An expansive soil slope flexible ecological supporting structure and construction method

Abstract

The application discloses an expansive soil slope flexible ecological supporting structure and a construction method. The supporting structure comprises a composite cushion plate, an anchor rod, a water collecting and draining ditch and a water circulation system. The composite cushion plate of the supporting structure is composed of a sandwich structure of a drainage plate, a sponge layer and a polystyrene foam plate. The drainage plate is connected with the sponge layer through nails. The sponge layer is tightly connected with the polystyrene foam plate through polyethylene foaming material glue. A circular pipe channel for placing a flow guide pipe is reserved at the bottom of the sponge layer. The anchor rod is arranged in a set position in a regular hexagon. The water collecting and draining ditch is arranged at the top and bottom of the slope. The water collecting and draining ditch is connected with the water circulation system. The application controls the water content of the expansive soil in the slope within a certain range and allows a small amount of deformation of the structure, so that the deformation amount of the expansive soil slope is always within the standard allowable range, and the purposes of "controlling expansion by flexibility" and "green slope protection" are achieved.

Description

Technical Field

[0001] This invention relates to the field of geotechnical engineering, specifically to a flexible ecological support structure and construction method for expansive soil slopes. Background Technology

[0002] Expansive soil is a special type of cohesive soil rich in hydrophilic minerals. It easily absorbs water and expands, and shrinks when it loses water, exhibiting significant overconsolidation, fissures, and swelling / shrinkage properties, as well as repeated deformation. Repeated expansion and contraction of expansive soil not only loosens its structure and significantly reduces its strength, but also leads to the formation and development of fissures within the soil. The presence of these fissures increases the infiltration channels, causing deeper layers of the soil with fissures to be affected by moisture changes, resulting in a sharp decrease in strength. Therefore, controlling the moisture content of expansive soil slopes within a certain range can effectively prevent significant deformation and avoid the development of cracks, thus ensuring the stability of the expansive soil slope.

[0003] Traditional rigid supports, such as retaining walls and anti-slide piles, are inadequate for the slope protection effect due to their inability to adapt to the "three properties" of expansive soil and their mutual feedback effects. They are often not durable and may even fail completely within a short period. Flexible supports, compared to rigid supports, have better ductility, allowing expansive soil to deform and achieving "softening expansity," resulting in better treatment effects. However, existing flexible support technologies, such as geogrid wrapping technology and geotextile bag retaining walls, suffer from poor durability and unsatisfactory long-term support effects. Furthermore, existing flexible support technologies primarily focus on slope protection and reinforcement of the surface soil, failing to achieve integrated "surface-shallow-deep" slope protection.

[0004] Ecological slope protection technology is a method of slope support that integrates theories of plants, soil, and ecological mechanics. Its principle is to utilize the deep roots of plants to anchor the slope, while the shallow roots reinforce it. This ensures the stability of the shallow slope layer and leverages the ecosystem's restorative capacity to allow the damaged ecosystem to gradually recover or move towards a positive state. However, current ecological slope protection technologies for expansive soil slopes also have some drawbacks: the integration of geotextiles and vegetation is not ideal, soil retention capacity is insufficient, durability is poor, and it is difficult to meet the needs of long-term support. Summary of the Invention

[0005] In view of the above-mentioned technical problems existing in the prior art, the present invention proposes a flexible ecological support structure and construction method for expansive soil slopes, which can effectively reduce soil erosion, protect the ecological environment, and at the same time achieve water stability of the slope, ensuring the common stability of the slope from surface to shallow to deep.

[0006] One of the objectives of this invention is to provide a flexible ecological support structure for expansive soil slopes. This structure employs a flexible support method and uses composite pads with a certain elastic deformation capacity. When a certain amount of deformation occurs on the expansive soil slope, the deformation of the slope can be converted into the deformation of the composite pad by compressing the composite pad. The composite pad absorbs the deformation of the slope, effectively controlling the deformation of the expansive soil slope.

[0007] Another objective of this invention is to provide a construction method for a flexible ecological support structure for expansive soil slopes. The method employs a three-layer composite pad, in which a high-density sponge in the middle layer can absorb a large amount of water. When water penetrates the surface soil and enters the composite pad, the high-density sponge effectively absorbs the water into its interior. Simultaneously, when subjected to compression and deformation, the water can be discharged into a water storage tank through a diversion pipe, effectively preventing water from seeping into deeper soil layers, thereby mitigating the damage caused by the expansion of expansive soil when exposed to water.

[0008] Another objective of this invention is to use a water circulation system in the flexible ecological support structure for expansive soil slopes to maintain slope water stability. When the expansive soil slope experiences significant drought and shrinkage, water is supplied using a seepage pipe network and water pumps. This not only prevents the expansive soil from shrinking but also irrigates the slope vegetation, maintaining the stability of the slope ecosystem. The mesh structure of the seepage pipe network can also reinforce the surface soil.

[0009] To achieve the above objectives, the technical solution of the present invention is as follows: A flexible ecological support structure for expansive soil slopes, comprising composite pads, anchor bolts, intercepting / drainage ditches, and a water circulation system, wherein the specific structure and connection relationship of the constituent components are as follows:

[0010] The composite pad is a sandwich structure consisting of a drainage board, a sponge layer and a polystyrene foam board. The drainage board is connected to the sponge layer by nails, and the sponge layer is tightly connected to the polystyrene foam board by polyethylene foam adhesive. A circular tube channel for placing a drainage pipe is reserved at the bottom of the sponge layer.

[0011] The anchor bolts are arranged in a regular hexagonal pattern at the designated positions, and the anchor bolt holes coincide with the protective layer.

[0012] The intercepting / drainage ditch is designed with a rectangular or trapezoidal cross section according to the calculated drainage flow rate, and the depth is made according to the design depth. The intercepting / drainage ditch is connected to the drainage system.

[0013] The water circulation system includes a guide pipe, a water storage tank, a seepage pipe network, a water pump, a water flow channel converter, a water collection tank, a first connecting pipe, and a second connecting pipe. The guide pipe is a UPVC pipe with pre-drilled inlet holes on the side and top. The guide pipes are installed sequentially in the circular pipe channels pre-drilled at the bottom of the sponge layer for placing the guide pipes. The water storage tank is located outside the drainage ditch and is used to store the water collected in the guide pipes. The seepage pipe network is a mesh structure formed by multiple PVC steel wire pipes vertically intersecting, with a miniature water tank at the top. One end of the water flow channel converter is connected to the water pump and the first connecting pipe, and the other end is connected to the seepage pipe network through the second connecting pipe. The second connecting pipe is connected to the guide pipe through the water collection tank. One end of the water collection tank is connected to the guide pipe, and the other end is connected to the water storage tank through the second connecting pipe.

[0014] The composite pad is a 5cm thick polymer plastic drainage board, 30cm thick, and with a density of not less than 25kg / m³. 3 The high-density sponge and the polystyrene foam board with a thickness of not less than 10cm are used, and the inner diameter of the guide tube is 25mm and the thickness is 2mm.

[0015] The anchor bolts are arranged in a regular hexagonal pattern with a side length of 3m.

[0016] The first connecting pipe is a UPVC pipe with an outer diameter of 40mm and a wall thickness of 2.5mm.

[0017] The second connecting pipe is a UPVC pipe with an outer diameter of 75mm and a wall thickness of 5.6mm.

[0018] The water storage tank is a reinforced concrete cube with a side length of 100cm and a thickness of 5cm, and has five water outlets at the bottom.

[0019] The drainage pipes in the drainage network are PVC steel wire pipes with an inner diameter of 10mm, a wall thickness of 2.5mm, and an orifice diameter of 2mm, and a filter screen is added at the orifice.

[0020] The top of the seepage pipe network is provided with seepage holes, of which the seepage holes near the bottom of the slope have a diameter of 1 mm and the seepage holes near the top of the slope have a diameter of 2 mm. The seepage pipe network is fixed by stainless steel anchor plates.

[0021] The construction method for the flexible ecological support structure for expansive soil slopes includes the following steps:

[0022] (1) Trim the slope surface and excavate a portion of the expansive soil slope according to the design requirements to make the slope surface flat.

[0023] (2) Excavate the intercepting ditch, excavate the water storage tank, and lay pipelines: Excavate the intercepting ditch at the top of the slope according to the design requirements, excavate the water storage tank 1m away from the drainage ditch at the bottom of the slope and grout to form a reinforced concrete cube structure, and install the water pump and control line after the water storage tank has a certain strength. At the same time, complete the connection of the water pump, water flow channel converter and connecting pipe I inside the water storage tank. The water pump outlet is connected to the water pump connection port through a flexible joint, and the converter outlet is connected to the connecting pipe I by a flange connection. Then, the connecting channel II and the connecting channel I outside the water storage tank are extended to the foot of the slope using PVC pipes of the corresponding diameter.

[0024] (3) Measure and lay out, lay composite pads and backfill the expansive soil layer: mark the anchor bolt positions according to the design requirements, align the anchor bolt protective sleeve with the anchor bolt positions and lay the fixed composite pads close to the slope, and at the same time connect the diversion pipe with the water collection tank and do a waterproof sealing job. The diversion pipe is connected by bonding through the same diameter PVC pipe in the rectangular interface. Then the circular outlet is connected to the connecting pipe II through the same diameter PVC pipe. The connecting pipe I extends upward a certain distance using a bend. Finally, take soil from the local area to backfill the expansive soil layer and compact it to a certain extent.

[0025] (4) Backfill planting soil, lay infiltration pipe network, and backfill and compact the bottom of the slope: Backfill and compact 10cm thick planting soil on the surface of the expansive soil layer, lay and fix the infiltration pipe network according to the design and layout position and complete the connection with the first connecting pipe, then backfill and compact another 2-3cm thick layer of planting soil to avoid the infiltration pipe network being exposed on the slope surface, then further backfill and compact the water storage and supply area above it, and then excavate a drainage ditch at the bottom of the slope according to the design requirements. The drainage ditch is located above the connecting pipe I.

[0026] (5) Carry out anchor bolt construction and fix the bolt body: Complete the drilling, cleaning, bolt placement and grouting according to the position obtained by design and layout. The anchor bolts are arranged in a regular hexagon. The depth of the anchor bolts is more than 1m greater than the sliding surface of the local expansive soil slope or the atmospheric influence depth of the expansive soil slope. After the grout solidifies and reaches the strength requirements, install the anchor plate and fix it with nuts. Weld long nails on the anchor plate so that the seepage network is subjected to force along the direction of the anchor bolt. At the same time, spray a protective water layer on the surface of the stainless steel nail to make the stainless steel nail have better durability.

[0027] (6) Planting slope protection vegetation: Select slope protection vegetation with strong root growth ability, good resistance and suitable for artificial planting. After the seeding is completed, a film should be added to keep it moist and warm. The film can be removed when the grass grows to 3-5cm. However, watering and fertilization should still be carried out for a certain period of time to ensure good root growth of the slope protection vegetation.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] 1. The composite pad adopts a three-layer composite structure. The high-density sponge in the middle layer can absorb a large amount of water. When water penetrates the surface soil and enters the composite pad, the high-density sponge can effectively absorb the water into its interior. At the same time, when it is squeezed and deformed, it can discharge the water into the water storage tank through the diversion pipe, effectively preventing water from penetrating deeper into the soil, thereby reducing the damage caused by the expansion of expansive soil when it encounters water.

[0030] 2. The composite pad has recoverable deformation capacity, which allows the expansive soil slope to undergo a certain degree of deformation, while absorbing the expansion force, greatly reducing the slope damage caused by the deformation of the expansive soil.

[0031] 3. The anchor bolts are arranged in a hexagonal pattern, which makes the influence range of the anchor bolts more reasonable. At the same time, the anchor bolts can be prestressed to give the high-density sponge a certain amount of initial compression.

[0032] 4. The guide tube has a porous structure, which has a good function of collecting water, and the V-shaped structure at the bottom makes its guiding effect more obvious.

[0033] 5. The water circulation system can stabilize the slope water. By using the seepage pipe network and water pumps, water is supplied when the expansive soil slope is significantly dry and shrinking, thus maintaining the slope water stability. While preventing the expansive soil from shrinking, the slope vegetation is irrigated, maintaining the stability of the slope ecosystem. The mesh structure of the seepage pipe network can also reinforce the surface soil. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the layout of the flexible ecological support structure for expansive soil slopes described in this invention.

[0035] Figure 2 This is a schematic diagram of the composite layer structure of the flexible ecological support structure for expansive soil slopes described in this invention.

[0036] Figure 3 The diagram shows the right and side views of the diversion pipe structure of the flexible ecological support structure for expansive soil slopes described in this invention.

[0037] Figure 4 This is a schematic diagram of the seepage pipe network structure of the flexible ecological support structure for expansive soil slopes described in this invention.

[0038] Figure 5 This is a schematic diagram of the water storage tank structure of the flexible ecological support structure for expansive soil slopes described in this invention.

[0039] Figure 6 This is a schematic diagram of the water collection tank structure of the flexible ecological support structure for expansive soil slopes described in this invention.

[0040] Figure 7 This is a schematic diagram of the water flow channel converter structure of the flexible ecological support structure for expansive soil slopes described in this invention.

[0041] The diagram is marked as follows: 1. Interception ditch; 2. Planting soil layer; 3. Infiltration pipe network; 4. Expansive soil layer; 5. Composite pad; 6. Diversion pipe; 7. Anchor bolt; 8. Anchor plate; 9. Water storage tank; 10. Connecting channel; 11. Drainage ditch; 12. Water collection tank; 13. Rectangular interface; 14. Circular outlet; 15. Water flow channel converter; 16. Converter outlet; 17. Water pump connection port; 301. Infiltration hole; 501. Anchor bolt protective sleeve; 502. Polymer drainage board; 503. Geotextile; 504. High-density sponge; 505. Polystyrene foam board; 505. Water inlet hole; 601. V-shaped water diversion channel; 602. Second connecting pipe; 901. First connecting pipe; 902. Equipment connection channel port; 903. Detailed Implementation

[0042] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0043] Example 1

[0044] like Figure 1 As shown, the flexible ecological support structure for expansive soil slopes described in this invention comprises components including a drainage ditch 1, a seepage pipe network 3, a composite pad 5, anchor bolts 7, a drainage ditch 11, and a water circulation system. The specific structure and connection relationships of the components are as follows:

[0045] like Figure 2 As shown, the composite pad 5 is a sandwich structure composed of a drainage board 502, a sponge layer 504, and a polystyrene foam board 505. The drainage board 502 is a 5cm thick polymer plastic board, and the sponge layer 504 has a density of not less than 25kg / m³. 3 The system includes a high-density sponge with a long-term shrinkage rate of less than 5%, and a sponge layer 504 with a thickness of not less than 30cm. The bottom of the sponge layer 504 has three rows of circular tube channels for placing the drainage pipe 6. Geotextile 503 is placed between the drainage board 502 and the sponge layer 504 and connected by special nails. The polystyrene foam board 505 has a thickness of not less than 10cm and is tightly connected to the sponge layer 504 by polyethylene foam adhesive. The protective layer 501 is a hollow cylindrical protective pad with an inner diameter of 30mm and an outer diameter of 35mm.

[0046] The anchor bolts 7 are arranged in a regular hexagonal pattern, and the holes of the anchor bolts 7 coincide with the protective layer 501.

[0047] The water circulation system consists of a guide pipe 6, a water storage tank 9, and a seepage pipe network 3. The guide pipe 6 is a UPVC water pipe with an inner diameter of 25mm and a thickness of 2mm. The guide pipe 6 has water inlet holes 601 reserved on the side and top. A V-shaped water inlet groove with a depth of 1mm is set at the bottom of the guide pipe 6. The water storage tank 9 is a reinforced concrete cube with a side length of 100cm and a thickness of 5cm. The water storage tank 9 has five water outlets at the bottom. One end of the water flow channel converter 15 is connected to the water pump, and the other end is connected to the seepage pipe network 3 through the second connecting pipe 901. The second connecting pipe 901 is connected to the guide pipe 6 through the water collection tank 12. The connecting channel 10 is a UPVC pipe with an inner diameter of 40mm and a thickness of 2.5mm. The equipment connection channel 903 is located at the top corner of the water storage tank 9. The equipment connection channel 903 is used to install the water pump access line. The seepage pipe network 3 has a PVC steel wire pipe with an inner diameter of 10mm and a thickness of 2.5mm. The seepage pipe network 3 has seepage holes 301 at the top, with the seepage holes near the bottom of the slope having a diameter of 1mm and the seepage holes near the top of the slope having a diameter of 2mm. The seepage pipe network 3 is fixed by anchor plates 7 connected by nails.

[0048] Example 2

[0049] This embodiment is an example of the construction method for the flexible ecological support structure of expansive soil slope according to the present invention, including the following steps:

[0050] (1) Slope trimming: Excavate a portion of the expansive soil slope according to the design requirements to make the slope surface flat and achieve the slope required by the design.

[0051] (2) Excavate intercepting ditch 1 and water storage tank 9, and lay pipelines: Excavate the intercepting ditch 1 at the top of the slope according to the design requirements, and excavate the water storage tank 9 at the bottom of the slope 1m away from the drainage ditch and grout to form a reinforced concrete cube structure. After the water storage tank 9 has a certain strength, install the water pump and control line. At the same time, complete the connection of the water pump, the water flow channel converter 15 and the connecting pipe I 902 inside the water storage tank 9. The water pump outlet is connected to the water pump connection port 17 through a flexible joint, and the converter outlet 16 is connected to the connecting pipe I 902 by a flange connection. Then, the connecting pipe I and the connecting channel II are extended to the foot of the slope outside the water storage tank 9 using PVC pipes of the corresponding diameter.

[0052] (3) Measure and lay out the lines, lay the composite pad 5, and backfill the expansive soil layer 4. Mark the anchor bolt positions according to the design requirements, align the anchor bolt protective sleeve 501 with the anchor bolt positions and lay the fixed composite pad 5 tightly against the slope. At the same time, connect the diversion pipe 6 to the water collection tank 12 and seal it. The diversion pipe 6 is connected to the PVC pipe of the same diameter in the rectangular interface 13 by adhesive bonding. Then the circular outlet is connected to the connecting pipe II 901 through the PVC pipe of the same diameter. The connecting pipe I 902 extends upward a certain distance using a bend. Finally, take soil from the local area to backfill the expansive soil layer 4 and compact it to ensure the stability of the slope without greatly affecting the deformation capacity of the high-density sponge 504.

[0053] (4) Backfill planting soil, lay infiltration pipe network 3, and backfill and compact the bottom of the slope: lay 10cm planting soil on the surface of the expansive soil layer 4, lay and fix the infiltration pipe network 3 according to the layout position and connect it with the first connecting pipe 902, and then backfill a layer of 2-3cm thick planting soil to avoid exposing the infiltration pipe network 3 to the slope surface, so that the infiltration pipe network 3 has better durability. Then backfill the top of the water storage tank and compact it to a certain extent. Then excavate the drainage ditch at the bottom of the slope according to the design requirements. The drainage ditch is located above the connecting pipe I.

[0054] (5) Carry out anchor bolt construction and fix the bolt body: complete the drilling, cleaning, bolt placement and grouting according to the design and layout position. The anchor bolts are arranged in a regular hexagonal shape. The depth of the anchor bolts is more than 1m greater than the sliding surface of the local expansive soil slope or the atmospheric influence depth of the expansive soil slope. After the grout solidifies and reaches the strength requirements, install the anchor plate 8 and fix it with nuts. Weld stainless steel king nails on the anchor plate 8 so that the seepage pipe network 3 is subjected to force along the anchor bolt direction, thereby exerting its slope protection effect. At the same time, spray a protective layer on the surface of the stainless steel king nails to make the stainless steel king nails have better durability.

[0055] (6) Planting slope protection vegetation: Select slope protection vegetation with strong root growth ability, good resistance and suitable for artificial planting. After the seeding is completed, a film should be added to keep it moist and warm. The film can be removed when the grass grows to 3-5cm. However, watering and fertilization should still be carried out for a certain period of time to ensure good root growth of the slope protection vegetation.

[0056] The technical solution of the present invention has been described in conjunction with the embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. It should be noted that any obvious modifications, equivalent substitutions, or other improvements made by those skilled in the art without departing from the inventive concept should be included within the scope of protection of the present invention.

Claims

1. An expansive soil slope flexible ecological support structure, characterized in that, The components include a composite cushion plate, anchor rods, a water interception and drainage ditch, and a water circulation system. The composite cushion plate is a sandwich structure composed of a drainage plate, a sponge layer, and a polystyrene foam plate. The anchor rods are arranged in a hexagonal pattern at the set positions. The water interception and drainage ditch is designed to have a rectangular or trapezoidal cross section according to the calculated water flow rate. The water circulation system includes a flow guide pipe, a water storage pool, a water seepage pipe network, a water pump, a water flow channel converter, a water collecting tank, a first connecting pipeline, and a second connecting pipeline.

2. The expansive soil slope flexible ecological support structure according to claim 1, wherein, The composite cushion plate is 5cm thick polymer plastic drainage board, 30cm thick high-density sponge with density not less than 25kg / m 3 , polystyrene foam board with thickness not less than 10cm, and the inner diameter of the flow guide pipe is 25mm and the thickness is 2mm.

3. The expansive soil slope flexible ecological support structure according to claim 1, wherein, The anchor rods are arranged in a hexagonal pattern with a side length of 3 m.

4. The expansive soil slope flexible ecological support structure according to claim 1, wherein, The first connecting pipeline is a UPVC pipe with an outer diameter of 40 mm and a wall thickness of 2.5 mm.

5. The expansive soil slope flexible ecological support structure according to claim 1, wherein, The second connecting pipeline is a UPVC pipe with an outer diameter of 75 mm and a wall thickness of 5.6 mm.

6. The expansive soil slope flexible ecological support structure according to claim 1, wherein, The water storage pool is a reinforced concrete cube with a side length of 100 cm and a thickness of 5 cm.

7. The expansive soil slope flexible ecological support structure according to claim 1, wherein, The water seepage pipes in the water seepage pipe network are PVC steel wire pipes with an inner diameter of 10 mm, a wall thickness of 2.5 mm, and an orifice diameter of 2 mm.

8. The expansive soil slope flexible ecological support structure according to claim 1, wherein, The water seepage pipe network is fixed to the slope surface by stainless steel nails, which are fixed to the anchor cushion plate by welding.

9. The method of constructing a flexible ecological support structure for an expansive soil slope according to claim 1, wherein The method includes the following steps: (1) Trim the slope surface, excavate a part of the expansive soil slope according to the design requirements, and trim the slope surface to meet the design slope requirements. (2) Excavate the water interception ditch and the water storage pool, and arrange the pipelines: excavate the water interception ditch at the top of the slope according to the design requirements, excavate the water storage pool at a distance of 1 m from the designed drainage ditch at the bottom of the slope, and form a reinforced concrete cube structure by grouting, install the water pump and control circuit after the water storage pool has a certain strength, and complete the connection of the water pump, water flow channel converter, and first connecting pipeline inside the water storage pool, then extend the second connecting pipeline outside the water storage pool to the slope foot using a PVC pipe with corresponding pipe diameter, and extend the first connecting pipeline upward. (3) Measure the release line, lay composite pad, and backfill the expansive soil layer: Mark the anchor rod eye position according to the design requirements, align the anchor rod protective sleeve with the anchor rod eye position, and lay and fix the composite pad close to the slope surface. At the same time, connect the flow guide pipe with the water collection tank and do waterproof sealing work. The circular water outlet of the water collection tank is connected with the second connecting pipeline through a PVC pipe with the same pipe diameter. Finally, the expansive soil layer is backfilled with local soil and compacted to a certain extent; (4) Backfill planting soil, lay seepage pipe network, and backfill and compact the slope bottom: Backfill and compact 10 cm thick planting soil on the surface of the expansive soil layer, lay and fix the seepage pipe network according to the design and release line position, and complete the connection with the first connecting pipeline. Then, backfill and compact a layer of 2-3 cm thick planting soil to avoid exposing the seepage pipe network to the slope surface. Subsequently, further backfill and compact the water storage tank to a certain extent. Then, excavate a drainage ditch at the bottom of the slope according to the design requirements. The drainage ditch is located above the first connecting pipeline; (5) Perform anchor rod construction and fix the rod body: Complete hole forming, hole cleaning, rod body placement, and grouting according to the design and release line position. After the grout solidifies to the required strength, install the anchor pad and fix it with a nut. Weld a stainless steel pipe anchor nail on the anchor pad to make the seepage pipe network receive force in the direction of the anchor rod. At the same time, spray a protective layer on the surface of the stainless steel anchor nail to make the anchor nail more durable; (6) Plant slope protection vegetation: Select slope protection vegetation with strong root growth ability, good stress resistance, and suitable for artificial planting. After sowing, cover a layer of film for moisture and temperature preservation. Remove the film when the grass grows to 3-5 cm. However, periodic watering and fertilization are still required to ensure good growth of the slope protection vegetation roots.

Images