Embedded rail structure compatible with fastener fixing steel rail and rail replacing method

Abstract

The invention discloses an embedded track structure compatible with fasteners for fixing steel rails and a track changing method, the embedded track structure comprises track bearing grooves cast in a track bed in situ and the steel rails arranged in the track bearing grooves, and when any steel rail is fixed in the corresponding track bearing groove in a discrete locking state, the steel rails are fixed through a plurality of fastener elastic strips arranged on the two sides of the steel rails; each fastener elastic strip is fixed to the bottom of the corresponding rail bearing groove through an anchor bolt. And the rail bottom of each steel rail is provided with a gauge block corresponding to the corresponding fastener elastic strip at the position of the corner angle formed by the upper surface and the side surface. When the rails are replaced, the temporary steel rails are fixedly locked through the fastener elastic strips so as to meet the traffic requirement, and when the lines are idle, new steel rails are constructed to be fixed in the corresponding rail bearing grooves in a continuous locking state. According to the invention, the rail changing operation is completed in different skylight time stages, so that the flexibility and convenience of embedded rail maintenance are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit construction, and in particular to an embedded rail structure compatible with fasteners for fixing rails and a rail changing method. Background Art

[0002] As urban rail transit continues to develop steadily, the scale of the network and passenger flow continue to increase, and rail transit is in the stage of gradually entering a stage of high-quality development from high-speed development.

[0003] As a new type of track structure, the embedded continuous support fastenerless track system (referred to as embedded track) has the characteristics of vibration and noise reduction, low wheel-rail wear, less maintenance and repair, and green environmental protection compared to the traditional fastener sleeper ballastless track structure of the subway. In recent years, this technology has been gradually applied in domestic subway and tram projects.

[0004] Among them, the usual structure of the fastener track system is: the fastener track is composed of rails, fasteners (sleepers), ballast and other parts. The rails are usually fixed by the fastener system, which can transmit the vertical force, longitudinal force and lateral force from the rails, and play the role of connecting the rails and the structure under the rail.

[0005] Fastener track is the track structure type commonly used in subways.

[0006] The general structure of the embedded track system is as follows: the embedded track consists of rails, elastic constraint structures, rail adjustment components, rail bearing grooves, ballast, adjustment layers, etc. Compared with the traditional fastener-type track, the main technical feature of the embedded track is that the rails are locked by polymer castables to achieve elastic continuous support, thereby obtaining a better wheel-rail relationship, thereby reducing wheel-rail wear and vibration transmission.

[0007] In the industry, some professional organizations have proposed improving the dynamic performance of the track structure by changing the way of locking the rails, but this solution also brings difficulties to maintenance and track replacement operations during actual use.

[0008] Because the track replacement process of the embedded track system generally includes the following steps: cutting and cleaning the polymer filling material → sawing off the old rail → replacing the new rail → welding the steel rail → fine-tuning the rail → pouring the polymer material and re-locking it.

[0009] Among them, for maintenance and track replacement, the main problem is that the nighttime maintenance window time is limited after the subway is shut down, while the time required for the polymer materials to solidify during the "cutting filling materials" and "re-locking the rails" process is relatively long, which leads to hasty actual maintenance work and lack of flexibility.

[0010] Therefore, how to solve the problem of difficult maintenance and inconvenience of track replacement of embedded tracks has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0011] In view of the above-mentioned defects of the prior art, the present invention provides an embedded track structure and a track changing method compatible with fasteners for fixing rails, the purpose of which is to solve the problems of difficult maintenance and inconvenience in track changing of embedded tracks.

[0012] To achieve the above-mentioned purpose, the present invention discloses an embedded track structure compatible with fasteners for fixing rails, comprising a rail-bearing groove cast in situ on the ballast bed, and a rail arranged in the rail-bearing groove.

[0013] Wherein, when any of the rails is fixed in the corresponding rail bearing groove in a discrete locking state, it is fixed by a plurality of fastener spring bars arranged on both sides of the rail;

[0014] Each of the fastener spring bars is fixed to the bottom of the corresponding rail groove by an anchor bolt;

[0015] The rail bottom of each rail is provided with a gauge block at the position of the angle formed by the upper surface and the side surface corresponding to the corresponding fastener spring bar.

[0016] Preferably, a pad is provided at the bottom of each of the rail bearing grooves.

[0017] More preferably, when any of the steel rails is fixed in the corresponding rail-supporting groove in a continuously locked state, the corresponding steel rail is locked by filling a polymer casting material in the corresponding rail-supporting groove.

[0018] More preferably, each of the pads and the corresponding bottom of the rail groove for setting a mounting hole for each of the anchor bolts are provided with a dust cover.

[0019] More preferably, a pad is provided between each of the rails fixed in the corresponding rail bearing groove in a discrete locking state and the pad;

[0020] Both sides of each cushion block are movably connected to the corresponding track gauge block.

[0021] Preferably, an anchor bolt sleeve is provided in the ballast below each of the rail bearing grooves corresponding to each of the anchor bolts.

[0022] More preferably, two casing fixing steel bars parallel to the corresponding steel rails and two casing fixing steel bars perpendicular to the corresponding steel rails are provided around the bottom of each anchor bolt casing.

[0023] The present invention also provides a rail replacement method for an embedded track structure compatible with a fastener fixing rail, comprising the following steps:

[0024] Step A1: for each rail fixed in a corresponding rail bearing groove in a continuously locked state, the corresponding polymer casting material is cut, and the rail bearing groove is cleaned;

[0025] Step A2, sawing off the steel rails that need to be replaced and replacing them with new ones;

[0026] Step A3, welding the new rail to the existing rail, and completing fine adjustment;

[0027] Step A4, installing the fastener spring bar, locking the temporary rail with the fastener spring bar, and opening the vehicle to operation;

[0028] When the line where the new rail is located is idle, the new rail is constructed to be fixed in the corresponding rail bearing groove in a continuous locking state, as follows:

[0029] Step B1, for each temporary rail fixed in the corresponding rail bearing groove in a discrete locking state, all corresponding fastener spring bars are unlocked and recovered;

[0030] Step B2, spraying adhesive on the inner wall of the rail bearing groove of the new rail and on both sides of the new rail;

[0031] Step B3: pouring and filling polymer casting material to lock the new rail.

[0032] Beneficial effects of the present invention:

[0033] The present invention can realize the function of completing the track replacement operation in stages at different skylight times, thereby greatly improving the flexibility and convenience of embedded track maintenance.

[0034] The present invention divides the track replacement maintenance operation into two stages for implementation. Each stage only requires completing part of the track replacement process, which reduces the difficulty of maintenance work during a single skylight period, while meeting the requirement of not affecting normal operations and improving the flexibility of track engineering.

[0035] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the structure in which a rail is fixed in a corresponding rail bearing groove in a continuously locked state in one embodiment of the present invention is shown.

[0037] Figure 2 An enlarged structural schematic diagram showing a steel rail fixed in a corresponding rail bearing groove in a continuously locked state in one embodiment of the present invention.

[0038] Figure 3A schematic structural diagram showing a steel rail fixed in a corresponding rail bearing groove in a discrete locking state in one embodiment of the present invention.

[0039] Figure 4 A schematic structural diagram of a sleeve for fixing steel bars is shown outside an anchor bolt sleeve in one embodiment of the present invention. DETAILED DESCRIPTION

[0040] Example

[0041] like Figure 3 As shown, an embedded track structure compatible with fasteners for fixing rails includes a rail-bearing groove 3 cast in situ on the ballast bed, and a rail 1 arranged in the rail-bearing groove 3.

[0042] When any rail 1 is fixed in the corresponding rail bearing groove 3 in a discrete locking state, it is fixed by a plurality of fastener spring bars 8 arranged on both sides of the rail 1;

[0043] Each fastener spring bar 8 is fixed to the bottom of the corresponding rail groove 3 by an anchor bolt 9;

[0044] The bottom of each rail 1 is provided with a gauge block 11 at the angle formed by the upper and side surfaces, corresponding to the corresponding fastener spring bar 8 .

[0045] The present invention provides a fastener spring bar 8 and an anchor bolt 9 at the bottom of the rail bearing groove 3, thereby achieving the condition of being compatible with the fastener spring bar 8 fixing the rail 1. During the rail replacement operation, the processes of cutting the filling material in the rail bearing groove, replacing the rail, welding the rail and fine-tuning can be completed within a skylight period, and then the rail is locked by the fastener spring bar 8.

[0046] The present invention still meets the track requirements for normal train operation when the fastener spring bar 8 is locked. The remaining pouring and filling material process can be completed at any window time according to actual conditions. In short, the technical solution of the present invention can realize the function of completing the track replacement operation in stages at different window times, thereby greatly improving the flexibility and convenience of embedded track maintenance.

[0047] In some embodiments, a pad 5 is disposed at the bottom of each rail support groove 3 .

[0048] In practical applications, the backing plate 5 is usually made of iron or steel, and the backing plate 5 is usually welded to the bottom of the corresponding rail groove 3 .

[0049] In some embodiments, when any steel rail 1 is fixed in the corresponding rail-bearing groove 3 in a continuously locked state, the corresponding steel rail 1 is locked by filling the corresponding rail-bearing groove 3 with a polymer casting material.

[0050] In certain embodiments, each iron backing plate 5 and the corresponding mounting hole at the bottom of the rail bearing groove 3 for setting each anchor bolt 9 are provided with a dust cover 4 .

[0051] In some embodiments, a spacer block 51 is provided between each steel rail 1 fixed in a discrete locking state in a corresponding rail bearing groove 3 and the iron backing plate 5;

[0052] Both sides of each cushion block 51 are movably connected to the corresponding gauge block 11 .

[0053] In certain embodiments, an anchor bolt sleeve 6 is provided in the ballast below each rail bearing groove 3 corresponding to each anchor bolt 9 .

[0054] like Figure 4 As shown, in actual application, the anchor bolt sleeve 6 is usually welded to the bottom of the corresponding rail groove 3, and the longitudinal spacing of each group of fastener anchor bolt sleeves of the iron pad 5 is controlled at 625 mm.

[0055] In some embodiments, two sleeve fixing steel bars 7 parallel to the corresponding rail 1 and two sleeve fixing steel bars 7 perpendicular to the corresponding rail 1 are arranged around the bottom of each anchor bolt sleeve 6 .

[0056] In practical applications, sleeve fixing steel bars 7 with a diameter of φ8 mm are respectively arranged in parallel along the longitudinal and transverse directions of the rail 1 around the bottom of the anchor bolt sleeve 6 to fix the anchor bolt sleeve 6 .

[0057] The lengths of the two casing fixing steel bars 7 parallel to the corresponding rails 1 are slightly longer than the casing diameter, and the lengths of the two casing fixing steel bars 7 perpendicular to the corresponding rails 1 are consistent with the width of the bottom of the rail bearing groove.

[0058] like Figures 1 to 3 As shown, the rail replacement method of the embedded track structure compatible with the fastener fixing rail comprises the following steps:

[0059] Step A1: for each rail 1 fixed in the corresponding rail bearing groove 3 in a continuously locked state, the corresponding polymer casting material is cut, and the rail bearing groove 3 is cleaned;

[0060] Step A2, sawing off the steel rail 1 that needs to be replaced and replacing it with a new steel rail 1;

[0061] Step A3, welding the new rail 1 to the existing rail 1, and completing fine adjustment;

[0062] Step A4, installing the fastener spring bar 8, locking the temporary rail 1 by the fastener spring bar 8, and opening the vehicle to operation;

[0063] When the line where the new rail 1 is located is idle, the new rail 1 is constructed to be fixed in the corresponding rail bearing groove 3 in a continuous locking state, as follows:

[0064] Step B1, for each temporary rail 1 fixed in the corresponding rail bearing groove 3 in a discrete locking state, all corresponding fastener spring bars 8 are unlocked and recovered;

[0065] Step B2, spraying adhesive on the inner wall of the rail groove 3 of the new rail 1 and both sides of the new rail 1;

[0066] Step B3: pouring and filling polymer casting material to lock the new rail 1.

[0067] In actual application, the above two-stage construction work can be completed within two skylight times.

[0068] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. An embedded rail structure compatible with fasteners for fixing rails, comprising a rail bearing groove (3) cast in situ on a ballast bed, and a rail (1) arranged in the rail bearing groove (3); characterized in that: When any of the steel rails (1) is fixed in the corresponding rail-bearing groove (3) in a discrete locking state, it is fixed by a plurality of fastener spring bars (8) arranged on both sides of the steel rail (1); Each of the fastener spring bars (8) is fixed to the bottom of the corresponding rail bearing groove (3) by means of an anchor bolt (9); The bottom of each steel rail (1) is provided with a track gauge block (11) at the position of the angle formed by the upper surface and the side surface, corresponding to the corresponding fastener spring bar (8).

2. The embedded track structure compatible with fasteners for fixing rails according to claim 1, characterized in that: An iron pad (5) is provided at the bottom of each rail bearing groove (3).

3. The embedded track structure compatible with fasteners for fixing rails according to claim 2, characterized in that: When any of the steel rails (1) is fixed in the corresponding rail-supporting groove (3) in a continuously locked state, the corresponding steel rail (1) is locked by filling a polymer casting material in the corresponding rail-supporting groove (3).

4. The embedded track structure compatible with fasteners for fixing rails according to claim 3, characterized in that: Each of the iron pads (5) and the corresponding mounting holes at the bottom of the rail bearing groove (3) for arranging each of the anchor bolts (9) are provided with dust covers (4).

5. The embedded track structure compatible with fasteners for fixing rails according to claim 2, characterized in that: A cushion block (51) is provided between each of the steel rails (1) fixed in the corresponding rail bearing groove (3) in a discrete locking state and the iron pad (5); Both sides of each cushion block (51) are movably connected to the corresponding track gauge block (11).

6. The embedded track structure compatible with fasteners for fixing rails according to claim 1, characterized in that: In the ballast below each rail bearing groove (3), an anchor bolt sleeve (6) is provided corresponding to each anchor bolt (9).

7. The embedded track structure compatible with fasteners for fixing rails according to claim 6, characterized in that: Two sleeve fixing steel bars (7) parallel to the corresponding steel rail (1) and two sleeve fixing steel bars (7) perpendicular to the corresponding steel rail (1) are arranged around the bottom of each anchor bolt sleeve (6).

8. A rail replacement method for an embedded rail structure compatible with fastener-fixed rails, characterized in that: The steps include: Step A1: for each steel rail (1) fixed in a corresponding rail bearing groove (3) in a continuously locked state, the corresponding polymer casting material is cut, and the rail bearing groove (3) is cleaned; Step A2, sawing off the steel rail (1) that needs to be replaced and replacing it with a new steel rail (1); Step A3, welding the new steel rail (1) to the existing steel rail (1), and completing fine adjustment; Step A4, installing the fastener spring bar (8), locking the temporary rail (1) by the fastener spring bar (8), and opening the vehicle to traffic; When the line where the new steel rail (1) is located is idle, the new steel rail (1) is constructed to be fixed in the corresponding rail bearing groove (3) in a continuous locking state, specifically as follows: Step B1, for each temporary rail (1) fixed in a discrete locking state in a corresponding rail bearing groove (3), all corresponding fastener spring bars (8) are unlocked and recovered; Step B2, spraying adhesive on the inner wall of the rail bearing groove (3) of the new steel rail (1) and on both sides of the new steel rail (1); Step B3, pouring and filling polymer casting material to lock the new rail (1).

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