Wrapping type reinforced earth retaining wall structure

Abstract

The utility model discloses a wrapping type reinforced earth retaining wall structure, and relates to the technical field of geotechnical engineering earth slope retaining structures. Comprising a ground beam, a wall panel located above the ground beam, filler located on the back face of the wall panel and multiple layers of tie bars arranged in the filler in parallel. The wall panel is formed by stacking a plurality of drainage blind pipes with rectangular sections, the drainage blind pipes are filled with ecological bags, and the surfaces of the drainage blind pipes are of porous structures; every two layers of drainage blind pipes are stacked up and down to form a layer of panel unit, and a gap is reserved between every two groups of panel units which are adjacent up and down; each layer of panel unit is wrapped by the corresponding tie bar; the drainage blind pipes and the ground beam are connected and fixed through U-shaped nails, and every two adjacent drainage blind pipes are connected and fixed through U-shaped nails. The retaining wall panel is formed by the drainage blind pipes, so that the use amount of concrete can be reduced; ecological bags filled with nutrient soil and plant seeds are arranged in gaps in the drainage blind pipes, and a good environment foundation can be provided for construction of the ecological environment.

Description

Technical Field

[0001] The utility model relates to the technical field of soil slope retaining structures in geotechnical engineering, in particular to a wrapped reinforced soil retaining wall structure. Background Art

[0002] The reinforced earth retaining wall is a composite structure composed of panels, fillers, and reinforcement materials. It uses the friction between the reinforcement and the soil to improve the deformation and engineering properties of the soil, and is used to improve the stability of the soil. It is widely used in engineering fields such as railway and highway roadbeds and slopes, ports, reservoirs, coal mines, and freight yards.

[0003] The face plate of reinforced earth retaining wall is generally made of reinforced concrete material. This type of face plate is a rigid face plate, and its engineering mechanical properties are less affected by external factors. Filler is one of the main materials of reinforced earth, and is generally made from local materials, such as mountain soil, crushed stone soil, sand and gravel near the project site. Reinforcement is another main material that makes up the structure of reinforced earth retaining wall. At present, the most widely used reinforcement material in reinforced earth retaining wall is geogrid.

[0004] With the spread and development of sustainable development ideas, people's understanding of ecological engineering and ecological architecture has been continuously deepened and they have tried to apply them to practical projects. Under this situation, the concepts of ecological retaining walls and ecological supports have attracted more and more attention. The rigid concrete panels of traditional reinforced earth retaining walls are heavy, have poor ecological effects, and cannot meet ecological requirements. Utility Model Content

[0005] The main purpose of the utility model is to provide a wrapped reinforced earth retaining wall structure to solve the above problems.

[0006] To achieve the above-mentioned purpose, the utility model provides a wrapped reinforced earth retaining wall structure, including a ground beam, a wall panel located above the ground beam, a filler located on the back of the wall panel, and multiple layers of tie bars arranged in parallel in the filler; the wall panel is formed by stacking a number of drainage blind pipes with rectangular cross-sections, the interior of the drainage blind pipes is filled with eco-bags, and the surface of the drainage blind pipes is a porous structure; every two layers of drainage blind pipes are stacked up and down to form a layer of panel units, and a gap is reserved between two adjacent groups of panel units; each layer of panel units is wrapped by corresponding tie bars; the drainage blind pipes and the ground beams, as well as between two adjacent sections of drainage blind pipes, are connected and fixed by U-shaped nails.

[0007] Furthermore, the vertical spacing of the tie bars is consistent with the height of the two layers of drainage blind pipes.

[0008] Furthermore, the reinforcement is a unidirectional geogrid made of high-density polyethylene.

[0009] Furthermore, the ecological bag contains nutrient soil and grass seeds.

[0010] Furthermore, an anti-seepage geotextile is provided between the filler and the wall panel.

[0011] Furthermore, the drainage blind pipes are installed with staggered seams.

[0012] Furthermore, the filler is composed of foam lightweight soil and ordinary backfill soil, and the interface between the two fillers is a step surface.

[0013] Furthermore, the position of the step surface is set at the potential rupture surface of the retaining wall calculated according to the "0.3H method" under a single ordinary backfill soil condition.

[0014] The utility model has the following beneficial effects:

[0015] 1. Using drainage blind pipes to form retaining wall panels can reduce the amount of concrete used;

[0016] 2. The internal gap of the drainage blind pipe is an ecological bag filled with nutrient soil and plant seeds, which can provide a good environmental foundation for the construction of the ecological environment;

[0017] 3. Using foam lightweight soil as the filling material in the active area of ​​the retaining wall can reduce the soil pressure of the active area soil on the wall panel, reduce the tension that the reinforcement in the anchoring area needs to balance, and thus reduce the laying length of the reinforcement, thereby ensuring the internal and external stability of the retaining wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of a wrapped reinforced earth retaining wall structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the reinforcement wrapping scheme of the panel unit of a wrapped reinforced earth retaining wall structure of the utility model.

[0020] Figure 3 It is a schematic diagram of the assembly of wall panels of a wrapped reinforced earth retaining wall structure of the utility model.

[0021] Figure 4 The utility model is a schematic diagram of a drainage blind pipe connection of a wrapped reinforced earth retaining wall structure.

[0022] Among them, 1-ground beam; 2-drainage blind pipe; 3-ecological bag; 4-anti-seepage geotextile; 5-filler; 6-foam lightweight soil; 7-ordinary backfill soil; 8-tensioning rod; 9-U-shaped nail. DETAILED DESCRIPTION

[0023] In order to achieve the above-mentioned purpose and effect, the technical means and structure adopted by the utility model are described in detail with reference to the accompanying drawings for the preferred embodiments of the utility model and their features and functions.

[0024] like Figure 1-4 As shown, the utility model provides a wrapped reinforced earth retaining wall structure, including a longitudinally arranged ground beam 1, the ground beam 1 is a cast-in-place concrete structure, a plurality of drainage blind pipes 2 with rectangular cross-sections are staggered and stacked on the ground beam 1 to form a flexible wall panel, the outer side of the wall panel is ecologically sprayed, the holes inside the drainage blind pipe 2 are filled with ecological bags 3, and the ecological bags 3 are filled with nutrient soil and grass seeds, which can ensure the ecology of the structure while appropriately improving the stability of the structure, and the surface of the drainage blind pipe 2 is a porous structure, which can provide a channel for the plants in the ecological bag 3 to grow toward the outside of the wall panel; behind the drainage blind pipe 2 is an anti-seepage geotextile 4, which plays an anti-seepage role, and behind the anti-seepage geotextile 4 is a filler 5, which is composed of foam lightweight soil 6 and ordinary backfill soil 7, which reduces the additional load on the foundation and the soil load acting on the wall panel by the soil in the activity area Pressure, the interface between the two is stepped, and the position of the step surface is set at the potential rupture surface of the retaining wall calculated according to the "0.3H method" under a single ordinary backfill soil condition; the tie bar 8 is a unidirectional geogrid made of high-density polyethylene and is horizontally laid inside the filler 5, and two layers of drainage blind pipes 2 are stacked up and down to form a layer of panel units. A gap is reserved between two adjacent groups of panel units. The tie bar 8 extends to the outside of the panel unit through the gap reserved below a group of panel units, and is wrapped around the outside of the group of panel units, and then extends from the reserved gap above the group of panel units to the back of the panel unit and is laid inside the filler 5 behind the panel unit. The vertical spacing of the tie bar 8 is the same as the height of a group of panel units. The drainage blind pipe 2 and the ground beam 1 and the two adjacent sections of the drainage blind pipe 2 are connected and fixed to each other with U-shaped nails 9.

[0025] By adopting the above technical solution, the foam lightweight soil 6 is used as the filler of the active area of ​​the retaining wall. Compared with ordinary backfill soil, the bulk density of the foam lightweight soil 6 can be reduced by nearly half, and it has the characteristics of high strength and strong integrity. According to the soil pressure calculation theory, the foam lightweight soil 6 is used as the filler of the active area to reduce the soil pressure of the active area of ​​the retaining wall on the flexible wall panel. Since this part of the soil pressure needs to rely on the friction balance between the reinforcement 8 and the active area, according to the reinforcement theory, this method can also reduce the laying length of the reinforcement 8, and has a good promotion prospect.

[0026] The utility model also provides a construction method of a wrapped reinforced earth retaining wall structure, comprising the following steps:

[0027] S1. Excavation of foundation pit to the bottom of the foundation pit;

[0028] S2, pouring the ground beam 1, setting a reserved U-shaped nail 9 on the ground beam 1, and processing the foundation soil layer behind the ground beam 1;

[0029] S3, laying a layer of tie bars 8 on the surface of the foundation soil layer behind the ground beam 1, with one end of the tie bars 8 located at a designated position of the foundation soil layer behind the ground beam 1, and the other end located in front of the ground beam 1;

[0030] S4. Two layers of drainage blind pipes 2 with eco-bags 3 in the holes are staggered on the tie bars 8 on the ground beam 1. The drainage blind pipes 2 and the ground beam 1 and two adjacent sections of the drainage blind pipes 2 are connected with tie ties or U-shaped nails 9;

[0031] S5. Lay a layer of ordinary backfill soil 7 on the reinforcing bar 8 behind the ground beam 1, construct a step-shaped interface at the junction with the foam lightweight soil 6, and compact the ordinary backfill soil 7 according to the design requirements;

[0032] S6, pouring foamed lightweight soil 6 at a predetermined position behind the wall panel;

[0033] S7, wrap the tie rod 8 at the outer end position in front of the ground beam 1 on the outer surface of the two layers of drainage blind pipe 2, and lay the remaining tie rod 8 on the surface of the filler 5, connect the tie rod 8 and the drainage blind pipe 2 with U-shaped nails 9, tighten the tie rod 8, and fix the tie rod 8 with U-shaped nails 9;

[0034] S8, repeat steps S3-S7 to perform stacking construction;

[0035] S9. When the retaining wall is constructed to the designed height, spray ecological spray on the outside of the formed wall panel.

[0036] The above description is only the preferred embodiment of the utility model, not all embodiments. Anyone should be aware that structural changes made under the inspiration of the utility model, and all technical solutions that are the same or similar to the utility model, belong to the protection scope of the utility model.

Claims

1. A wrapped reinforced earth retaining wall structure, comprising a ground beam, a wall panel located above the ground beam, a filler located on the back of the wall panel, and multiple layers of tie bars arranged in parallel in the filler; characterized in that: The wall panel is formed by stacking a number of drainage blind pipes with rectangular cross-sections, the interior of the drainage blind pipes is filled with eco-bags, and the surface of the drainage blind pipes is a porous structure; every two layers of drainage blind pipes are stacked up and down to form a panel unit, and a gap is reserved between two adjacent groups of panel units; each layer of panel units is wrapped by corresponding tension bars; the drainage blind pipes and the ground beams, as well as the two adjacent sections of drainage blind pipes, are connected and fixed by U-shaped nails.

2. A wrapped reinforced earth retaining wall structure as claimed in claim 1, characterized in that: The vertical spacing of the tie bars is consistent with the height of the two layers of drainage blind pipes.

3. A wrapped reinforced earth retaining wall structure as claimed in claim 1 or 2, characterized in that: The reinforcement is a unidirectional geogrid made of high-density polyethylene.

4. The wrapped reinforced earth retaining wall structure according to claim 1, characterized in that: The ecological bag contains nutrient soil and grass seeds.

5. The wrapped reinforced earth retaining wall structure according to claim 1, characterized in that: An anti-seepage geotextile is arranged between the filler and the wall panel.

6. The wrapped reinforced earth retaining wall structure according to claim 1, characterized in that: The drainage blind pipes are installed with staggered seams.

7. The wrapped reinforced earth retaining wall structure according to claim 1, characterized in that: The filler is composed of foam lightweight soil and ordinary backfill soil, and the interface between the two fillers is a step surface.

8. A wrapped reinforced earth retaining wall structure as claimed in claim 7, characterized in that: The location of the step surface is set at the potential rupture surface of the retaining wall calculated according to the "0.3H method" under a single ordinary backfill soil condition.

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