U-shaped groove structure of railway transition section

Abstract

The utility model discloses a U-shaped groove structure of a railway transition section, which comprises a U-shaped groove mechanism, the U-shaped groove mechanism is arranged at the upper end of a pile foundation, and a backfill soil layer is arranged on the inner side of the U-shaped groove mechanism; the U-shaped groove mechanism comprises a bottom plate and side walls; the bottom plate is connected to the upper end of the pile foundation, and the two ends of the bottom plate are connected with the side walls. The backfill soil layer comprises a foundation bed body, a foundation bed bottom layer and a foundation bed surface layer; the foundation bed body, the foundation bed bottom layer and the foundation bed surface layer are sequentially arranged on the bottom plate from bottom to top. And the upper end of the pile foundation is connected with a steel casing. The lower end face of the bottom plate is connected with a cushion layer. The U-shaped groove structure of the railway transition section aims to overcome existing defects, and smoothness and operation safety of a track are guaranteed.

Description

Technical Field

[0001] This utility model relates to a U-shaped groove structure for railway transition sections. Background Technology

[0002] Railways, including the roadbed and tracks, are the foundation for train operation. Tracks typically consist of rails, sleepers, and ballast. Advantages of railways include: large capacity: they can transport large numbers of passengers and goods simultaneously; a single train can carry thousands of tons of cargo or hundreds of passengers. Low energy consumption: compared to transportation methods like automobiles and airplanes, railway transportation consumes less energy per unit. Less pollution: electrically powered railway transportation causes less environmental pollution; even diesel locomotives emit relatively few pollutants. High safety: railway transportation has a comprehensive signaling system and safety management regulations, ensuring relatively safe and stable operation.

[0003] To ensure the safe, smooth, and comfortable operation of high-speed trains, the transition between the roadbed and bridges, tunnels, and transverse structures of high-speed railways must be safe and reliable. When the transition section between the roadbed and bridge is located on soft ground and the surrounding area is limited, a suitable structural design that can adapt to the foundation and the surrounding environment is urgently needed. Therefore, a U-shaped channel structure for railway transition sections is proposed to address these issues. Utility Model Content

[0004] The purpose of this utility model is to overcome the existing defects and provide a U-shaped groove structure for railway transition sections, which ensures the smoothness of the track and operational safety.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a U-shaped groove structure for a railway transition section, comprising a U-shaped groove mechanism, wherein the U-shaped groove mechanism is disposed at the upper end of the pile foundation, and a backfill soil layer is disposed inside the U-shaped groove mechanism;

[0006] The U-shaped groove mechanism includes a base plate and side walls; the base plate is connected to the upper end of the pile foundation, and the two ends of the base plate are connected to the side walls.

[0007] Preferably, the backfill soil layer includes a subgrade body, a subgrade bottom layer, and a subgrade surface layer; the subgrade body, the subgrade bottom layer, and the subgrade surface layer are arranged sequentially from bottom to top on the base plate.

[0008] Preferably, the upper end of the pile foundation is connected to a steel casing.

[0009] Preferably, a padding layer is connected to the lower end face of the base plate.

[0010] Preferably, a chamfer is provided between the side wall and the base plate.

[0011] Preferably, the base plate is connected to foot guards on both sides.

[0012] Preferably, slope protection is provided at both ends of the backfill soil layer.

[0013] Preferably, a drainage hole is provided at the bottom of the side wall.

[0014] Preferably, a filter layer is provided on the side of the sidewall closest to the backfill soil layer.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the U-shaped groove structure of this railway transition section, by setting a U-shaped groove mechanism at the upper end of the pile foundation and setting a backfill soil layer in the U-shaped groove mechanism, can meet the requirements of post-construction settlement and uneven settlement, ensuring the smoothness of the track and operational safety; the U-shaped groove mechanism is structurally stable, easy to construct, and low in cost. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the U-shaped groove structure of the railway transition section of this utility model.

[0018] In the diagram: 1. Pile foundation; 2. Steel casing; 3. Subbase; 4. U-shaped channel mechanism; 4-1. Bottom plate; 4-2. Side wall; 4-3. Chamfer; 5. Toe protection; 6. Drainage hole; 7. Filter layer; 8. Slope protection; 9. Subgrade body; 10. Subgrade bottom layer; 11. Subgrade surface layer. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1 A U-shaped channel structure for a railway transition section includes a U-shaped channel mechanism 4, which is installed on the upper end of a pile foundation 1. A backfill soil layer is installed inside the U-shaped channel mechanism 4. A steel casing 2 is connected to the upper end of the pile foundation 1. A cushion layer 3 is connected to the lower end of the bottom plate 4-1. The cushion layer 3 is 0.1m thick and is made of C30 plain concrete.

[0021] Specifically, pile foundation 1 is a 1m diameter bored cast-in-place pile with C40 concrete strength, 60m length, and the top of the pile is embedded in the base plate 4-1 by no less than 10cm. There are 3 piles arranged with a transverse spacing of 6.5m and 5 piles arranged with a longitudinal spacing of 5m.

[0022] Specifically, the steel casing 2 has a wall thickness of 8mm and an inner diameter of 1.2m, and is followed by pile 1 at a depth of 10m, and will not be removed.

[0023] Specifically, the U-shaped channel mechanism 4 includes a base plate 4-1 and side walls 4-2; the base plate 4-1 is connected to the upper end of the pile foundation 1, and both ends of the base plate 4-1 are connected to the side walls 4-2. A chamfer 4-3 is provided between the side walls 4-2 and the base plate 4-1.

[0024] Specifically, the U-shaped channel mechanism 4 is made of C50 reinforced concrete, with one section every 20m in the longitudinal direction. Expansion joints with a width of about 0.02m are set between sections, and the expansion joints are filled with asphalt wood fiberboard.

[0025] Specifically, the base plate 4-1 is 0.8m thick and 17m wide, the side wall 4-2 is 0.6m wide and 2.7m high, and the chamfer 4-3 is 1m wide and 0.5m high.

[0026] Specifically, the backfill soil layer includes the subgrade body 9, the subgrade bottom layer 10, and the subgrade surface layer 11; the subgrade body 9, the subgrade bottom layer 10, and the subgrade surface layer 11 are arranged sequentially from bottom to top on the base slab 4-1. Slope protection 8 is provided at both ends of the backfill soil layer.

[0027] Specifically, the subgrade body 9, the subgrade bottom layer 10, and the subgrade surface layer 11 all have a 2% slope from the centerline to both sides. The subgrade body 9 consists of 2m thick coarse-grained soil filler of groups A, B, and C (excluding fine sand and silt). The subgrade bottom layer 10 consists of 1.4m thick gravel and sandy soil filler of groups A and B. The subgrade surface layer 11 consists of 0.3m thick graded crushed stone. The slope protection 8 is dry-laid rubble masonry, 0.5m thick, with a slope of 1:1.75, and is set on the subgrade bottom layer.

[0028] Specifically, the base plate 4-1 is connected to the two sides of the foot protection 5. The foot protection 5 is made of M10 mortar-grouted rubble masonry, with a top width of 1m, a height of 1m, and a slope of 1:0.75.

[0029] Specifically, drainage holes 6 are provided at the bottom of side wall 4-2. The drainage holes 6 are PVC pipes with a diameter of 0.1m, which are staggered at the bottom of the side wall every 2m, with a drainage slope of not less than 4%.

[0030] Specifically, a filter layer 7 is installed on the side wall 4-2 near the backfill soil layer. The filter layer 7 is a PFF integral composite filter layer with a multi-layer structure: an upper filter layer, a middle drainage layer, and a lower template layer, which is located on the back of the water inlet side wall of the drainage hole 6.

[0031] The U-shaped trough structure of this railway transition section, by setting a U-shaped trough mechanism 4 at the upper end of the pile foundation 1 and setting a backfill soil layer inside the U-shaped trough mechanism 4, can meet the requirements of post-construction settlement and uneven settlement, ensuring the smoothness of the track and operational safety; the U-shaped trough mechanism is stable, easy to construct and low in cost.

[0032] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A U-shaped groove structure for a railway transition section, characterized in that, Includes a U-shaped groove mechanism (4), which is set at the upper end of the pile foundation (1), and a backfill soil layer is set inside the U-shaped groove mechanism (4); The U-shaped groove mechanism (4) includes a base plate (4-1) and a side wall (4-2); the base plate (4-1) is connected to the upper end of the pile foundation (1), and the two ends of the base plate (4-1) are connected to the side wall (4-2).

2. The U-shaped groove structure for the railway transition section according to claim 1, characterized in that, The backfill soil layer includes a subgrade body (9), a subgrade bottom layer (10), and a subgrade surface layer (11); the subgrade body (9), the subgrade bottom layer (10), and the subgrade surface layer (11) are arranged sequentially from bottom to top on the base plate (4-1).

3. The U-shaped groove structure for the railway transition section according to claim 1, characterized in that, The upper end of the pile foundation (1) is connected to a steel casing (2).

4. The U-shaped groove structure for the railway transition section according to claim 1, characterized in that, The bottom surface of the base plate (4-1) is connected to a pad layer (3).

5. The U-shaped groove structure for the railway transition section according to claim 1, characterized in that, A chamfer (4-3) is provided between the side wall (4-2) and the base plate (4-1).

6. The U-shaped groove structure for the railway transition section according to claim 1, characterized in that, The base plate (4-1) is connected to foot guards (5) on both sides.

7. The U-shaped groove structure for the railway transition section according to claim 1, characterized in that, The backfill soil layer is provided with slope protection (8) at both ends.

8. The U-shaped groove structure for the railway transition section according to claim 1, characterized in that, The bottom of the side wall (4-2) is provided with a drainage hole (6).

9. The U-shaped groove structure for the railway transition section according to claim 1, characterized in that, A filter layer (7) is provided on the side of the sidewall (4-2) near the backfill soil layer.

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