A self-anchored lightweight soil retaining wall for roadbed slopes in soft soil areas

Abstract

The invention relates to the field of retaining wall design in soft soil areas, and discloses a self-anchored lightweight soil retaining wall for roadbed slopes in soft soil areas, comprising a foundation 1, on which a foundation 2 is placed, and on which a road surface is paved; two retaining wall main bodies are symmetrically arranged and stacked on both sides of the foundation 1 and the foundation 2; a centralizing plate is arranged on the retaining wall main body, and one end of the centralizing plate extends into the foundation 1 and the foundation 2; a plurality of grilles are provided, and corresponding grilles are connected to each other, and the grilles are arranged in the foundation 2 and the retaining wall main body. The present invention reduces the need for additional reinforcement treatment of the foundation, and at the same time, through the joint action of multiple mechanisms, can form a good bite effect, control the displacement of soil particles, improve the overall strength and stability of the roadbed and retaining wall structure, increase the mutual pulling action between the roadbed and the retaining wall, and improve the anti-overturning and anti-slip capabilities of the retaining wall.

Description

Technical Field

[0001] The invention relates to the field of retaining wall design in soft soil areas, in particular to a self-anchored lightweight soil retaining wall for roadbed slopes in soft soil areas. Background Art

[0002] A retaining wall is a structure that supports roadbed fill or hillside soil, preventing deformation and instability. Its main structural types include gravity retaining walls, anchored retaining walls, buttress retaining walls, and reinforced earth retaining walls. Foundations in soft soil areas are generally silt and silty soil with relatively low bearing capacity. my country is a vast country, and soft soil foundations are unavoidable during construction. Gravity retaining walls and buttress retaining walls, which require higher bearing capacity, are not the best choices for roadbed-retaining wall construction on soft soil. Both types of retaining walls require soil replacement, gravel cushions, and artificial reinforcement such as sand piles. Commonly used anchored retaining walls and reinforced earth retaining walls, while lighter in weight, are more expensive and have high construction costs. Consequently, the existing types of retaining walls are not ideal for protecting existing soft soil foundations. Summary of the Invention

[0003] In order to solve the technical problem of poor comprehensive performance of soft soil foundation, the present invention provides a self-anchored lightweight soil retaining wall for roadbed slope in soft soil area.

[0004] The present invention is implemented by the following technical solution: a self-anchored lightweight soil retaining wall for roadbed slopes in soft soil areas, comprising: a first foundation on which a second foundation is placed, and a road surface is paved on the second foundation; two retaining wall bodies are symmetrically provided and stacked on both sides of the first and second foundations; a centralizing plate is provided on the retaining wall body, and one end of the centralizing plate extends into the first and second foundations; a plurality of grilles are provided, and corresponding grilles are connected to each other, and the grilles are provided in the second foundation and the retaining wall body;

[0005] As a further improvement to the above solution, a lightweight retaining wall requires a construction method:

[0006] The construction method includes the following steps:

[0007] S1: Excavate and level the original foundation, compact the soft foundation, and ensure that the foundation meets the minimum bearing capacity;

[0008] S2: Calculate the grid, the horizontal width and vertical length of each layer, design the usable area and size of the grid, and calculate the number of layers of grid to be laid on the roadbed, the width and length of each layer to be laid;

[0009] S3: When the roadbed is filled, when the first and second foundations are at the same height as the grid layer, the first layer of horizontal grid is laid according to the designed length, and the grid covers the entire surface;

[0010] S4: After the first layer of grid is laid and fixed, continue to fill the foundation 1 or foundation 2. At the same time, cement, on-site soil, and water are mixed with a foaming agent in a certain mass ratio to prepare foamed lightweight soil, which is directly poured inside the main panel of the retaining wall;

[0011] S4: Drainage pipes are arranged every 1.5-2m above the foundation layer. The length of the drainage pipe is 1-5cm longer than the horizontal width of the foundation layer above.

[0012] S5: Continue filling foundation 1 or foundation 2 and the retaining wall body. When the foamed lightweight soil of the retaining wall body has not yet dried and formed, lay the second layer of horizontal grids at the same height along the horizontal direction of the roadbed and the retaining wall body and anchor them;

[0013] S6: Continue filling foundation 1 or foundation 2. After the foam lightweight soil of the base layer reaches the specified strength, pour the prepared foam lightweight soil to the height of the upper grid layer in the main retaining wall.

[0014] S7: Repeat steps S3, S4, S5, and S6, layer by layer, until the specified road filling height is reached.

[0015] As a further improvement to the above scheme, the connections between foundation one, foundation two and the grille inside the retaining wall body are fixed, a connection point is set every 10-15 cm, the grille is tightened, the grille thickness is 3-10 mm, the longitudinal and transverse tensile yield strength per meter is 15-45 KN / m, and the longitudinal and transverse elongation is 13%-16%.

[0016] As a further improvement of the above scheme, in the retaining wall mix ratio, the soil accounts for 0-40, the concrete accounts for 20-50, and the thickness of the lightweight soil of the retaining wall body after filling and pouring is not less than 30cm.

[0017] As a further improvement of the above solution, the retaining wall body includes an innermost lightweight soil body, the outer side of the lightweight soil body is connected to a polymer protective layer, and the outer side of the polymer protective layer is wrapped with an oxide layer.

[0018] As a further improvement of the above scheme, the grille includes a horizontal grille, an inclined grille and a vertical grille. The horizontal grille, the inclined grille and the vertical grille are all composed of multiple pipe units. The horizontal grille is set horizontally, the vertical grille is set vertically, and the inclined grille is set obliquely.

[0019] As a further improvement of the above solution, the pipeline unit includes an innermost layer of high-strength steel wire, the steel wire is wrapped with polyethylene to form a steel-plastic composite rib, and the nodes are welded using a special ultrasonic process.

[0020] As a further improvement of the above scheme, the pipeline unit includes an outermost friction layer, to which a corrosion-resistant layer, a fiber layer and a plastic sleeve are connected in sequence, and a plurality of conducting cavities are provided on the plastic sleeve. The friction layer, the corrosion-resistant layer, the fiber layer and the plastic sleeve are provided with through water-permeable holes, which are connected to the plastic sleeve. A matching sleeve is connected to the plastic sleeve, and a plurality of weight-reducing holes are provided on the matching sleeve. The matching sleeve is connected to the water-permeable holes, the waterproof layer, the isolation layer and the steel cable in sequence, and some friction layers are connected with series pipes.

[0021] As a further improvement of the above solution, the bottom of the retaining wall body is connected to a grounding steel, which includes a transverse plate, both sides of which are connected to a clamping ring, and the bottom of which is fixedly connected to a vertical cone.

[0022] As a further improvement of the above scheme, the bottom of the retaining wall body is connected with a limiting component, which includes a force-bearing plate, which is fixedly connected to the bottom end of the retaining wall body, and the bottom of the force-bearing plate is slidably connected to a symmetrically arranged sliding steel plate, and the bottoms of the two sliding steel plates are respectively fixedly connected to a pressing rod 1 and a pressing rod 2, and the outer sides of the pressing rod 1 and the pressing rod 2 are slidingly sleeved with a volume box, and a volume cavity 1 and a volume cavity 2 are provided in the volume box, and a movable plate 1 fixedly connected to the pressing rod 1 is slidingly sleeved in the volume cavity 1, and a movable plate 2 slidingly sleeved with the volume cavity 2 is slidingly sleeved in the volume cavity 2, and the lower sides of the movable plate 2 and the movable plate 1 are fixedly connected with multiple high-pressure springs, and a conducting pipe is connected between the volume cavity 1 and the volume cavity 2, and the bottom of the volume box is fixedly connected with multiple telescopic rods and vertical rods, and the input end of the telescopic rod is connected to the volume cavity 1.

[0023] As a further improvement of the above scheme, the grilles are connected by nylon rope, polyester thread, U-shaped nails or connectors, so that each horizontal grille is connected to the longitudinal grille as a whole. The spacing between the horizontal grilles is 0.4-10.8m.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. By using foam lightweight soil as the main filler of the retaining wall, the retaining wall is lightweight and stable as a whole, and the requirements for the bearing capacity of the foundation are low, which reduces the need for additional reinforcement of the foundation. At the same time, through the joint action of multiple mechanisms, a good bite effect can be formed to control the displacement of soil particles, improve the overall strength and stability of the roadbed and retaining wall structure, increase the mutual pulling effect between the roadbed and the retaining wall, and improve the retaining wall's anti-overturning and anti-slip capabilities.

[0026] 2. Foam lightweight soil can simplify the pouring construction, save materials, reduce its own weight, effectively resist lateral deformation, improve the durability of the retaining wall, cooperate with the grid to bear the horizontal load, thereby improving the bearing capacity of the foundation, improving the bearing capacity of the retaining wall, inhibiting the soil arch effect, reducing the uneven settlement of the retaining wall in soft soil areas, and improving the overall stability of the retaining wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0028] Figure 2 The structure of the present invention is schematically shown Figure 2 ;

[0029] Figure 3 Schematic diagram of the overall structure of the grille;

[0030] Figure 4 for Figure 2 The enlarged structural diagram at B in the middle;

[0031] Figure 5 for Figure 3 A schematic diagram of the structure enlarged in the middle;

[0032] Figure 6 This is a schematic diagram of the grounded steel structure;

[0033] Figure 7 Schematic diagram of the main structure of the retaining wall in Example 2;

[0034] Figure 8 This is a schematic diagram of the local structure of the grid in Example 3;

[0035] Figure 9 This is a partial front view of the grille in Example 3;

[0036] Figure 10 This is a schematic diagram of the component structure defined in Example 4;

[0037] Figure 11 This is a schematic diagram of the main view of the components defined in Example 4.

[0038] Description of main symbols:

[0039] 01. Foundation 1; 02. Foundation 2; 03. Pavement; 04. Retaining wall body; 05. Drain pipe; 06. Concentrator plate; 07. Vertical grille; 08. Horizontal grille; 09. Inclined grille; 11. Series pipe; 17. Oxide layer; 18. Polymer protective layer; 19. Lightweight soil body; 20. Friction layer; 21. Corrosion-resistant layer; 22. Fiber layer; 23. Conducting cavity; 24. Plastic sleeve; 25. Weight reduction hole 1; 26. Shear sleeve; 27. Weight reduction hole 2; 28. Adhesive ring; 29. ​​Matching sleeve; 30. Waterproof layer; 31. Insulation layer; 32. Steel cable; 33. Water-permeable hole; 36. Horizontal plate; 37. Snap ring; 38. Vertical cone; 40. Force plate; 41. Volume chamber one; 42. Press rod one; 43. Telescopic rod; 44. Vertical rod; 45. Moving plate one; 46. Moving plate two; 47. Volume chamber two; 48. Press rod two; 49. Volume box; 50. High-pressure spring; 51. Sliding steel plate. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0041] Example 1: Please combine Figure 1-6 ,

[0042] A self-anchored lightweight soil retaining wall for a roadbed slope in a soft soil area comprises: a foundation 1 01, on which a foundation 2 02 is placed, and a road surface 03 is laid on the foundation 2 02. The foundation 1 01 and the foundation 2 02 are provided with multiple layers according to specific requirements to meet the corresponding foundation height requirements. The road surface 03 is the final road surface to achieve operation.

[0043] The retaining wall bodies 04 are symmetrically arranged in two pieces and are built on both sides of the foundation 1 01 and the foundation 2 02. The retaining wall bodies 04 provide support and blockage on both sides.

[0044] The centralizing plate 06 is provided on the retaining wall body 04. One end of the centralizing plate 06 extends into the foundation 1 01 and the foundation 2 02. The centralizing plate 06 provides centralized stability, and the drainage pipe 05 guides the flow to achieve internal water diversion.

[0045] There are multiple grilles, and the corresponding grilles are connected to each other. The grilles are set in 10, foundation 2 02 and retaining wall body 04. The grilles are force-supported to ensure the stability of foundation 1 01, foundation 2 02 and retaining wall body 04.

[0046] A lightweight retaining wall requires a construction method: the construction method includes the following steps:

[0047] S1: Excavate and level the original foundation, compact the soft foundation, and ensure that the foundation meets the minimum bearing capacity;

[0048] S2: Calculate the grid, the horizontal width and vertical length of each layer, design the usable area and size of the grid, and calculate the number of layers of grid to be laid on the roadbed, the width and length of each layer to be laid;

[0049] S3: Fill the roadbed and lay the panels. When the foundation 101 and foundation 202 are at the same height as the grid, lay the first layer of horizontal grid according to the designed length. The grid covers the entire surface.

[0050] S4: After the first layer of grid is laid and fixed, continue to fill the foundation 1 01 or foundation 2 02. At the same time, cement, on-site soil, and water are mixed with a foaming agent in a certain mass ratio to prepare foamed lightweight soil, which is directly poured inside the retaining wall main body 04 panel;

[0051] S4: Drainage pipes are arranged every 1.5-2 meters above the foundation layer of foundation 01. The length of the drainage pipe is 1-5 cm longer than the horizontal width of the foundation 01 layer above.

[0052] S5: Continue filling the foundation 1 01 or foundation 2 02 and the retaining wall body 04. When the foamed lightweight soil of the retaining wall body 04 has not yet dried and formed, lay the second layer of horizontal grids at the same height along the horizontal direction of the roadbed and the retaining wall body 04 and anchor them;

[0053] S6: Continue filling foundation 1 01 or foundation 2 02. After the foamed lightweight soil of the base layer reaches the specified strength, pour the prepared foamed lightweight soil to the height of the upper grid layer.

[0054] S7: Repeat steps S3, S4, S5, and S6, layer by layer, until the specified road filling height is reached.

[0055] The grilles at the connections between foundation 1 01, foundation 2 02 and retaining wall main body 04 are fixed, with a connection point set every 10-15 cm. The grilles are tightened, with a thickness of 3-10 mm. The longitudinal and transverse tensile yield strength per meter is 15-45 KN / m, and the longitudinal and transverse elongation is 13%-16%. After the grilles are subjected to corresponding limiting treatment, their pulling and support for foundation 1 01, foundation 2 02 and retaining wall main body 04 are guaranteed to ensure overall stability.

[0056] In the lightweight soil ratio of the retaining wall body 04, the proportion of soil is 0-40, and the proportion of concrete is 20-50. The thickness of the lightweight soil of the retaining wall body 04 after filling and pouring is not less than 30cm. Through on-site confirmation and changes in the construction environment, different ratios are achieved to meet the needs of pulling.

[0057] The grille includes a horizontal grille 08, an inclined grille 09 and a vertical grille 07. The horizontal grille 08, the inclined grille 09 and the vertical grille 07 are all composed of multiple pipe units. The horizontal grille 08 is set horizontally, the vertical grille 07 is set vertically, and the inclined grille 09 is set obliquely. By connecting multiple horizontal grilles 08, inclined grilles 09 and vertical grilles 07, stability of forces in different directions is achieved to ensure overall stability.

[0058] The pipeline unit includes an innermost layer of high-strength steel wire, which is wrapped with polyethylene to form steel-plastic composite ribs. The nodes are welded using a special ultrasonic process, and the steel wire is pulled accordingly to ensure stress. The polyethylene protects the internal steel wire and reduces rust.

[0059] The bottom of the retaining wall body 04 is connected to the grounding steel, which includes a transverse plate 36. The two sides of the transverse plate 36 are connected with a clamping ring 37. The bottom of the transverse plate 36 is fixedly connected with a vertical cone 38. The clamping ring 37 and the vertical cone 38 are limited by the transverse plate 36, and the bottom is limited by the vertical cone 38.

[0060] The grilles are connected by nylon rope, polyester thread or U-shaped nails, so that each section of horizontal grille is connected to the longitudinal grille as a whole. The spacing between horizontal grilles is 0.4-10.8m. Different methods are used to limit it according to needs to ensure the connection at the nodes.

[0061] The implementation principle of the embodiment of the present application is: using foam lightweight soil as the main filler of the retaining wall, and performing corresponding filling according to the height of foundation 1 01 and foundation 2 02. The grid is filled in the retaining wall and the roadbed. The soil material, lightweight soil retaining wall and roadbed filler work together to form a good bite effect, control the displacement of soil particles, improve the overall strength and stability of the roadbed and retaining wall structure, increase the mutual pulling effect between the roadbed and the retaining wall, and improve the retaining wall's anti-overturning and anti-slip capabilities. The lightweight soil retaining wall is used on both sides. At the same time, when filling, the interior is filled with a foaming agent to make it expand, thereby saving materials, reducing its own weight, and achieving lightweight blocking. The geogrids are crisscrossed in the middle to bear horizontal loads, thereby improving the bearing capacity of the foundation. At the same time, the grid can allow one or more layers of grids to bear horizontal thrust, thereby improving the bearing capacity of the retaining wall, suppressing the soil arch effect, reducing the uneven settlement of the retaining wall, and improving the overall stability of the retaining wall.

[0062] Example 2:

[0063] Combine Figure 1-7 Based on Example 1, this embodiment has the following further improvements:

[0064] The retaining wall body 04 includes an innermost lightweight soil body 19, and the outer side of the lightweight soil body 19 is connected to a polymer protective layer 18, and the outer side of the polymer protective layer 18 is wrapped with an oxide layer 17. By wrapping the polymer protective layer 18 and the oxide layer 17 on the outer side of the polymer protective layer 18, the damage to the lightweight soil body 19 by external animals and plants is reduced, and the slow corrosion of the lightweight soil body 19 by water flow, air or sunlight is reduced, thereby ensuring the stability of the support of the lightweight soil body 19.

[0065] Example 3:

[0066] Combine Figure 1-9 Based on Example 1, this embodiment has the following further improvements:

[0067] The pipeline unit includes an outermost friction layer 20, and the friction layer 20 is sequentially connected with a corrosion-resistant layer 21, a fiber layer 22 and a plastic sleeve 24. The plastic sleeve 24 is provided with a plurality of conducting cavities 23. The friction layer 20, the corrosion-resistant layer 21, the fiber layer 22 and the plastic sleeve 24 are provided with through water-permeable holes 33, and the water-permeable holes 33 are connected to the plastic sleeve 24. The plastic sleeve 24 is connected with a matching sleeve 29, and the matching sleeve 29 is provided with a plurality of weight-reducing holes 27. The matching sleeve 29 is sequentially connected with the water-permeable holes 33, the waterproof layer 30, the insulation layer 31 and the steel cable 32, wherein part of the friction layer 20 is provided with a plurality of weight-reducing holes 27. A series pipe 11 is connected between them, and the friction layer 20, the corrosion-resistant layer 21, and the fiber layer 22 perform corresponding functions of increasing wear, increasing elasticity, and preventing erosion. The plastic sleeve 24 and the matching sleeve 29 ensure shear force buffering and adaptation, and the adhesive ring 28 is isolated. At the same time, the protection of the waterproof layer 30 and the isolation layer 31 ensures the long-term stability of the steel cable 32 and avoids corrosion. At the same time, the water in the base layer can enter the conduction cavity 23 through multiple water-permeable holes 33, and can be transferred through the series pipe 11. Finally, it is discharged through the drain pipe 05 to reduce the water content in the base layer.

[0068] The implementation principle of the embodiment of the present application is: through multi-layer protection, the long-term stability of the vertical grille 07, the horizontal grille 08, and the inclined grille 09 is guaranteed, and at the same time, corresponding tension is provided to ensure the stability of the earth wall, and water can be diverted to accelerate the discharge of internal water and quickly reduce the internal water content, thereby ensuring the safety and stability of the entire wall and foundation.

[0069] Example 4:

[0070] Combine Figure 1 - Series pipe 11. This embodiment is further improved on the basis of embodiment 1 in that:

[0071] The bottom of the retaining wall body 04 is connected with a limiting component, which includes a load-bearing plate 40, which is fixedly connected to the bottom end of the retaining wall body 04, and a symmetrically arranged sliding steel plate 51 is slidably connected to the bottom of the two sliding steel plates 51. The bottoms of the two sliding steel plates 51 are respectively fixedly connected with a pressing rod 1 42 and a pressing rod 2 48. The outer sides of the pressing rod 1 42 and the pressing rod 2 48 are slidably sleeved with a volume box 49. The volume box 49 is provided with a volume cavity 1 41 and a volume cavity 2 47. A movable plate 1 45 fixedly connected to a pressing rod 1 42 is slidably sleeved in the volume chamber 1 41, and a movable plate 2 46 slidably sleeved in the volume chamber 2 47 is slidably sleeved. A plurality of high-pressure springs 50 are fixedly connected to the lower sides of the movable plate 2 46 and the movable plate 1 45. A conducting tube is connected between the volume chamber 1 41 and the volume chamber 2 47. A plurality of telescopic rods 43 and a vertical rod 44 are fixedly connected to the bottom of the volume box 49, and the input end of the telescopic rod 43 is communicated with the volume chamber 1 41.

[0072] The implementation principle of the embodiment of the present application is as follows: after the earth wall may tilt or one side may deform, the upper space in the volume chamber 41 on one side can be increased, thereby allowing the liquid in the volume chamber 41 to enter the telescopic rod 43, causing the telescopic rod 43 to extend. Under the action of the bottom soil, reverse stress is achieved, reducing the overturning speed. At the same time, the telescopic rod 43 is inserted deeper to ensure the support of the bottom.

[0073] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A self-anchored lightweight soil retaining wall for roadbed slope in soft soil areas, characterized in that: include: Foundation 1, on which foundation 2 is placed, and on which a road surface is paved; The retaining wall body is symmetrically arranged in two pieces and is built on both sides of the first foundation and the second foundation; a centralizing plate, which is provided on the retaining wall body, wherein one end of the centralizing plate extends into the first foundation and the second foundation; A plurality of grids are provided, and corresponding grids are connected to each other, and the grids are provided in the first foundation, the second foundation and the retaining wall body; Among them, lightweight soil retaining wall requires a construction method to achieve: The construction method comprises the following steps: S1: Excavate and level the original foundation, compact the soft foundation, and ensure that the foundation meets the minimum bearing capacity; S2: Calculate the grid, the horizontal width and vertical length of each layer, design the usable area and size of the grid, and calculate the number of layers of grid to be laid on the roadbed, the width and length of each layer to be laid; S3: Roadbed filling. When foundation 1 and foundation 2 are filled at the height of the first layer of grid, the first layer of horizontal grid is laid according to the designed length, and the grid covers the entire surface. S4: After the first layer of grid is laid and fixed, continue to fill the foundation 1 or foundation 2. At the same time, cement, on-site soil, and water are mixed with a foaming agent in a certain mass ratio to prepare foamed lightweight soil, which is directly poured inside the main panel of the retaining wall; S4: Drainage pipes are arranged every 1.5-2m above the foundation layer. The length of the drainage pipes is 1-5cm longer than the horizontal width of the foundation layer above. S5: Continue filling foundation 1 or foundation 2 and the retaining wall body. When the foamed lightweight soil in the retaining wall body has not yet dried and formed, lay the second layer of horizontal grids at the same height along the horizontal direction of the roadbed and the retaining wall body and anchor them; S6: Continue filling foundation 1 or foundation 2. After the foam lightweight soil of the base layer reaches the specified strength, pour the prepared foam lightweight soil to the height of the upper grid layer in the main retaining wall. S7: Repeat steps S3, S4, S5, and S6, layer by layer, until the specified road filling height is reached; The grille includes a horizontal grille, an inclined grille and a vertical grille, each of which is composed of a plurality of pipe units. The horizontal grille is arranged horizontally, the vertical grille is arranged vertically, and the inclined grille is arranged obliquely. The pipeline unit includes an outermost friction layer, the friction layer is sequentially connected to a corrosion-resistant layer, a fiber layer and a plastic sleeve, the plastic sleeve is provided with a plurality of conducting cavities, the friction layer, the corrosion-resistant layer, the fiber layer and the plastic sleeve are provided with through water holes, the water holes are connected to the plastic sleeve, the plastic sleeve is connected to a matching sleeve, the matching sleeve is provided with a plurality of weight-reducing holes 2, the matching sleeve is sequentially connected to the water holes, the waterproof layer, the insulation layer and the steel cable, wherein some friction layers are connected with series pipes; The water in the base layer can enter the conduction cavity through multiple water-permeable holes, and can be transferred through the series pipes at the same time, and finally discharged through the drainage pipe.

2. The self-anchored lightweight soil retaining wall for roadbed slope in soft soil area according to claim 1, characterized in that: The connections between foundation 1, foundation 2 and the grille inside the retaining wall body are fixed, with a connection point set every 10-15 cm. The grille is tightened, the grille thickness is 3-10 mm, the longitudinal and transverse tensile yield strength per meter is 15-45 KN / m, and the longitudinal and transverse elongation is 13%-16%.

3. The self-anchored lightweight soil retaining wall for roadbed slope in soft soil area according to claim 1, characterized in that: The retaining wall body comprises an innermost lightweight soil body, the outer side of the lightweight soil body is connected to a polymer protective layer, and the outer side of the polymer protective layer is wrapped with an oxide layer.

4. The self-anchored lightweight soil retaining wall for roadbed slope in soft soil area according to claim 1, characterized in that: The bottom of the retaining wall body is connected with a grounding steel, and the grounding steel includes a transverse plate, both sides of the transverse plate are connected with a clamping ring, and the bottom of the transverse plate is fixedly connected with a vertical cone.

5. The self-anchored lightweight soil retaining wall for roadbed slope in soft soil area according to claim 4, characterized in that: The top end face of said sliding panel also is provided with an interlocking structure, and the interlocking structures include two guide rails which are connected as follows: a) there is a link between the end of the sliding panel and the other end of the sliding panel, and b) there is a link between the end of the sliding panel and the other end of the sliding panel.

6. The self-anchored lightweight soil retaining wall for roadbed slope in soft soil area according to claim 4, characterized in that: The grilles are connected with U-shaped nails to connect each section of horizontal grille with the longitudinal grille into a whole. The spacing between the horizontal grilles is 0.4-10.8m.

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