A cantilever retaining wall for embankments and embankments

Abstract

This application discloses a cantilever retaining wall for an embankment and an embankment. The cantilever retaining wall is symmetrically arranged on both sides of the embankment along the road extension direction. The cantilever retaining wall includes a base plate (1) and a wall body (2). The base plates (1) of the cantilever retaining walls on both sides of the embankment are connected by tie beams (3). The top of the wall body (2) is connected to the top of the roadbed (4) by reinforcing steel bars. The embankment retaining wall proposed in this application increases the integrity of the cantilever retaining walls on both sides of the embankment by setting tie beams on the base plates of the cantilever retaining walls on both sides of the embankment, thereby improving the structural stability against overturning and sliding.

Description

Technical Field

[0001] This application relates to the field of roadbed retaining walls, and more specifically, to an embankment cantilever retaining wall and an embankment in which the embankment cantilever retaining wall is installed. Background Technology

[0002] Cantilever retaining walls are a common structure in railways and rail transit systems. They rely on their own rigidity and foundation reaction to resist earth pressure, supporting the soil and preventing slippage or collapse.

[0003] In traditional railway and rail transit engineering, the height of cantilever retaining walls generally does not exceed 6 meters. When the wall height exceeds 6 meters, the length of the base slab usually needs to be increased to meet the design requirements for anti-sliding and anti-overturning. Especially when a sound barrier is installed on top of the wall or the friction coefficient of the foundation soil is low, the large horizontal load not only further increases the length of the base slab, but also significantly affects the overall overturning stability of the retaining wall, as well as the reinforcement design of the wall body and base slab, thus leading to a significant increase in project scale and construction costs.

[0004] Therefore, how to provide a way to expand the applicability of cantilever retaining walls without increasing the width of the roadbed has become a technical problem that needs to be solved in this field. Utility Model Content

[0005] In view of this, according to the first aspect of this application, a cantilever retaining wall for embankments is proposed, wherein the cantilever retaining wall is arranged symmetrically on both sides of the embankment along the direction of road extension; wherein the cantilever retaining wall includes a base plate and a wall body, and the base plates of the cantilever retaining walls on both sides of the embankment are connected by tie beams; the top of the wall body is connected to the top of the roadbed by reinforcing steel bars.

[0006] Preferably, the height of the wall is set to 4m-12m.

[0007] Preferably, the wall and the base plate are arranged in an inverted "T" shape, and the base plate and the wall are detachably connected or are an integral structure.

[0008] Preferably, the top of the wall is provided with retaining wall reinforcement.

[0009] Preferably, the retaining wall reinforcement is one of ordinary steel bars or epoxy resin coated steel bars.

[0010] Preferably, the cantilever retaining wall is made of concrete.

[0011] According to a second aspect of this application, an embankment is proposed, which includes a roadbed and an embankment cantilever retaining wall, the embankment cantilever retaining wall being the aforementioned embankment cantilever retaining wall.

[0012] Preferably, the roadbed is filled between the cantilever retaining walls on both sides of the embankment.

[0013] Preferably, the embankment further includes: a roadbed top slab, which is disposed on top of the roadbed; the roadbed top slab is provided with reinforcing bars, which are arranged along the radial direction of the embankment and are connected to the wall body of the cantilever retaining wall.

[0014] Preferably, the embankment further includes a sound barrier, which is installed on the top of the cantilever retaining wall.

[0015] The embankment retaining wall proposed in this application increases the integrity of the cantilever retaining walls on both sides of the embankment by setting tie beams on the bottom plate of the cantilever retaining walls on both sides of the embankment, thereby improving the structural stability against overturning and sliding.

[0016] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application, and the illustrative embodiments and descriptions thereof are used to explain this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of a cantilever retaining wall for embankments based on existing technology.

[0019] Figure 2 This is a schematic diagram of a cantilever retaining wall for an embankment according to a preferred embodiment of this application. Detailed Implementation

[0020] The technical solution of this application will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] Currently, in railways or rail transit, embankment cantilever retaining walls are independently installed on both sides of the road (e.g., Figure 1 As shown, there is no connection between the wall body 2 or the base plate 1 of the cantilever retaining walls on both sides of the embankment. If the height of the wall body 2 needs to be increased, the earth pressure in the embankment will cause the retaining wall to tilt outward. To improve overturning and sliding stability, it is usually necessary to increase the length of the base plate 1 to increase the lever arm of the overturning moment and the contact area with the foundation, thereby improving the overturning and sliding resistance. In summary, if the height of the cantilever retaining wall needs to be increased, the length of the base plate 1 needs to be increased to ensure stability, which increases the overall width of the embankment and also increases the project cost.

[0022] Therefore, as Figure 2As shown, according to the first aspect of this application, a cantilever retaining wall for embankments is proposed, wherein the cantilever retaining walls are arranged symmetrically on both sides of the embankment along the road extension direction; wherein the cantilever retaining wall includes a base plate 1 and a wall body 2, and the base plates 1 of the cantilever retaining walls on both sides of the embankment are connected by tie beams 3; the top of the wall body 2 is connected to the reinforcing steel bars at the top of the roadbed 4.

[0023] According to a second aspect of this application, an embankment is proposed, which includes a roadbed 4 and an embankment cantilever retaining wall, the embankment cantilever retaining wall being the aforementioned embankment cantilever retaining wall.

[0024] The aforementioned roadbed 4 fills the space formed by the cantilever retaining walls on both sides of the embankment. The bottom slabs 1 of the cantilever retaining walls on both sides are connected by tie beams 3, and the top of the wall body 2 is connected to the top reinforcement of the roadbed 4. This connects the bottom and top of the cantilever retaining walls together, making the structural integrity of the cantilever retaining walls on both sides stronger and forming an integrated load-bearing system. This system can work together to resist overturning and sliding caused by earth pressure, reduce uneven deformation, and the tie beams 3 can also serve as intermediate supports for the bottom slab 1 to reduce the calculated span, reduce bending and shear internal forces, prevent cracking of the bottom slab 1, and improve the overturning and sliding resistance by increasing the overall gravitational moment and base friction. The tie beams 3 are made of reinforced concrete.

[0025] The cantilever retaining walls are connected by tie beams 3 and top steel bars, which can reduce the length of the bottom plate 1 of the roadbed 4 without increasing the original width of the roadbed 4, while ensuring the overall height and stability of the cantilever retaining walls. This saves construction costs.

[0026] The height of the aforementioned wall 2 can be selected according to actual needs. In this application, the height of the wall 2 can be set to 4m-12m.

[0027] Preferably, the wall body 2 and the base plate 1 are arranged in an inverted "T" shape, and the base plate 1 and the wall body 2 are detachably connected or are an integral structure. In this application, the wall body 2 and the base plate 1 are an integral structure. The bottom of the base plate 1 is provided with a downward protrusion to increase the friction between the base plate 1 and the foundation, ensuring the anti-slip stability of the cantilever retaining wall.

[0028] To ensure the structural stability of the cantilever retaining wall of the embankment, preferably, the top of the wall body 2 may be provided with retaining wall reinforcement 5. The retaining wall reinforcement 5 is one of ordinary steel bars or epoxy resin coated steel bars, preferably epoxy coated steel bars. Using epoxy coated steel bars can improve the corrosion resistance of the steel bars and improve the durability and stability of the cantilever retaining wall.

[0029] Preferably, the cantilever retaining wall is made of concrete.

[0030] Preferably, the roadbed 4 is filled between the cantilever retaining walls on both sides of the embankment. The roadbed 4 is at least one of soil, stone, or industrial waste. The soil filler includes clay, sand, loam, and loamy sand; the stone filler includes crushed stone, pebbles, gravel mixture, weathered granite, sandstone, and shale; the industrial waste includes slag (blast furnace slag, steel slag), fly ash, and construction waste. The appropriate filler can be selected based on actual needs. The roadbed 4 serves as the load-bearing carrier for the road above, directly bearing the vertical load, horizontal force, and impact force transmitted from the pavement structure layer, distributing the load evenly through its own structure. Furthermore, by filling between the retaining walls, the roadbed 4 can resist the lateral pressure of the retaining walls, reducing the thrust of the soil behind the retaining walls through its own weight and friction, thus lowering the risk of overturning and sliding of the retaining walls. It can also form an integrated load-bearing system with the retaining walls.

[0031] A certain height of backfill is also required on the outside of the cantilever retaining wall, and the height of the backfill is set according to the actual situation.

[0032] According to a preferred embodiment of this application, the embankment may further include: a roadbed top slab 6, which is disposed on top of the roadbed 4; the roadbed top slab 6 is provided with reinforcing bars 61, which are arranged along the radial direction of the embankment, and the reinforcing bars are connected to the wall body 2 of the cantilever retaining wall. The roadbed top slab 6 is a concrete slab, and a cushion layer 8, which is a concrete cushion layer, is also provided below the roadbed top slab 6; the reinforcing bars 61 in the roadbed top slab 6 are connected to the retaining wall reinforcing bars 5 at the top of the cantilever retaining wall body 2, and the connection can be a fixed connection, such as welding. The roadbed top slab 6 is a reinforced concrete slab.

[0033] To avoid noise pollution from road traffic, the embankment may preferably include a sound barrier 7, which is installed on top of the cantilever retaining wall 2. The material of the sound barrier 7 can be selected according to actual needs, and the connection between the sound barrier 7 and the wall 2 can be detachable or fixed, depending on the specific connection method.

[0034] The construction method for the embankment in this application is as follows:

[0035] (1) Foundation treatment: Remove soil layers that cannot be used as bearing layers, such as planting soil and miscellaneous fill soil. If the bearing capacity of the foundation still cannot meet the requirements, the foundation shall be reinforced to meet the bearing capacity requirements of the retaining wall.

[0036] (2) Constructing the cantilever retaining wall and reinforced concrete tie beam 3, pre-embedding epoxy resin coated steel bars during the construction of the cantilever retaining wall;

[0037] (3) Layered filling of the roadbed 4;

[0038] (4) Construction of subbase 8 and roadbed surface reinforced concrete slab 6. When constructing roadbed surface reinforced concrete slab 6, leave 30cm unconstructed on the side of the retaining wall.

[0039] (5) Civil engineering works on the construction line, such as: track bed, evacuation platform, etc.;

[0040] (6) Connect the pre-embedded epoxy resin coated steel bars of the retaining wall and the transverse steel bars in the reinforced concrete slab of the embankment top, and pour the reinforced concrete slab 6 of the roadbed surface layer 30cm on the side of the retaining wall.

[0041] (7) Laying tracks.

[0042] The preferred embodiments of this application have been described in detail above. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0043] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

[0044] Furthermore, various different embodiments of this application can be combined in any way, as long as they do not violate the spirit of this application, they should also be regarded as the content disclosed by this invention.

Claims

1. A cantilever retaining wall for embankments, characterized in that, The cantilever retaining wall is set on both sides of the embankment, symmetrically arranged along the direction of road extension; The cantilever retaining wall includes a base plate (1) and a wall body (2). The base plates (1) of the cantilever retaining walls on both sides of the embankment are connected by tie beams (3). The top of the wall body (2) is connected to the top of the roadbed (4) by steel reinforcement.

2. The embankment cantilever retaining wall according to claim 1, characterized in that, The height of the wall (2) is set to 4m-12m.

3. The embankment cantilever retaining wall according to claim 1, characterized in that, The wall (2) and the base plate (1) are arranged in an inverted "T" shape, and the base plate (1) and the wall (2) are detachably connected or are an integral structure.

4. The embankment cantilever retaining wall according to claim 1, characterized in that, The top of the wall (2) is provided with retaining wall reinforcement (5).

5. The embankment cantilever retaining wall according to claim 4, characterized in that, The retaining wall reinforcement (5) is either ordinary steel reinforcement or epoxy resin coated steel reinforcement.

6. The embankment cantilever retaining wall according to claim 1, characterized in that, The material of the cantilever retaining wall is concrete.

7. An embankment, characterized in that, The embankment includes a roadbed (4) and an embankment cantilever retaining wall, which is the embankment cantilever retaining wall as described in any one of claims 1-6.

8. The embankment according to claim 7, characterized in that, The roadbed (4) is filled between the cantilever retaining walls on both sides of the embankment.

9. The embankment according to claim 8, characterized in that, The embankment also includes: a roadbed top plate (6), which is set on top of the roadbed (4); the roadbed top plate (6) is provided with reinforcing bars (61), which are set along the radial direction of the embankment and are connected to the wall body (2) of the cantilever retaining wall.

10. The embankment according to claim 9, characterized in that, The embankment also includes a sound barrier (7), which is installed on the top of the cantilever retaining wall (2).

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