the cross beam (21) is positioned between two adjacent sleepers (41), and the cross beam (21) penetrates at least the bottom of the toothed rail (22).
3. The anti-creep device for a large-slope railway track with a toothed rail according to claim 2, characterized in that the ends of the cross beam (21) on both sides of the toothed rail (22) are provided with the embedded columns (5).
4. The anti-climbing equipment for the large-slope railway track of the toothed rail railway according to claim 3, wherein the embedded beam (2) further comprises a longitudinal beam (22) arranged along the extending direction of the track, and the longitudinal beam (22) is fixedly connected with the cross beam (21).
5. The anti-creep apparatus for a large-slope rail of a toothed rail railway according to claim 2, wherein the top surface of the cavity at the bottom of the sleeper (41) is provided with a block (6), and the block (6) is used for limiting the movement of the connecting part (3) along the width direction of the rail.
6. The anti-creep device for a rack-rail railway large-slope rail according to any one of claims 1 to 5, characterized in that the end of the embedded column (5) is provided with an end plate (7), and the end plate (7) is provided with at least two strip-shaped holes (71) with mutually perpendicular extending directions.
7. The anti-climbing device for a large-slope railway of a toothed rail railway according to claim 6, characterized in that an adjusting column (8) is arranged at the bottom of the embedded column (5), a height adjusting space (9) is arranged between the embedded column (5) and the adjusting column (8), and the height of the height adjusting space (9) is adjustable.
8. The anti-creep device for a large-slope railroad track according to claim 7, wherein the bottom of the adjusting column (8) is provided with an anchor bolt (81), and the adjusting column (8) is anchored in the structural building.
9. A tooth-track railway heavy-grade rail anti-climb device according to claim 5, characterized in that said connection part (3) is detachably connected with the tooth track (42).
10. The anti-creep device for a large-slope railway track of a toothed rail according to claim 5, characterized in that the connection part (3) is adapted to the bottom cavity of the sleeper (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011370962.8A CN112376330A (en) | 2020-11-30 | 2020-11-30 | Anti-climbing equipment for large-slope track of toothed rail railway |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011370962.8A CN112376330A (en) | 2020-11-30 | 2020-11-30 | Anti-climbing equipment for large-slope track of toothed rail railway |
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| CN112376330A true CN112376330A (en) | 2021-02-19 |
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| CN202011370962.8A Pending CN112376330A (en) | 2020-11-30 | 2020-11-30 | Anti-climbing equipment for large-slope track of toothed rail railway |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112962367A (en) * | 2021-02-24 | 2021-06-15 | 中铁二院工程集团有限责任公司 | Construction method of tooth-track railway ballast track system |
| CN113215871A (en) * | 2021-04-12 | 2021-08-06 | 中铁二院工程集团有限责任公司 | Toothed rail fastener system for concrete sleeper |
| CN113215872A (en) * | 2021-04-12 | 2021-08-06 | 中铁二院工程集团有限责任公司 | Rack structure for toothed rail railway and fastener system thereof |
| CN114318967A (en) * | 2022-01-05 | 2022-04-12 | 中铁二院工程集团有限责任公司 | Ballastless track tooth track connecting system for large-gradient simply-supported bridge |
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| CN112962367A (en) * | 2021-02-24 | 2021-06-15 | 中铁二院工程集团有限责任公司 | Construction method of tooth-track railway ballast track system |
| CN112962367B (en) * | 2021-02-24 | 2023-03-17 | 中铁二院工程集团有限责任公司 | Construction method of tooth-track railway ballast track system |
| CN113215871A (en) * | 2021-04-12 | 2021-08-06 | 中铁二院工程集团有限责任公司 | Toothed rail fastener system for concrete sleeper |
| CN113215872A (en) * | 2021-04-12 | 2021-08-06 | 中铁二院工程集团有限责任公司 | Rack structure for toothed rail railway and fastener system thereof |
| CN113215871B (en) * | 2021-04-12 | 2022-12-27 | 中铁二院工程集团有限责任公司 | Toothed rail fastener system for concrete sleeper |
| CN114318967A (en) * | 2022-01-05 | 2022-04-12 | 中铁二院工程集团有限责任公司 | Ballastless track tooth track connecting system for large-gradient simply-supported bridge |
| CN114318967B (en) * | 2022-01-05 | 2023-07-18 | 中铁二院工程集团有限责任公司 | Tooth rail connecting system for ballastless track of heavy-gradient simply-supported bridge |
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