Prefabricated monolithic track bed for level crossing

Abstract

The utility model relates to a prefabricated monolithic track bed for a level crossing. At present, a ballast bed of a level crossing is long in construction period, a concrete pavement panel is easy to crack, steel bars are exposed and even broken and easy to displace or move under frequent rolling of vehicles, and damaged parts of the ballast bed of the level crossing are inconvenient to replace and difficult to maintain. Two steel rails and a plurality of fasteners are arranged on the track bed, the steel rails and the fasteners are arranged in fastener grooves, and the track bed is formed by splicing more than one precast concrete track bed slab; rubber insertion strips are arranged on the two sides of the steel rail, the rubber insertion strips are fixed to the roadbed slab through rubber elastic strips, and detachable rubber cushion plates are arranged between the rubber insertion strips and the fasteners. A plurality of pieces of protection angle steel are arranged at the corner angles of the tops of the fastener grooves and on the two sides of the roadbed slab, and rubber cushion layers are arranged below the protection angle steel. The utility model can quickly construct, is not easy to damage, and is easy to maintain and repair.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, specifically to a prefabricated integral track bed for level crossings. Background Technology

[0002] A level crossing is a point where a railway intersects and connects with a road or pedestrian crossing. A well-designed level crossing can reduce the risk of traffic accidents and ensure the safety of railway and road traffic.

[0003] Currently, common material types for level crossings include cast-in-place concrete slabs, rubber level crossings, asphalt-paved level crossings, and steel-paved level crossings. However, in actual use, the construction period for the slabs of these level crossings is long, and concrete slabs are prone to cracking, exposed rebar, or even breakage under frequent vehicle traffic. Furthermore, due to their light weight and weak fixation, they are prone to displacement or shifting, which can impact the railway line and threaten traffic safety. In addition, it is currently inconvenient to replace damaged parts of the slabs at level crossings, making maintenance difficult.

[0004] Therefore, there is an urgent need for a track bed for level crossings that can be constructed quickly, is not easily damaged, and is easy to maintain and repair. Summary of the Invention

[0005] The purpose of this invention is to provide a prefabricated integral track bed for level crossings, so as to at least solve the problems of long construction period, easy damage and difficult maintenance of track beds at level crossings.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A precast integral track bed for level crossings, the track bed is provided with two steel rails and multiple fasteners, the steel rails and the fasteners are all set in the fastener grooves, and the track bed is spliced ​​from one or more precast concrete track bed slabs;

[0008] Rubber inserts are provided on both sides of the rail, and the rubber inserts are fixed to the track bed by rubber elastic strips. A detachable rubber pad is provided between the rubber inserts and the fasteners.

[0009] Multiple protective angle steels are provided at the top corner of the fastener groove and on both sides of the track bed plate, and a rubber pad layer is provided below the protective angle steels.

[0010] Furthermore, the protective angle steel is fixed to the track bed plate by a number of limiting bolts, and is distributed in multiple rows.

[0011] Furthermore, the track bed slab is provided with a plurality of wedge-shaped grooves, which are located between adjacent protective angle steels, and caulking rubber strips are provided in the wedge-shaped grooves.

[0012] Furthermore, a metal anti-slip plate is provided above the protective angle steel.

[0013] Furthermore, the rubber pad is a C-shaped hollow prefabricated structure, and the rubber pad is fixed by interacting with the track bed plate, the rail and the fastener respectively.

[0014] Furthermore, each of the track bed slabs has multiple lifting holes symmetrically opened on both sides of its longitudinal direction, and each of the track bed slabs has a grouting hole, multiple injection holes and multiple identification plates reserved in the middle.

[0015] Furthermore, the bottom of the track bed slab is provided with limiting protrusions and several limiting reinforcing bars.

[0016] Furthermore, the lower roadbed fill material is provided with a limiting groove that matches the limiting protrusion.

[0017] Furthermore, geotextile is provided between the bottom of the track bed slab and the lower subgrade fill material.

[0018] Furthermore, the top of the steel rail is flush with the top of the rubber inserts on both sides.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. This utility model provides a prefabricated integral track bed for level crossings. The track bed slabs can be prefabricated in advance according to the actual working conditions, thereby saving the construction period, reducing the impact on roads with high commuting volume, and the lifting holes on the track bed slabs not only ensure the safety during transportation, but also provide convenience for on-site installation and positioning, significantly improving construction efficiency.

[0021] 2. This utility model features protective angle steel at the top corners of the fastener grooves and on both sides of the track bed slab along the track direction. This reduces damage to the corners of the track bed slab when vehicles pass. A rubber pad is provided under the protective angle steel to buffer the track bed slab and prevent rigid contact between them. Metal anti-slip plates are provided on the protective angle steel to reduce the probability of accidents in rainy or snowy weather. Furthermore, the lower part of the track bed slab is provided with limiting protrusions and limiting steel bars to reduce deformation of the rails and road surface caused by lateral and longitudinal movement of the track bed slab. Expansion joints filled with polyethylene foam are provided between the track bed slabs to prevent damage to the track bed slabs caused by mutual compression due to longitudinal movement.

[0022] 3. A detachable rubber pad is provided between the rubber insert and the fastener of this utility model, which facilitates the replacement of damaged fasteners and makes maintenance easy.

[0023] 4. The pre-reserved injection hole of this utility model optimizes the elevation adjustment process. By injecting quick-drying concrete and other materials through the pre-reserved injection hole, the elevation deviation can be quickly corrected, ensuring the laying accuracy.

[0024] 5. The grouting holes reserved in this utility model provide convenience for the subsequent subgrade settlement treatment. Grouting can be carried out by using the pre-embedded grouting holes to accurately reinforce the diseased sections and restore the stability of the pavement structure. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0026] Figure 1 This is an elevation view of the present invention;

[0027] Figure 2 This is a plan view of the present invention;

[0028] Figure 3 This is a diagram of an expansion joint;

[0029] Figure 4 This is a schematic diagram showing the location of the rubber pad;

[0030] The diagram is labeled as follows:

[0031] 1-Slide bed slab, 2-Rail, 3-Fastener, 4-Rubber insert, 5-Rubber elastic strip, 6-Rubber pad, 7-Protective angle steel, 8-Rubber pad layer, 9-Limit bolt, 10-Limit slot, 11-Limit reinforcing bar, 12-Limit groove, 13-Geotextile, 14-Lifting hole, 15-Injection hole, 16-Grouting hole, 17-Metal anti-slip plate, 18-Expansion joint, 19-Polyethylene foam board, 20-Silicone, 21-Road filler layer, 22-Subgrade filler, 23-Signage. Detailed Implementation

[0032] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0033] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] Example:

[0036] like Figure 1 As shown, this embodiment provides a prefabricated integral track bed for level crossings. The track bed is provided with two steel rails 2 and multiple fasteners 3. The fasteners 3 are located on both sides of the bottom of the steel rails 2 to fix the steel rails 2. Both the steel rails 2 and the fasteners 3 are set in the fastener grooves.

[0037] Specifically, the track bed is made up of one or more precast concrete track bed slabs 1 spliced ​​together. The track bed slabs 1 are precast in advance, which can save the construction period and reduce the impact on roads with large commuting volume. In addition, the top of the track bed slabs 1 is lower than the top of the road filling layer 21.

[0038] In this embodiment, the material of the track bed slab 1 is C50 reinforced concrete, and the dimensions of length × width × height are 3000mm × 2800mm × 500mm.

[0039] Rubber inserts 4 are installed on both sides of the rail 2. Since the wheels of the locomotive and rolling stock run between the two rails 2 during operation, the shape of the rubber inserts 4 on the inner side of the two rails 2 is different from that on the outer side. The gap between the rubber inserts 4 on the inner side of the two rails 2 and the rail 2 is relatively large. The rubber inserts 4 are located above the fasteners 3. The vertical cross section of the rubber inserts 4 is inverted T-shaped. The rubber inserts 4 are fixed with rubber spring strips 5 by strong adhesive. The rubber inserts 4 are fixed to the track bed slab 1 by the rubber spring strips 5. The rubber spring strips 5 and the track bed slab 1 are fixed by strong adhesive. The rubber inserts 4 can play a role in shock absorption. On the other hand, the rail 2 has lateral vibration in the direction perpendicular to the track direction during use. The retractable rubber inserts 4 provide vibration space for the rail 2, reducing the rail damage caused by the inability to laterally vibrate. The top of the rail 2 is flush with the top of the rubber inserts 4 on both sides.

[0040] like Figure 4 As shown, a rubber pad 6 is provided below the rubber insert 4 and above the fastener 3. The rubber pad 6 is a C-shaped hollow prefabricated structure. The rubber pad 6 maintains its stability by interacting with the support point A of the rail 2, the support point B of the fastener 3 and the support point C of the track bed slab 1. The prefabricated rubber pad 6 also facilitates the replacement of damaged fasteners 3.

[0041] Specifically, protective angle steel 7 is provided at the top corner of the fastener groove and on both sides of the track bed 1. The protective angle steel 7 can reduce the damage to the corner of the track bed 1 when vehicles pass. A rubber pad 8 is provided between the protective angle steel 7 and the track bed 1. The rubber pad 8 provides a buffer between the protective angle steel 7 and the track bed 1, avoiding rigid contact between the protective angle steel 7 and the track bed 1.

[0042] The protective angle steel 7 is fixed to the track bed slab 1 by limiting bolts 9 and is arranged in six rows. The track bed slab 1 is provided with multiple wedge-shaped grooves, which are located between adjacent protective angle steel 7 in each row. A caulking rubber strip 10 is embedded in the wedge-shaped groove. The caulking rubber strip 10 is flush with the top of the protective angle steel 7. When the protective angle steel 7 is subjected to vibration or compression, the caulking rubber strip 10 acts as an expansion joint to buffer the protective angle steel 7 and prevent it from being damaged or deformed. The detachable limiting bolts 9 make it easy to replace the damaged protective angle steel 7.

[0043] In this embodiment, a metal anti-slip plate 17 is welded on the top of the protective angle steel 7 to reduce the probability of accidents in rainy or snowy weather.

[0044] like Figure 2 As shown, each track slab 1 has eight lifting holes 14 symmetrically opened on both sides of the longitudinal direction, with four lifting holes 14 on each side, to facilitate the transportation and installation of the track slab 1. Each track slab 1 has a pre-reserved injection hole 15, two grouting holes 16 and two identification plates 23 in the middle. The injection hole 15, grouting hole 16 and identification plate 23 are all distributed on the longitudinal center line. The injection hole 15 is used to inject quick-drying concrete and other materials to quickly level the elevation of the track slab 1. The grouting hole 16 is used for the treatment of defects when the subgrade settles later. The identification plate 23 can be marked with the production time, length, steel mold number and site marking information of the track slab 1.

[0045] Specifically, such as Figure 3 As shown, an expansion joint 18 is provided between adjacent track slabs 1. The expansion joint 18 is filled with polyethylene foam board 19, and the expansion joint 18 is sealed with silicone 20 around its perimeter. The expansion joint 18 can prevent the track slabs 1 from being squeezed against each other due to longitudinal movement, thus avoiding damage to the track slabs 1.

[0046] Several limiting steel bars 11 are cast near the bottom of the track bed slab 1. A limiting protrusion is integrally set at the bottom of the track bed slab 1. A limiting groove 12 that fits the limiting protrusion is set on the lower subgrade fill 22. The limiting protrusion is embedded in the limiting groove 12. The limiting steel bars 11 and the limiting protrusion can strengthen and fix the track bed slab 1, thereby reducing the deformation of the rail 2 and the road surface caused by the transverse and longitudinal movement of the track bed slab 1.

[0047] In this embodiment, a geotextile 13 is provided between the bottom of the track bed slab 1 and the lower roadbed fill 22 for isolation, to maintain the overall structure and function of the track bed slab 1, thereby strengthening the load-bearing capacity of the track bed slab 1.

[0048] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A prefabricated integral track bed for a level crossing, the track bed being provided with two steel rails (2) and multiple fasteners (3), wherein the steel rails (2) and the fasteners (3) are all disposed within fastener grooves, characterized in that: The track bed is assembled from one or more precast concrete track bed slabs (1); Rubber inserts (4) are provided on both sides of the rail (2). The rubber inserts (4) are fixed to the track bed slab (1) by rubber elastic strips (5). A detachable rubber pad (6) is provided between the rubber inserts (4) and the fastener (3). Multiple protective angle steels (7) are provided at the top corner of the fastener groove and on both sides of the track bed plate (1), and a rubber pad layer (8) is provided below the protective angle steels (7).

2. A prefabricated integral track bed for a level crossing according to claim 1, characterized in that: The protective angle steel (7) is fixed to the track bed plate (1) by several limiting bolts (9) and is arranged in multiple rows.

3. A prefabricated integral track bed for a level crossing according to claim 1, characterized in that: The track bed slab (1) is provided with a plurality of wedge-shaped grooves, which are located between adjacent protective angle steels (7), and are provided with caulking rubber strips (10).

4. A prefabricated integral track bed for a level crossing according to claim 1, characterized in that: A metal anti-slip plate (17) is provided above the protective angle steel (7).

5. A prefabricated integral track bed for a level crossing according to claim 1, characterized in that: The rubber pad (6) is a C-shaped hollow prefabricated structure. The rubber pad (6) is fixed by interacting with the track bed slab (1), the rail (2) and the fastener (3) respectively.

6. A prefabricated integral track bed for a level crossing according to claim 1, characterized in that: Each track bed slab (1) has multiple lifting holes (14) symmetrically opened on both sides of the longitudinal direction. Each track bed slab (1) has a grouting hole (15), multiple grouting holes (16) and multiple identification plates (23) reserved in the middle.

7. A prefabricated integral track bed for a level crossing according to claim 1, characterized in that: The bottom of the track bed slab (1) is provided with a limiting protrusion and several limiting steel bars (11).

8. A prefabricated integral track bed for a level crossing according to claim 7, characterized in that: The lower roadbed fill material (22) is provided with a limiting groove (12) that matches the limiting protrusion.

9. A prefabricated integral track bed for a level crossing according to claim 8, characterized in that: A geotextile (13) is provided between the bottom of the track bed slab (1) and the lower roadbed fill material (22).

10. A prefabricated integral track bed for a level crossing according to claim 1, characterized in that: The top of the rail (2) is flush with the top of the rubber inserts (4) on both sides.

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