Protective structure for expansive soil side slope

Abstract

The utility model relates to the technical field of side slope protection, in particular to a protection structure for an expansive soil side slope, which comprises a first intercepting ditch arranged at the top of the slope, a second intercepting ditch arranged at the bottom of the slope and an earthwork standard room vegetation blanket assembly arranged on the slope surface, and a vegetation fiber blanket is arranged on the surface of the slope surface through anchoring nails. The geocell is arranged on the surface of the plant-growing fiber blanket through the connecting fasteners, the plant-growing fiber blanket is provided with plant-growing substrates and plant-growing seeds, and the plant-growing substrates and the plant-growing seeds are distributed in grids of the geocell. The vegetation matrix and the vegetation seeds are blocked by grids of the geocell, so that the possibility of loss of the vegetation matrix and the vegetation seeds is effectively reduced, and the protection capability of the side slope is improved; and the first intercepting ditch, the second intercepting ditch, the geocell vegetation blanket assembly and the retaining wall jointly form a protection system of the expansive soil side slope, so that the protection capability of the side slope is remarkably improved, and the stability of the side slope is ensured.

Description

Technical Field

[0001] This utility model relates to the field of slope protection technology, and in particular to a protective structure for expansive soil slopes. Background Technology

[0002] Expansive soil refers to cohesive soil that expands dramatically in volume when soaked in water and shrinks significantly in volume when dehydrated. It has characteristics such as swelling upon absorbing water, shrinking upon losing water, repeated swelling and shrinkage deformation, decreased bearing capacity when soaked in water, and development of drying shrinkage cracks, making it extremely unstable.

[0003] Expansive soil slopes refer to slopes whose surface is mainly expansive soil. Currently, the main protection method for expansive soil slopes is to plant vegetation on the slope. However, in the early stages of vegetation planting, the vegetation substrate and seeds are easily lost, resulting in a very low survival rate of vegetation. After the slope is established, the vegetation is sparse, which leads to weak slope resistance and poor slope protection, making the slope prone to instability. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a protective structure for expansive soil slopes with better protection capabilities.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a protective structure for expansive soil slopes, including a first intercepting ditch set at the top of the slope, a second intercepting ditch set at the bottom of the slope, and a geocell vegetation mat assembly set on the slope surface. The geocell vegetation mat assembly includes a vegetation fiber mat and geocells. The vegetation fiber mat is set on the slope surface by anchoring nails, and the geocells are set on the surface of the vegetation fiber mat by connecting fasteners. The vegetation fiber mat is provided with vegetation substrate and vegetation seeds, and the vegetation substrate and vegetation seeds are distributed in each grid of the geocell.

[0006] A retaining wall is installed at the bottom of the slope to prevent the slope from sliding down.

[0007] Furthermore, the connecting fastener is a U-shaped connecting fastener.

[0008] Furthermore, the outer surface of the retaining wall is covered with an impermeable clay layer.

[0009] Furthermore, the retaining wall includes a back wall, which consists of, from top to bottom, an impermeable clay layer, a gravel layer, an impermeable geotextile layer, and a lime-soil layer.

[0010] Furthermore, drainage pipes were installed in the gravel layer.

[0011] The beneficial effects of this utility model are as follows: By setting a geocell vegetation mat assembly on the slope, the geocell vegetation mat assembly includes a vegetation fiber mat and geocells. The vegetation fiber mat is set on the slope surface by anchoring nails, and the geocells are set on the surface of the vegetation fiber mat by connecting fasteners. The vegetation fiber mat is provided with vegetation substrate and vegetation seeds, and the vegetation substrate and vegetation seeds are distributed in each grid of the geocell. The vegetation substrate and vegetation seeds are blocked by the grid of the geocell, which effectively reduces the possibility of vegetation substrate and vegetation seeds being lost, ensures the vegetation formation effect, and improves the slope protection capacity. In addition, the first intercepting ditch at the top of the slope and the second intercepting ditch at the bottom of the slope reduce the erosion of the slope by rainwater. A retaining wall is set at the bottom of the slope, which can block the thrust of the slope sliding down. The first intercepting ditch, the second intercepting ditch, the geocell vegetation mat assembly and the retaining wall together constitute the protection system of the expansive soil slope, thereby significantly improving the slope protection capacity and ensuring the slope stability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the present invention;

[0013] Figure 2 This is a schematic diagram of a geocell vegetation blanket assembly;

[0014] The following are marked as follows: First intercepting ditch 1, Second intercepting ditch 2, Geocell vegetation blanket assembly 3, Vegetation fiber blanket 31, Geocell 32, Grid 321, Anchor nail 33, Connecting fastener 34, Retaining wall 4, Impermeable clay layer 41, Gravel layer 42, Impermeable geotextile layer 43, Lime soil layer 44. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0016] like Figure 1 and Figure 2 As shown, the present invention provides a protective structure for expansive soil slopes, including a first intercepting ditch 1 set at the top of the slope, a second intercepting ditch 2 set at the bottom of the slope, and a geocell vegetation mat assembly 3 set on the slope surface. The geocell vegetation mat assembly 3 includes a vegetation fiber mat 31 and geocells 32. The vegetation fiber mat 31 is set on the slope surface by anchor nails 33, and the geocells 32 are set on the surface of the vegetation fiber mat 31 by connecting fasteners 34. The vegetation fiber mat 31 is provided with vegetation substrate and vegetation seeds, and the vegetation substrate and vegetation seeds are distributed in each grid 321 of the geocells 32.

[0017] A retaining wall 4 is installed at the bottom of the slope to prevent the slope from sliding down.

[0018] Geocell 32 is a three-dimensional mesh structure formed by high-strength welding of reinforced HDPE sheets. It has good extensibility, is easy to transport, and can be stretched into a mesh during construction. Loose materials can be filled into it to form a structure with strong lateral confinement and high rigidity. The vegetation substrate and seeds are distributed within each grid 321 of the geocell 32, ensuring that they can only flow within their corresponding grids. This effectively reduces the possibility of substrate and seed loss, guarantees the formation of vegetation, and improves the slope's protective capacity.

[0019] Specifically, the anchor nails 33 are used to fix the plant fiber blanket 31 to the slope surface. The anchor nails 33 are embedded in the slope by pre-embedding and are spaced apart along the slope direction. To ensure the effectiveness of the plant fiber blanket 31, coconut fiber blanket 31 is preferably used.

[0020] The function of the connecting fastener 34 is to fix the geocell 32 to the surface of the planted fiber blanket 31, thereby securing the geocell 32. To facilitate use and improve the effectiveness of the connecting fastener 34, for example... Figure 2 As shown, the connecting fastener 34 is preferably a U-shaped connecting fastener.

[0021] To reduce the possibility of rainwater seeping into the retaining wall 4, an impermeable clay layer 41 is provided on the outer surface of the retaining wall 4. Furthermore, to improve the performance of the retaining wall 4, for example... Figure 1 As shown, the retaining wall 4 includes a back wall, which consists of, from top to bottom, an impermeable clay layer 41, a gravel layer 42, an impermeable geotextile layer 43, and a lime-soil layer 44. A drainage pipe is installed in the gravel layer 42, allowing water from the slope to flow into the gravel layer 42 and be discharged through the drainage pipe.

[0022] In summary, the first intercepting ditch 1, the second intercepting ditch 2, the geocell vegetation blanket component 3, and the retaining wall 4 together constitute the protection system for the expansive soil slope, thereby significantly improving the slope's protection capacity and ensuring its stability.

Claims

1. A protective structure for expansive soil slopes, characterized in that: It includes a first intercepting ditch (1) set at the top of the slope, a second intercepting ditch (2) set at the bottom of the slope, and a geocell vegetation mat assembly (3) set on the slope surface. The geocell vegetation mat assembly (3) includes a vegetation fiber mat (31) and geocells (32). The vegetation fiber mat (31) is set on the slope surface by anchor nails (33), and the geocells (32) are set on the surface of the vegetation fiber mat (31) by connecting fasteners (34). The vegetation fiber mat (31) is provided with vegetation substrate and vegetation seeds, and the vegetation substrate and vegetation seeds are distributed in each grid (321) of the geocell (32). A retaining wall (4) is installed at the bottom of the slope to prevent the slope from sliding down.

2. The protective structure for expansive soil slopes as described in claim 1, characterized in that: The connecting fastener (34) is a U-shaped connecting fastener.

3. The protective structure for expansive soil slopes as described in claim 1, characterized in that: The outer surface of the retaining wall (4) is provided with an impermeable clay layer (41).

4. The protective structure for expansive soil slopes as described in any one of claims 1 to 3, characterized in that: The retaining wall (4) includes a back wall, which consists of an impermeable clay layer (41), a gravel layer (42), an impermeable geotextile layer (43), and a lime soil layer (44) from top to bottom.

5. The protective structure for expansive soil slopes as described in claim 4, characterized in that: Drainage pipes are installed in the gravel layer (42).

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