A foundation pit slope support structure

Abstract

This invention belongs to the field of slope protection technology, specifically a foundation pit slope protection structure, including a slope and a retaining wall at the bottom of the slope, comprising horizontal plates and vertical rods. The horizontal plates and vertical rods are combined to form a grid structure. The cross-section of the horizontal plates is rectangular, and the lower end of the horizontal plates is inserted into the slope. The vertical rods are located on the surface of the slope. The horizontal plates are parallel to the bottom edge of the slope, and the vertical rods are perpendicular to the bottom edge of the slope. This invention has a simple structure, which can ensure the firmness and stability of the support structure and the slope, improve the effect of slope protection, and prevent slope landslides and soil erosion.

Description

Technical Field

[0001] This invention belongs to the field of slope protection technology, specifically a foundation pit slope protection structure. Background Technology

[0002] Slope protection refers to the measures taken to support, reinforce, and protect slopes to ensure their safety and the safety of their environment. Currently, foundation pit construction is common in building projects. In areas with soft soil, poor stability, and abundant groundwater, such as the silty soil conditions in northern my country, the stability of foundation pit slopes is relatively poor. Even with relatively shallow pits and gentle slopes, the slope surface is prone to collapse and slippage under the influence of rainwater infiltration or vibrations generated during construction. This causes excavated soil to fall to the bottom of the pit, affecting the safety of the construction project.

[0003] Currently, to prevent slope collapse and landslides, multiple anchor rods and anchor bundles are generally installed within the slope, and cement mortar is filled between the anchor rods, anchor bundles and anchor holes to ensure that the anchor rods and anchor bundles are tightly connected with the surrounding discrete rock mass or soil. At the same time, reinforced concrete is sprayed on the slope surface to achieve slope stability. However, this method has a relatively slow construction speed, requires a large construction site and has high costs.

[0004] Meanwhile, traditional anchor bolt support devices have a relatively simple structure and low support capacity for foundation pit slopes. During the support process, the slope is prone to soil erosion, which can lead to hollowing, loosening, and collapse of the slope surface. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, ensure the firmness and stability of the support structure and the slope, improve the effect of slope support, and avoid landslides and soil erosion, this invention proposes a foundation pit slope support structure.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a foundation pit slope support structure, including a slope and a retaining wall set at the bottom of the slope, including a horizontal plate and a vertical bar. The horizontal plate and the vertical bar are combined to form a grid structure. The cross-section of the horizontal plate is rectangular. The lower end of the horizontal plate is inserted into the slope. The vertical bar is located on the surface of the slope.

[0007] The horizontal plate is parallel to the bottom edge of the slope, and the vertical rod is perpendicular to the bottom edge of the slope.

[0008] The horizontal plate has a cavity inside, and the side of the horizontal plate has a grid hole that connects to the cavity.

[0009] The slope surface is planted with slope protection turf, and the cavity is filled with reinforcing grass seeds, which are fast-growing grass seeds with well-developed root systems. A budding groove is opened at the upper end of the cavity, and a mesh layer is installed on the budding groove.

[0010] Preferably, anti-recoil plates are installed on the side of the horizontal plate, and the anti-recoil plates are evenly distributed along the length of the horizontal plate, with a gap between the upper end of the anti-recoil plate and the side of the horizontal plate.

[0011] Preferably, the anti-recoil plate is made of an elastic material and adheres to the side of the cross plate after being compressed.

[0012] Preferably, absorbent paper is attached to the inner wall of the cavity, and the absorbent paper seals the mesh holes.

[0013] Preferably, the absorbent paper is made from recycled waste paper, and the absorbent paper contains an absorbent agent, a nutrient agent, and a decomposing agent. The absorbent agent is a superabsorbent polymer, the nutrient agent is a fertilizer adapted to strengthen the growth of grass seeds, and the decomposing agent is a common cellulose-decomposing bacteria.

[0014] Preferably, a fixing nail is installed on the vertical rod, the lower end of the fixing nail is inserted into the slope, and the fixing nail is located on both sides of the horizontal plate;

[0015] The length of the fixing nail is greater than the height of the horizontal plate. The fixing nail is hollow inside and has through holes on its surface. Cement grout is injected into the fixing nail.

[0016] Preferably, a pushing block is slidably installed inside the fixing nail, and a branch tube is installed inside the fixing nail. The lower end of the branch tube is inserted into the through hole, and the upper end of the branch tube contacts the lower surface of the pushing block. The branch tube is elastic, and micropores are formed on the surface of the branch tube.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The foundation pit slope support structure of the present invention, by setting up vertical rods, horizontal plates, grid holes and reinforcing grass seeds, makes the horizontal plates and vertical rods form a grid structure on the slope, and the horizontal plates are inserted into the slope to support the slope and prevent the slope surface from sliding.

[0019] 2. The foundation pit slope support structure of the present invention uses fixing nails and branch pipes to fix the vertical rods and restrict the position of the horizontal plates, preventing displacement and improving the support effect of the horizontal plates. At the same time, the fixing nails and branch pipes make the interaction range between the fixing nails and the soil on the slope relatively large after grouting, improving the connection between the slope and the vertical rods, horizontal plates and fixing nails, resulting in good slope stability and preventing landslides. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the support structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the horizontal plate in this invention;

[0023] Figure 3 This is a schematic diagram of the structure of the present invention when the fixing nail is not in use;

[0024] Figure 4 This is a schematic diagram of the structure after the fixing nail is used in this invention;

[0025] Figure 5 yes Figure 2 A partial enlarged view of the middle part;

[0026] Figure 6 yes Figure 4 Enlarged view of a section at point B in the middle;

[0027] In the diagram: 1. Slope, 11. Retaining wall, 2. Horizontal plate, 21. Grid hole, 22. Absorbent paper, 23. Reinforcing grass seed, 24. Mesh layer, 3. Vertical rod, 4. Fixing nail, 41. Pushing block, 42. Branch pipe, 5. Anti-retrograde plate. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0029] like Figures 1 to 6 As shown, the present invention provides a foundation pit slope support structure, including a slope 1 and a retaining wall 11 set at the bottom of the slope 1. The slope 1 is planted with slope protection grass, including a horizontal plate 2 and a vertical rod 3. The horizontal plate 2 and the vertical rod 3 are combined to form a grid structure. The cross-section of the horizontal plate 2 is rectangular. The lower end of the horizontal plate 2 is inserted into the slope 1, and the vertical rod 3 is located on the surface of the slope 1.

[0030] The horizontal plate 2 is parallel to the bottom edge of the slope 1, and the vertical rod 3 is perpendicular to the bottom edge of the slope 1; the horizontal plate 2 has a cavity inside, and the side of the horizontal plate 2 has a grid hole 21 that connects to the cavity.

[0031] The cavity is filled with reinforced grass seeds 23, which are grass seeds with fast growth and well-developed root systems. A budding groove is opened at the upper end of the cavity, and a mesh layer 24 is installed on the budding groove.

[0032] Workers place horizontal plates 2 at fixed intervals on slope 1. Then, they press or tap the horizontal plates 2 to insert them into slope 1. After the horizontal plates 2 are inserted into slope 1, workers pass vertical rods 3 through the corresponding through holes on the horizontal plates 2. This creates a grid-like structure on slope 1, dividing the surface of slope 1 into multiple relatively independent areas. This supports slope 1 and prevents collapse or landslides that could affect its stability.

[0033] Meanwhile, since the horizontal plate 2 is parallel to the bottom edge of the slope 1, and the horizontal plate 2 is inserted into the slope 1 under the pressure or knocking of the workers, after the horizontal plate 2 and the vertical bar 3 are combined to form a grid structure, the horizontal plate 2 will hinder the sliding soil on the slope 1, making the surface of the slope 1 a whole to a certain extent, thereby avoiding or reducing the possibility of the soil on the slope 1 sliding down the slope 1, improving the stability of the slope 1 structure and the support effect of the slope 1, and avoiding collapse, landslides and other situations. At the same time, by planting common slope protection grass in the grid shape formed by the horizontal plate 2 and the vertical bar 3, the surface of the slope 1 can be further integrated, reducing the possibility of landslides on the surface of the slope 1 and improving the support effect. At the same time, by inserting the horizontal plate 2 into the slope 1 and the vertical bar 3 connecting the horizontal plate 2, the relatively weak soil on the surface of the slope 1 is connected to each other, preventing the soil layer on the surface of the slope 1 from collapsing or falling, and avoiding the soil falling to the bottom of the foundation pit from posing a safety hazard to the construction workers and affecting the normal construction of the building project.

[0034] In another embodiment, the support structure can be used not only for supporting the slopes of building foundation pits, but also for supporting highway slopes, riverbanks, etc. During support installation, after the workers have installed the horizontal plate 2 and vertical rod 3, the horizontal plate 2 is inserted into the slope 1, and all the mesh holes 21 on the horizontal plate 2 are buried by the soil on the slope 1. Then, the workers spray and water the slope 1, increasing the moisture content of the surface soil and preventing loose soil and dust from flying or sliding, which would affect the support effect on the slope 1. Simultaneously, the moisture in the surface soil of the slope 1 will seep through the mesh holes 21 into the cavities inside the horizontal plate 2. During watering, water seeps from the mesh layer 24 into the cavity, causing the reinforcing grass seeds 23 filling the cavity to gradually germinate and take root. After germination, the roots of the reinforcing grass seeds 23 extend from the mesh holes 21 and gradually take root in the soil of the slope 1. The sprouts of the reinforcing grass seeds 23 gradually emerge from the mesh layer 24 on the horizontal board 2. In this process, the relationship between the roots of the reinforcing grass seeds 23 and the slope 1 effectively improves the connection between the horizontal board 2 and the slope 1, making the slope 1 more stable. Simultaneously, the roots growing from the reinforcing grass seeds 23 within the horizontal board 2 also contribute to the soil stability of the slope 1. Loose soil and dust are interconnected and fixed, improving the stability of slope 1 and preventing landslides. Simultaneously, as the shoots of the reinforcing grass seeds 23 gradually emerge from the mesh layer 24, the surface of the horizontal slab 2 is covered with grass, reducing the difference between the horizontal slab 2 and slope 1, thus improving the aesthetics of the supported slope 1. Furthermore, the reinforcing grass seeds 23 planted in the cavities are selected from fast-growing varieties with well-developed root systems, allowing the reinforcing grass seeds 23 to quickly strengthen the connection between the horizontal slab 2 and slope 1 after slope 1 is supported, improving the support effect of slope 1 and preventing the fall of loose soil, gravel, etc., from the slope 1 surface. Simultaneously, the roots of the reinforcing grass seeds 23 growing from the grid holes 21 on the horizontal plate 2 will reinforce the soil layer around the horizontal plate 2, improve the soil layer's ability to withstand external forces, prevent weak soil from affecting the stability of the slope 1, and affect the firmness of the connection between the support structure and the slope 1, thus preventing poor support effect on the slope 1. At the same time, the reinforcing grass seeds 23 strengthen the soil layer around the horizontal plate 2, reduce the impact of rainwater on the soil layer of the slope 1, prevent soil erosion and collapse on the slope 1, and prevent the impact on construction in the building foundation pit and the threat of falling soil to construction workers.

[0035] In one embodiment of the present invention, an anti-recoil plate 5 is installed on the side of the horizontal plate 2. The anti-recoil plate 5 is evenly distributed along the length direction of the horizontal plate 2, and there is a gap between the upper end of the anti-recoil plate 5 and the side of the horizontal plate 2.

[0036] By installing anti-retreat plates 5 on the side of the horizontal plate 2, after the horizontal plate 2 is pressed or tapped by workers and inserted into the slope 1, the anti-retreat plates 5 installed on the horizontal plate 2 will also be inserted into the soil, improving the structural effect and bonding stability between the horizontal plate 2 and the slope 1, and preventing the horizontal plate 2 and vertical rods 3 from loosening during the subsequent support of the slope 1, which would affect the stability of the slope 1. At the same time, since there is a gap between the upper end of the anti-retreat plate 5 and the side of the horizontal plate 2, after the horizontal plate 2 is inserted into the slope 1, the upper end of the anti-retreat plate 5 will be inserted into the soil, preventing or preventing the horizontal plate 2 from retreating outwards from the slope 1, thereby ensuring the stability of the support structure composed of the horizontal plate 2 and vertical rods 3 on the surface of the slope 1, making the support effect of the slope 1 stable and durable, and preventing landslides.

[0037] In one embodiment of the present invention, the anti-recoil plate 5 is made of an elastic material, and the anti-recoil plate 5 is pressed and adhered to the side of the horizontal plate 2.

[0038] Because the anti-receding plate 5 is made of elastic material, such as thin steel sheet, when the horizontal plate 2 is inserted into the slope 1, the anti-receding plate 5 will be squeezed by the soil, making the anti-receding plate 5 stick tightly to the surface of the horizontal plate 2. This reduces the resistance between the anti-receding plate 5 and the soil, and prevents the anti-receding plate 5 from always being in a tilted state, which would hinder or affect the insertion of the horizontal plate 2 into the slope 1. This makes it easier for workers to install the horizontal plate 2 in the support structure, reducing the workload and labor intensity of the workers. At the same time, after the horizontal plate 2 is inserted into the slope 1, the anti-receding plate 5 expands and the soil enters between the upper end of the anti-receding plate 5 and the horizontal plate 2, so that the anti-receding plate 5 has a locking effect on the horizontal plate 2, preventing the horizontal plate 2 from being pulled out of the slope 1 again. This makes the connection between the horizontal plate 2 and the slope 1 more solid, improves the stability of the slope 1, and reduces the possibility of landslides.

[0039] In one embodiment of the present invention, absorbent paper 22 is attached to the inner wall of the cavity, and the absorbent paper 22 closes the mesh holes 21.

[0040] By installing absorbent paper 22 on the inner wall of the cavity, the grid holes 21 on the horizontal plate 2 are sealed during the insertion of the horizontal plate 2 into the slope 1. This effectively prevents the loss of the reinforcing grass seeds 23 in the cavity and the entry of soil from the slope 1 into the cavity through the grid holes 21, which would block the grid holes 21, affecting the entry of water and the root extension of the reinforcing grass seeds 23. At the same time, it also prevents soil from entering the cavity through the grid holes 21, squeezing the reinforcing grass seeds 23 and causing damage. In addition, by installing absorbent paper 22 on the inner wall of the cavity, after the support structure on the slope 1 is installed, water is absorbed and stored in the absorbent paper 22 during and after watering, moistening and soaking the reinforcing grass seeds 23. This is conducive to the rooting and germination of the reinforcing grass seeds 23, improves the connection effect of the reinforcing grass seeds 23 to the horizontal plate 2 and the slope 1, and thus enhances the support effect of the slope 1.

[0041] In one embodiment of the present invention, the absorbent paper 22 is made of recycled waste paper, and the absorbent paper 22 contains an absorbent agent, a nutrient agent and a decomposing agent. The absorbent agent is a superabsorbent polymer, the nutrient agent is a fertilizer adapted to the growth of the reinforced grass seed 23, and the decomposing agent is a common cellulose-decomposing bacteria.

[0042] By using recycled waste paper to make absorbent paper 22, the cost of use can be reduced, and the waste paper can be reused. At the same time, by adding a water-absorbing agent made of polymer absorbent resin to absorbent paper 22, the moisture content stored in absorbent paper 22 can be increased, which is beneficial to the germination rate of grass seeds 23 and thus improves the effect of grass seeds 23. Meanwhile, the fertilizer added to absorbent paper 22 can promote the growth of grass seeds 23 and increase the root development of grass seeds 23, so that the connection between the cross plate 2 and the slope 1 is stronger under the action of the root system of grass seeds 23, improving the stability of slope 1 and preventing landslides. In addition, the cellulose decomposing bacteria added to absorbent paper 22 can accelerate the decomposition speed of absorbent paper 22, making it easier for the roots of grass seeds 23 to penetrate the absorbent paper 22 and emerge from the grid holes 21 into the slope 1 after rooting, thus improving the connection between cross plate 2 and slope 1.

[0043] In one embodiment of the present invention, a fixing nail 4 is installed on the vertical rod 3, the lower end of the fixing nail 4 is inserted into the slope 1, and the fixing nail 4 is located on both sides of the horizontal plate 2.

[0044] The length of the fixing nail 4 is greater than the height of the horizontal plate 2. The fixing nail 4 is hollow inside and has through holes on its surface. Cement grout is injected into the fixing nail 4.

[0045] After the workers have installed the horizontal plate 2 and the vertical rod 3, they insert fixing nails 4 from the vertical rod 3 into the slope 1. These fixing nails increase the strength of the connection between the vertical rod 3 and the slope 1, thereby improving the stability of the slope 1 and preventing landslides. Simultaneously, because the fixing nails 4 are located on both sides of the horizontal plate 2, the movement of the horizontal plate 2 along the vertical rod 3 is hindered, ensuring the stability of the grid structure formed by the horizontal plate 2 and the vertical rod 3. This further improves the support effect on the slope 1, preventing collapses and landslides. After inserting the fixing nails 4 into the slope 1, the workers inject grout into the fixing nails 4, and the injected cement grout spreads to the area around the fixing nails 4 through the through holes on the surface of the fixing nails 4, improving the bonding strength between the fixing nails 4 and the slope 1. The fixed nail 4, horizontal plate 2, vertical rod 3, and slope 1 are strengthened to make the connection more stable, thereby improving the stability of slope 1 and preventing landslides. At the same time, since the length of the fixed nail 4 is greater than the height of the horizontal plate 2, the fixed nail 4 is inserted into the slope 1 to a greater depth than the horizontal plate 2. This allows the fixed nail 4 to be inserted into the relatively stable and hard soil structure of slope 1 as much as possible, thus making the connection between the support structure and slope 1 more secure. When the horizontal plate 2 is used to impede and support the soft soil layer on slope 1, the fixed nail 4 can provide greater support to the horizontal plate 2, thereby improving the support effect of the horizontal plate 2 and preventing the soil on the surface of slope 1 from sliding to the bottom of the building foundation pit, which would affect the normal progress of construction.

[0046] In one embodiment of the present invention, a pushing block 41 is slidably installed inside the fixing nail 4, and a branch tube 42 is installed inside the fixing nail 4. The lower end of the branch tube 42 is inserted into the through hole, and the upper end of the branch tube 42 contacts the lower surface of the pushing block 41. The branch tube 42 is elastic, and micropores are formed on the surface of the branch tube 42.

[0047] After the fixing nail 4 is inserted into the slope 1, the workers use tools to push the push block 41 inside the fixing nail 4, causing the push block 41 to move towards the bottom of the fixing nail 4. This causes the push block 41 to move the branch pipe 42 installed inside the fixing nail 4 downward. Because the branch pipe 42 is elastic and its lower end is inserted into the through hole on the surface of the fixing nail 4, the branch pipe 42 gradually extends and inserts from the fixing nail 4 into the surrounding area. At the same time, because the push block 41 is evenly provided with mesh holes, the cement grout will smoothly pass through the push block 41 during grouting and then into the lower part of the fixing nail 4 and the branch pipe 42. Meanwhile, because the branch pipe 42 has micropores, the grout will diffuse from the micropores of the branch pipe 42 into the soil around the branch pipe 42. Thus, through the action of the branch pipe 42, the connection range between the fixing nail 4 and the surrounding soil of the slope 1 is expanded, improving the connection effect and firmness between the fixing nail 4 and the slope 1, thereby improving the stability of the slope 1 and preventing landslides.

[0048] The specific workflow is as follows:

[0049] Workers place horizontal plates 2 at fixed intervals on slope 1. Then, workers press or tap the horizontal plates 2 to insert them into slope 1. After the horizontal plates 2 are inserted into slope 1, workers pass vertical rods 3 through the corresponding through holes on the horizontal plates 2, so that the numerous horizontal plates 2 and vertical rods 3 form a grid-like structure on slope 1.

[0050] At the same time, since the horizontal plate 2 is parallel to the bottom edge of the slope 1, the horizontal plate 2 will hinder the sliding of the soil on the slope 1, thus avoiding or reducing the possibility of the soil on the slope 1 sliding down the slope 1.

[0051] By installing anti-retrograde plate 5 on the side of the horizontal plate 2, after the horizontal plate 2 is pressed or knocked by the staff and inserted into the slope 1, the anti-retrograde plate 5 installed on the horizontal plate 2 will also be inserted into the soil, improving the structural effect and bonding stability between the horizontal plate 2 and the slope 1.

[0052] Because the anti-retraction plate 5 is made of elastic material, such as thin steel sheet, when the horizontal plate 2 is inserted into the slope 1, the anti-retraction plate 5 will be squeezed by the soil, so that the anti-retraction plate 5 is tightly attached to the surface of the horizontal plate 2, thereby reducing the resistance between the anti-retraction plate 5 and the soil. At the same time, after the horizontal plate 2 is inserted into the slope 1, the anti-retraction plate 5 expands and the soil enters between the upper end of the anti-retraction plate 5 and the horizontal plate 2, thereby making the anti-retraction plate 5 snap and lock the horizontal plate 2, preventing the horizontal plate 2 from being pulled out of the slope 1 again.

[0053] After the workers have installed the horizontal plate 2 and the vertical rod 3, they insert the fixing nail 4 from the vertical rod 3 into the slope 1. The fixing nail 4 is used to increase the firmness of the connection between the vertical rod 3 and the slope 1. At the same time, since the fixing nail 4 is located on both sides of the horizontal plate 2, the movement of the horizontal plate 2 along the vertical rod 3 is hindered. After the fixing nail 4 is inserted into the slope 1, the workers inject grout into the fixing nail 4 and spread the injected cement grout to the area around the fixing nail 4 through the through hole on the surface of the fixing nail 4, thereby improving the bonding strength between the fixing nail 4 and the slope 1.

[0054] After the fixing nail 4 is inserted into the slope 1, the workers use tools to push the push block 41 inside the fixing nail 4, so that the push block 41 moves towards the bottom of the fixing nail 4, and then the push block 41 drives the branch pipe 42 installed inside the fixing nail 4 to move downward, so that the branch pipe 42 gradually extends and inserts from the fixing nail 4 into the surrounding area. Since the branch pipe 42 has micropores, the slurry will diffuse from the micropores of the branch pipe 42 into the soil around the branch pipe 42. Thus, through the action of the branch pipe 42, the connection range between the fixing nail 4 and the surrounding soil of the slope 1 is expanded, and the connection effect and firmness between the fixing nail 4 and the slope 1 are improved.

[0055] As another embodiment, in addition to supporting the slope of foundation pits, it can also protect highway slopes and riverbank slopes. During use, after the workers install the horizontal plate 2 and vertical rod 3, the horizontal plate 2 is inserted into the slope 1, and all the grid holes 21 on the horizontal plate 2 are buried by the soil on the slope 1. Then, the workers spray and water the slope 1, increasing the moisture content of the surface soil. Simultaneously, the moisture in the surface soil of the slope 1 seeps through the grid holes 21 into the cavities inside the horizontal plate 2. During the watering process, water seeps from the mesh layer 24 into the cavity, causing the reinforcing grass seeds 23 filled in the cavity to gradually germinate and take root. After that, the roots of the reinforcing grass seeds 23 will extend from the mesh holes 21 and gradually take root in the soil on the slope 1. The buds of the reinforcing grass seeds 23 will gradually emerge from the mesh layer 24 on the horizontal board 2. In this process, the connection between the roots of the reinforcing grass seeds 23 and the slope 1 is improved through the relationship between the roots of the reinforcing grass seeds 23 and the slope 1.

[0056] By using absorbent paper 22 installed on the inner wall of the cavity, the grid holes 21 on the horizontal plate 2 are sealed during the process of inserting the horizontal plate 2 into the slope 1, so as to prevent the reinforcing grass seeds 23 in the cavity from being lost and the soil on the slope 1 from entering the cavity through the grid holes 21, which would cause the grid holes 21 to be blocked and the reinforcing grass seeds 23 to be squeezed. In addition, the absorbent paper 22 installed on the inner wall of the cavity absorbs and retains water, moistens and soaks the reinforcing grass seeds 23, which is conducive to the rooting and germination of the reinforcing grass seeds 23.

[0057] By using recycled waste paper to make absorbent paper 22, the cost of use can be reduced. At the same time, by adding a water-absorbing agent made of polymer absorbent resin to absorbent paper 22, the moisture content stored in absorbent paper 22 can be increased. Meanwhile, the fertilizer added to absorbent paper 22 can promote the growth of reinforced grass seed 23 and increase the root development of reinforced grass seed 23. In addition, the cellulose decomposing bacteria added to absorbent paper 22 can accelerate the decomposition speed of absorbent paper 22, making it easier for the roots of reinforced grass seed 23 to penetrate absorbent paper 22 and emerge from the grid holes 21 into slope 1 after rooting.

[0058] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foundation pit slope protection structure, characterized in that: It includes a horizontal plate (2) and a vertical rod (3), which are combined to form a grid structure. The horizontal plate (2) has a rectangular cross-section. The lower end of the horizontal plate (2) is inserted into the slope (1), and the vertical rod (3) is located on the surface of the slope (1). The horizontal plate (2) is parallel to the bottom edge of the slope (1), and the vertical rod (3) is perpendicular to the bottom edge of the slope (1). The horizontal plate (2) has a cavity inside, and the side of the horizontal plate (2) has a mesh hole (21) that connects to the cavity; The cavity is filled with reinforced grass seeds (23); An anti-recoil plate (5) is installed on the side of the horizontal plate (2), and there is a gap between the upper end of the anti-recoil plate (5) and the side of the horizontal plate (2). The anti-recoil plate (5) is made of elastic material and is pressed against the side of the horizontal plate (2). Absorbent paper (22) is attached to the inner wall of the cavity, and the absorbent paper (22) seals the mesh holes (21).

2. The foundation pit slope protection structure according to claim 1, characterized in that: The absorbent paper (22) is made from recycled waste paper and contains absorbent, nutrient and decomposing agent.

3. The foundation pit slope protection structure according to claim 1, characterized in that: A fixing nail (4) is installed on the vertical rod (3). The lower end of the fixing nail (4) is inserted into the slope (1). The fixing nail (4) is located on both sides of the horizontal plate (2). The length of the fixing nail (4) is greater than the height of the horizontal plate (2). The fixing nail (4) is hollow inside and has through holes on its surface. Cement grout is injected into the fixing nail (4).

4. The foundation pit slope protection structure according to claim 3, characterized in that: A pusher block (41) is slidably installed inside the fixing nail (4), and a branch tube (42) is installed inside the fixing nail (4). The lower end of the branch tube (42) is inserted into the through hole, and the upper end of the branch tube (42) contacts the lower surface of the pusher block (41). The branch tube (42) is elastic, and micropores are opened on the surface of the branch tube (42).

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