Soft soil area roadbed slope self-anchored light soil retaining wall

Abstract

The invention relates to the field of soft soil area retaining wall design, and discloses a soft soil area roadbed slope self-anchored light soil retaining wall which comprises a first foundation, a second foundation is placed on the first foundation, and a road surface is laid on the second foundation; the two retaining wall bodies are symmetrically arranged and are piled on the two sides of the first foundation and the two sides of the second foundation; the concentration plate is arranged on the retaining wall main body, and one end of the concentration plate extends into the foundation I and the foundation II; the multiple grids are arranged, the corresponding grids are connected with one another, and the grids are arranged in the second foundation and the retaining wall body. Additional reinforcement treatment on the foundation is reduced, meanwhile, through the combined action of various mechanisms, a good meshing effect can be formed, displacement of soil particles is controlled, and the overall strength and stability of the roadbed and retaining wall structure are improved; the mutual traction effect of the roadbed and the retaining wall is increased, and the anti-overturning and anti-sliding capacity of the retaining wall is improved.

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] Retaining wall refers to a structure that supports the roadbed fill or hillside soil and prevents the fill or soil from deforming and becoming unstable. Its main structural types are: gravity retaining wall, anchor retaining wall, buttress retaining wall, reinforced soil retaining wall, etc. The foundation in soft soil areas is generally silt and silty soil with relatively low bearing capacity. my country has a vast territory and it is inevitable to encounter soft soil foundations during construction. The construction of roadbed-retaining wall on soft soil foundation requires high bearing capacity of gravity retaining wall and buttress retaining wall, which are not the best choice. If these two types of retaining walls are selected, they need to be replaced with soil, set up gravel cushion layer and sand piles and other artificial reinforcements. The commonly used anchor retaining wall and reinforced soil retaining wall have light weight, but they are economically expensive and have high engineering costs. Therefore, the existing types cannot well meet the protection of 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 scheme: a self-anchored lightweight soil retaining wall for roadbed slope in soft soil area, comprising: a foundation 1, on which a foundation 2 is placed, and a road surface is paved on the foundation 2; a retaining wall body, which is symmetrically arranged with two, and which are stacked on both sides of the foundation 1 and the foundation 2; a centralizing plate, which is arranged on the retaining wall body, and one end of the centralizing plate extends into the foundation 1 and the foundation 2; a plurality of grids are arranged, and the corresponding grids are connected to each other, and the grids are arranged in the foundation 2 and the retaining wall body;

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

[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 use 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, 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, and at the same time, mix cement, on-site soil, water and 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 to fill the foundation 1 or foundation 2 and the main body of the retaining wall. When the foamed lightweight soil of the main body of the retaining wall has not yet dried and formed, lay the second layer of horizontal grids at the same height in the horizontal direction of the roadbed and the main body of the retaining wall and anchor them;

[0013] S6: Continue to fill 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 of 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 10-15cm, the grille is tightened, the grille thickness is 3-10mm, the longitudinal and transverse tensile yield strength per meter is 15-45KN / m, and the longitudinal and transverse elongation is 13%-16%.

[0016] As a further improvement of the above scheme, in the retaining wall mix, the proportion of soil is 0-40, the proportion of concrete is 20-50, and the thickness of 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 pipeline units. The horizontal grille is arranged horizontally, the vertical grille is arranged vertically, and the inclined grille is arranged inclinedly.

[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, a plurality of conducting cavities are provided on the plastic sleeve, and through water-permeable holes are provided on the friction layer, the corrosion-resistant layer, the fiber layer and the plastic sleeve, the water-permeable holes are communicated with the plastic sleeve, a matching sleeve is connected in the plastic sleeve, a plurality of weight-reducing holes are provided on the matching sleeve, and water-permeable holes, a waterproof layer, an insulating layer and a steel cable are connected in sequence in the matching sleeve, wherein series pipes are connected between some of the friction layers.

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

[0022] As a further improvement of the above scheme, a limiting component is connected to the bottom of the retaining wall body, and the limiting component includes a load-bearing plate, which is fixedly connected to the bottom end of the retaining wall body, and a symmetrically arranged sliding steel plate is slidably connected to the bottom of the load-bearing plate. 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 slidably sleeved with a volume box, and a volume chamber 1 and a volume chamber 2 are arranged in the volume box. A moving plate 1 fixedly connected to the pressing rod 1 is slidably sleeved in the volume chamber 1, and a moving plate 2 slidably sleeved in the volume chamber 2 is slidably sleeved in the volume chamber 2. A plurality of high-pressure springs are fixedly connected to the lower sides of the moving plate 2 and the moving plate 1, and a conducting pipe is connected between the volume chamber 1 and the volume chamber 2. A plurality of telescopic rods and vertical rods are fixedly connected to the bottom of the volume box, and the input end of the telescopic rod is connected to the volume chamber 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 section of the 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, it is made lightweight and stable as a whole, and at the same time, the requirements for the bearing capacity of the foundation are low, reducing 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 ability to resist overturning and sliding.

[0026] 2. Foam lightweight soil can make pouring construction simple, save materials, reduce deadweight, effectively resist lateral deformation, improve the durability of retaining walls, cooperate with grids to bear horizontal loads, thereby improving the bearing capacity of foundations, improving the bearing capacity of retaining walls, inhibiting soil arch effect, reducing uneven settlement of retaining walls in soft soil areas, and improving the overall stability of retaining walls. 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 is a 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 The enlarged structural diagram at A in the middle;

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

[0033] Figure 7 This is a 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 grille in Example 3;

[0035] Fig. 9 It is a partial front view schematic diagram of the grille in Example 3;

[0036] Fig.10 This is a schematic diagram of the structure of components defined in Example 4;

[0037] Fig.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. Road surface; 04. Retaining wall body; 05. Drain pipe; 06. Concentrator plate; 07. Vertical grille; 08. Horizontal grille; 09. Inclined grille; 11. Series pipe; 17. Oxidation 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. Insulating 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 is 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 a new embodiment.

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

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

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

[0044] The centralizing plate 06 is arranged on the retaining wall body 04, and one end of the centralizing plate 06 extends into the foundation 1 01 and the foundation 2 02. The centralizing plate 06 performs central stabilization, and the drainage pipe 05 performs diversion to realize the 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 use 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 horizontal grid according to the designed length, and 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, and at the same time, mix cement, on-site soil, water and 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 1.5-2m above the foundation layer of foundation 01. The length of the drainage pipe is 1-5cm longer than the horizontal width of the foundation 01 one layer above;

[0052] S5: Continue to fill 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 dried and formed, lay the second layer of horizontal grids at the same height in the horizontal direction of the roadbed and the retaining wall body 04 and anchor them;

[0053] S6: Continue to fill the 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 in the retaining wall body 04;

[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 connection points between foundation 1 01, foundation 2 02 and retaining wall main body 04 are fixed, a connection point is set every 10-15cm, the grilles are tightened, the grille thickness is 3-10mm, the longitudinal and transverse tensile yield strength per meter is 15-45KN / m, the longitudinal and transverse elongation is 13%-16%, and the grilles are subjected to corresponding limiting treatment to ensure their pulling and support for foundation 1 01, foundation 2 02 and retaining wall main body 04, thereby ensuring the 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 horizontally arranged, the vertical grille 07 is vertically arranged, and the inclined grille 09 is inclinedly arranged. By connecting multiple horizontal grilles 08, inclined grilles 09 and vertical grilles 07, the stability of forces in different directions is achieved to ensure the 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 a grounding steel, which includes a transverse plate 36. The two sides of the transverse plate 36 are connected to a clamping ring 37. The bottom of the transverse plate 36 is fixedly connected to 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 with nylon ropes, polyester thread stitching or U-shaped nails to connect each section of horizontal grille with 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 filling material 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 filling material can 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 grids 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] Embodiment 2:

[0063] Combination Figure 1-7 Based on Example 1, this embodiment is further improved in that:

[0064] The retaining wall body 04 includes an innermost lightweight soil body 19, the outer side of the lightweight soil body 19 is connected with 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] Embodiment 3:

[0066] Combination Figure 1-9 Based on Example 1, this embodiment is further improved in that:

[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, and a plurality of conducting cavities 23 are arranged on the plastic sleeve 24. 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 with the plastic sleeve 24. The plastic sleeve 24 is connected with a matching sleeve 29, and a plurality of weight-reducing holes 27 are arranged on the matching sleeve 29. The matching sleeve 29 is sequentially connected with the water-permeable holes 33, a waterproof layer 30, an insulating layer 31 and a steel cable 32, wherein part of the friction layer 20 A series pipe 11 is connected in between, 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 insulating layer 31 ensures the long-term stability of the steel cable 32 to avoid 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, the corresponding pulling force is provided to ensure the stability of the earth wall, and water diversion can be carried out 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] Embodiment 4:

[0070] Combination Figure 1 - Series pipe 11, based on the embodiment 1, this embodiment is further improved 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 the bottom of the load-bearing plate 40 is slidably connected with a symmetrically arranged sliding steel plate 51, and 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, and the outer sides of the pressing rod 1 42 and the pressing rod 2 48 are slidably sleeved with a volume box 49, and the volume box 49 is provided with a volume cavity 1 41 and a volume cavity 2 47, and the volume cavity A movable plate 45 fixedly connected to a pressing rod 42 is slidably sleeved in the volume chamber 1 41, a movable plate 46 slidably sleeved with the volume chamber 2 47 is slidably sleeved in the volume chamber 2 47, 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 connected to 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, so that the liquid in the volume chamber 41 enters 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, and at the same time, the telescopic rod 43 is inserted deeper to ensure the support of the bottom.

[0073] The above-mentioned 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 substitutions made by technicians in this field on the basis of the present invention shall 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 with two of them, and is built on both sides of the first foundation and the second foundation; A centralizing plate, which is arranged on the retaining wall body, and 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 foundation 2 and the retaining wall body; The lightweight 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 use 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: When the roadbed is filled, when the first and second foundations are at the same height as the 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, and at the same time, mix cement, on-site soil, water and 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 pipe is 1-5cm longer than the horizontal width of the foundation layer above. S5: Continue to fill the foundation 1 or foundation 2 and the main body of the retaining wall. When the foamed lightweight soil in the main body of the retaining wall has not yet dried and formed, lay the second layer of horizontal grids at the same height in the horizontal direction of the roadbed and the main body of the retaining wall and anchor them; S6: Continue to fill 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.

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

3. A self-anchored lightweight soil retaining wall for roadbed slope in soft soil area as claimed in claim 1, characterized in that: In the retaining wall mix, soil accounts for 0-40%, concrete accounts for 20-50%, and the thickness of lightweight soil of the retaining wall body after filling and pouring is not less than 30cm.

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

5. The self-anchored lightweight soil retaining wall for roadbed slope in soft soil area as claimed in claim 1, characterized in that: The grille comprises a horizontal grille, an inclined grille and a vertical grille, each of which is composed of a plurality of pipeline units. The horizontal grille is arranged horizontally, the vertical grille is arranged vertically, and the inclined grille is arranged obliquely.

6. A self-anchored lightweight soil retaining wall for roadbed slope in soft soil area as claimed in claim 5, characterized in that: 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.

7. A self-anchored lightweight soil retaining wall for roadbed slope in soft soil area as claimed in claim 5, characterized in that: 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, and the water-permeable holes are communicated with 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 with water-permeable holes, a waterproof layer, an insulating layer and a steel cable in sequence, and series pipes are connected between some friction layers.

8. The self-anchored lightweight soil retaining wall for roadbed slope in soft soil area as claimed in 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, and both sides of the transverse plate are connected with a clamping ring, and the bottom is fixedly connected with a vertical cone.

9. A self-anchored lightweight soil retaining wall for roadbed slope in soft soil area as claimed in claim 8, characterized in that: The bottom of the retaining wall body is connected with a limiting component, and the limiting component includes a load-bearing plate, which is fixedly connected to the bottom end of the retaining wall body, and the bottom of the load-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 slidably sleeved with a volume box, and the volume box is provided with a volume cavity 1 and a volume cavity 2, and a movable plate 1 fixedly connected to the pressing rod 1 is slidably sleeved in the volume cavity 1, and a movable plate 2 slidably sleeved in the volume cavity 2 is slidably sleeved with the volume cavity 2, and the lower sides of the movable plate 2 and the movable plate 1 are fixedly connected with a plurality of 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 a plurality of telescopic rods and a vertical rod, and the input end of the telescopic rod is communicated with the volume cavity 1.

10. A self-anchored lightweight soil retaining wall for roadbed slope in soft soil area as claimed in claim 8, characterized in that: The grids are connected by nylon ropes, polyester thread stitching, U-shaped nails or connectors, so that each section of the horizontal grid is connected to the longitudinal grid as a whole, and the spacing between the horizontal grids is 0.4-10.8m.

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