Road slope prefabricated supporting structure for preventing landslide caused by rainfall

Abstract

The utility model discloses a road side slope prefabricated supporting structure for preventing landslide caused by rainfall. The road side slope prefabricated supporting structure comprises an anti-scouring structure (2), a local grouting anti-slide pile (3) and a drainage channel (4). A supporting frame (24) of the anti-scouring structure (2) is a cuboid container with the top not closed, a grid (241) is arranged at the bottom, matrix soil (21) and water repellent modified soil (22) are laid and filled in the anti-scouring structure (2) from bottom to top, root systems of vegetation (23) are located in the matrix soil (21), and the top of the vegetation (23) exceeds the water repellent modified soil (22). The upper ends of the local grouting anti-slide piles (3) are connected with the bottom of a supporting frame (24) of the anti-scouring structure (2), and the other ends of the local grouting anti-slide piles (3) vertically and downwards penetrate into a side slope body; and the drainage channel (4) is obliquely arranged along the slope surface from top to bottom and is connected with the anti-scouring structure (2) through the open tenon structure (5). The supporting structure can be beautified, direct impact of rainfall on the soil body can be avoided, the environment is beautified, and meanwhile the stability of the slope body is improved.

Description

Technical Field

[0001] The utility model belongs to the field of road slope support, and specifically relates to a prefabricated support structure for road slopes to prevent landslides caused by rainfall. Background Technique

[0002] A road slope refers to a slope with a certain gradient made on both sides of the roadbed to ensure the stability of the roadbed. Under rainfall conditions, due to the loosening and loss of soil caused by rainwater scouring and the increase in weight caused by rainwater infiltration, slope landslides are extremely likely to occur. To prevent landslides caused by rainfall, a support structure is needed to reinforce the slope body.

[0003] Chinese Patent with application number 202323081641.8 discloses a prefabricated support structure for road slopes. Through the planting cylinder, green plants can be planted on the slope, and the roots of the green plants further fasten the slope soil to prevent the soil inside the framework from loosening and flowing away. At the same time, the brush can buffer the strong rainfall that drips. However, the problem is that the number of planting cylinders is limited, and there is still a large area directly affected by rainwater. In addition, this structure only buffers the impact of rainfall on the soil mass and cannot drain water in time. Rainwater will still continuously infiltrate, increasing the weight, increasing the vertical force, and causing the formation of a potential slip surface of the slope body.

[0004] In view of this, to solve practical problems and aiming at the deficiencies of the existing structure, a prefabricated support structure for road slopes to prevent landslides caused by rainfall is proposed. Summary of the Invention

[0005] In order to overcome the deficiencies in the existing structure, the purpose of the utility model is to provide a prefabricated support structure for road slopes to prevent landslides caused by rainfall.

[0006] To achieve the above object of the utility model, the following technical solutions are adopted for a prefabricated support structure for road slopes to prevent landslides caused by rainfall in the utility model:

[0007] A prefabricated support structure for road slopes to prevent landslides caused by rainfall in the utility model includes an anti-scouring structure, a local grouting anti-slide pile, and a drainage channel; the support frame of the anti-scouring structure is a cuboid container without a closed top and a grid grille at the bottom. Inside the anti-scouring structure, matrix soil and water-repellent agent-modified soil are filled from bottom to top. The roots of the vegetation are located in the matrix soil, and the top of the vegetation exceeds the water-repellent agent-modified soil; the upper end of the local grouting anti-slide pile is connected to the bottom of the support frame of the anti-scouring structure, and the other end vertically penetrates deep into the slope body; the drainage channel is arranged obliquely along the slope surface from top to bottom and is connected to the anti-scouring structure through an open mortise structure. Generally, a flood interception ditch is also provided at the gentle upper part of the road slope, and the water outlet of the flood interception ditch is connected to the upper water inlet of the drainage channel.

[0008] Preferably, the open mortise and tenon structure consists of two parts, namely the upper open mortise and tenon structure and the lower open mortise and tenon structure; among them, the upper open mortise and tenon structure is the outer wall of the drainage channel, and the lower open mortise and tenon structure is the outer wall of the anti-scouring structure. The mortise and tenon parts of the upper open mortise and tenon structure and the lower open mortise and tenon structure can fit together and be clamped and fixed with each other.

[0009] Preferably, the lower part of the local grouting anti-slide pile passes through the potential slip surface of the slope body; the local grouting anti-slide pile is composed of a rigid pile and a granular pile in combination. The rigid pile is equal in length to the local grouting anti-slide pile, and the granular pile is located in the lower grouting section of the rigid pile and surrounds the lower part of the rigid pile. The lower part of the granular pile also passes through the potential slip surface of the slope body. After grouting, a granular pile is formed, enhancing the interface friction and making it difficult for a rupture surface to form. Generally, the volume of the granular pile located below the potential slip surface of the slope body accounts for 40%-70% of the overall volume of the granular pile.

[0010] Preferably, the local grouting anti-slide piles are arranged in a plum blossom shape on the slope surface to facilitate the redistribution of soil stress, form an arching effect of soil, and resist the sliding force.

[0011] Preferably, multiple sealing rubber strips are arranged on the open mortise and tenon structure to ensure that the water in the drainage channel does not leak into the lower slope body.

[0012] Preferably, the surface of the base soil is filled horizontally, and the surface of the water-repellent agent-modified soil is filled into an arc-shaped arch top, which is conducive to the rapid concentration of rainwater into the drainage channel.

[0013] After the prefabricated support structure for road slopes to prevent rainfall-induced landslides of the present utility model adopts the above technical solutions, the beneficial effects are as follows:

[0014] (1) The vegetation plants can not only beautify the support structure but also avoid the direct impact of rainfall on the soil body.

[0015] (2) The water-repellent agent-modified soil is filled into an arc-shaped arch top, which is conducive to the rapid sliding of rainwater to the drainage channels on both sides, avoiding the slope body sliding failure caused by the increase in soil weight and the decrease in shear strength due to rainwater infiltration in a short period of time.

[0016] (3) Under the connection of the anti-scouring structure at the top of the local grouting anti-slide pile, a structure similar to a multi-level anti-slide pile is formed. At the same time, due to the redistribution of soil stress behind the pile, the shear strength of the soil body plays a role, generating an arching effect of soil, and the anti-sliding force of the soil body is significantly increased.

[0017] (4) In addition, the grouting section of the local grouting anti-slide pile is located at the potential slip surface of the slope body. The local grouting improves the shear strength of the potential slip surface of the slope body, making it difficult for a rupture surface to form and improving the stability of the slope body. Description of the Drawings

[0018] Figure 1 This is the overall structural schematic diagram of a prefabricated support structure for a road slope to prevent landslides caused by rainfall in the present utility model;

[0019] Figure 2 This is the sectional view of the present utility model;

[0020] Figure 3 This is the schematic diagram of the bottom grid 241 of the anti-erosion structure adopted in the present utility model;

[0021] Figure 4 This is the schematic diagram of the open mortise structure adopted in the present utility model.

[0022] The reference numerals are: 1 - potential slip surface of the slope body; 2 - anti-erosion structure; 21 - matrix soil; 22 - water-repellent agent-modified soil; 23 - vegetation; 24 - support frame; 3 - local grouting anti-slide pile; 31 - rigid pile; 32 - granular pile; 241 - grid; 4 - drainage channel; 5 - open mortise structure; 51 - upper open mortise and tenon structure; 52 - lower open mortise and tenon structure; 53 - sealing strip. Specific embodiments

[0023] In order to further describe the present utility model, the following describes in more detail a prefabricated support structure for a road slope to prevent landslides caused by rainfall in the present utility model with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] From Figure 1 the overall structural schematic diagram of a prefabricated support structure for a road slope to prevent landslides caused by rainfall in the present utility model shown in Figure 2 、 Figure 3 、 Figure 4It can be seen that a prefabricated support structure for a road slope to prevent landslides caused by rainfall according to the present utility model includes an erosion-resistant structure 2, a partial grouting anti-slide pile 3, and a drainage channel 4. The support frame 24 of the erosion-resistant structure 2 is a cuboid container without a closed top, and the bottom is a grid grating 241, which is convenient for the root systems of vegetation to extend and take root in the slope soil mass; the inside of the erosion-resistant structure 2 is filled with matrix soil 21 and water-repellent agent-modified soil 22 from bottom to top, the root systems of the vegetation 23 are located in the matrix soil 21, and the top of the vegetation 23 extends beyond the water-repellent agent-modified soil 22; the surface of the matrix soil 21 is filled horizontally, and the surface of the water-repellent agent-modified soil 22 is filled into an arc-shaped vault. The partial grouting anti-slide piles 3 are arranged in a plum blossom shape on the slope surface, the upper ends of the partial grouting anti-slide piles 3 are connected to the bottom of the support frame 24 of the erosion-resistant structure 2, and the lower parts of the partial grouting anti-slide piles 3 pass through the potential slip surface 1 of the slope body. The drainage channel 4 is arranged obliquely along the slope surface from top to bottom and is connected to the erosion-resistant structure 2 through an open mortise structure 5. The open mortise structure 5 consists of two parts, namely an upper open mortise and tenon structure 51 and a lower open mortise and tenon structure 52. Among them, the upper open mortise and tenon structure 51 is the outer wall of the drainage channel 4, and the lower open mortise and tenon structure 52 is the outer wall of the erosion-resistant structure 2. The mortise and tenon parts of the upper open mortise and tenon structure 51 and the lower open mortise and tenon structure 52 can be mutually fitted and clamped and fixed, and multiple sealing rubber strips 53 are arranged on the open mortise structure 5.

[0025] It can also be seen from the overall structural schematic diagram of a prefabricated support structure for a road slope to prevent landslides caused by rainfall according to the present utility model shown in Figure 1 that the partial grouting anti-slide pile 3 is composed of a rigid pile 31 and a granular pile 32. The rigid pile 31 is of the same length as the partial grouting anti-slide pile 3. The granular pile 32 is located in the lower grouting section of the rigid pile 31 and surrounds the lower part of the rigid pile 31. The lower part of the granular pile 32 also passes through the potential slip surface 1 of the slope body. The granular pile 32 is formed when the cement mortar is squeezed into the soil on the pile side during grouting. Its stiffness and strength are both lower than those of the rigid pile 31 but greater than those of the soil mass. Both the granular pile 32 and the corresponding rigid pile 31 pass through the potential slip surface 1 of the slope body, enhancing the shear strength of the potential slip surface 1 of the slope body and making it difficult for the sliding rupture surface to form, thereby enhancing the stability of the slope body.

[0026] In the practical application of a prefabricated support structure for road slopes that prevents landslides caused by rainfall in the present utility model, the matrix soil 21 is selected as modified dredged soil. For every 1 kg of dredged soil, 6 g of superabsorbent polymer resin, 0.5 g of polyacrylamide, and 35 g of straw are added. The matrix soil 21 under this ratio can greatly improve the germination rate and survival rate of the vegetation 23. The water repellent is selected as octadecyl primary amine, and the dosage is preferably 1%. The water repellent modified soil 22 greatly extends the time for rainwater to infiltrate into the soil body. When rainwater falls, it forms plump water droplets like a lotus leaf on the surface of the water repellent modified soil 22. The paving surface of the matrix soil 21 is an arc-shaped vault, which is convenient for rainwater to slide down quickly and is concentrated and discharged after flowing into the drainage channel 4. After the vegetation 23 grows vigorously in the matrix soil 21, the water repellent modified soil 22 is paved, and it is ensured that the vegetation 23 is higher than the water repellent modified soil 22. The vegetation 23 is preferably tall fescue with strong growth ability, developed roots, high temperature resistance, and strong stress resistance. Under rainfall conditions, tall fescue can reduce the impact load of rainwater on the soil body, and the developed roots can produce a reinforcing effect in the slope body, improving the shear strength of the soil body.

[0027] From Figure 4 As can be seen from the schematic diagram of the open mortise structure adopted by the present utility model shown in the figure, the connection between the anti-scouring structure 2 and the drainage channel 4 is through the open mortise structure 5. Among them, the anti-scouring structure 2 is convex downward, and the drainage channel 4 is convex upward. Multiple sealing rubber strips 51 are arranged on the open mortise structure 5 to prevent the reduction of structural stability caused by rainwater infiltration.

[0028] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A prefabricated road slope support structure for preventing landslides caused by rainfall, characterized in that: It comprises an anti-scour structure (2), a local grouting anti-slide pile (3) and a drainage channel (4); the supporting frame (24) of the anti-scour structure (2) is a rectangular container with an open top and a mesh grid (241) at the bottom; the inside of the anti-scour structure (2) is filled with matrix soil (21) and water repellent modified soil (22) from bottom to top; the root system of the vegetation (23) is located in the matrix soil (21), and the top of the vegetation (23) exceeds the water repellent modified soil (22); the upper end of the local grouting anti-slide pile (3) is connected to the bottom of the supporting frame (24) of the anti-scour structure (2), and the other end is vertically downward and penetrates into the slope body; the drainage channel (4) is arranged obliquely along the slope surface from top to bottom, and is connected to the anti-scour structure (2) through an open mortise and tenon structure (5).

2. A prefabricated road slope support structure for preventing landslides caused by rainfall as claimed in claim 1, characterized in that: The open exposed tenon structure (5) is composed of two parts, namely an upper open tenon structure (51) and a lower open tenon structure (52); wherein the upper open tenon structure (51) is the outer wall of the drainage channel (4), and the lower open tenon structure (52) is the outer wall of the anti-scour structure (2); the tenon parts of the upper open tenon structure (51) and the lower open tenon structure (52) can fit each other and be fixed by clamping.

3. A prefabricated road slope support structure for preventing landslides caused by rainfall as claimed in claim 1, characterized in that: The lower part of the local grouting anti-sliding pile (3) passes through the potential sliding surface (1) of the slope body; the local grouting anti-sliding pile (3) is composed of a rigid pile (31) and a bulk pile (32), the rigid pile (31) is as long as the local grouting anti-sliding pile (3), the bulk pile (32) is located in the lower grouting section of the rigid pile (31) and surrounds the lower part of the rigid pile (31), and the lower part of the bulk pile (32) also passes through the potential sliding surface (1) of the slope body.

4. A prefabricated road slope support structure for preventing landslides caused by rainfall as claimed in claim 1, 2 or 3, characterized in that: The local grouting anti-slide piles (3) are arranged in a plum blossom shape on the slope surface.

5. A prefabricated road slope support structure for preventing landslides caused by rainfall as claimed in claim 4, characterized in that: A plurality of sealing strips (53) are arranged on the open tenon structure (5).

6. A prefabricated road slope support structure for preventing landslides caused by rainfall as claimed in claim 5, characterized in that: The surface of the matrix soil (21) is filled horizontally, and the surface of the water repellent modified soil (22) is filled in the form of an arc-shaped vault.

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