Sustainable ecological restoration structure and method for steep slope

Abstract

The application discloses a sustainable ecological restoration structure for a steep slope, which comprises a surface soil supporting structure, a deep soil attaching structure, a rainwater collecting and storing structure and a surface artificial soil layer. The surface soil supporting structure comprises a plurality of distributed bamboo-wood anchor rods arranged uniformly on the steep bare slope. The deep soil attaching structure comprises a bamboo-woven soil bin arranged at the midpoint of each square of the distributed bamboo-wood anchor rods in a square grid structure. The rainwater collecting and storing structure comprises a supporting bamboo-wood anchor rod arranged at the lower part of the bamboo-woven soil bin. The side surface of the part of the supporting bamboo-wood anchor rod exposed to the steep slope is further provided with an X-shaped segmentation baffle. The surface artificial soil layer is a hammering full-paved artificial soil layer. A corresponding restoration method is also disclosed. The application has the advantages of convenient material selection, environmental protection, sufficient soil layer thickness, soil locking structure and continuous water supply, and has good sustainable ecological restoration capacity.

Description

Technical Field

[0001] This invention belongs to the field of ecological restoration technology, and specifically relates to a sustainable ecological restoration structure and method for steep slopes. Background Technology

[0002] Currently, vegetation restoration of artificially exposed slopes caused by various engineering projects mainly adopts planting bags and hydroseeding methods. However, in areas with harsh ecological environments, the above two methods are unsustainable, that is, nutrients and water are quickly lost, plants die, and the slope is exposed again. The root causes are as follows: (1) Existing artificial measures have not built a sufficient ecological cycle restoration system. The thickness of the culture medium is less than the local minimum soil layer thickness, which is at least functionally insufficient. At the same time, the culture medium has not been integrated into the local ecological soil layer. In short, the culture medium has not formed sufficient sustainability. (2) The sustainability of existing engineering measures is insufficient. The lack of sustainability and cycle characteristics in the moisture retention and fertility of the measures is the root cause of the failure of the measures. Before the failure, a truly functional soil layer was not established. (3) The problem of erosion and soil loss caused by steep terrain. The steep terrain slopes are strongly eroded, and rainwater loss is serious. The exposed slopes lack the collection and utilization of natural water, which is only harmful and not beneficial, and exacerbates the difficulty of restoration. Therefore, there is an urgent need to develop artificial high-performance soil with sufficient thickness and sustainable and self-circulating methods for the ecological restoration of steep slopes, so as to achieve sustainable ecological restoration of steep slopes. Summary of the Invention

[0003] The present invention aims to address the problems in the existing technology of ecological restoration of steep slopes with harsh ecological environments, such as easy loss of nutrients and water, easy death of plants, and unsustainable re-exposure of the slope.

[0004] To address the above problems, the technical solution adopted by the present invention is: a sustainable ecological restoration structure for steep slopes, comprising: a surface soil support structure, a deep soil attachment structure, a rainwater collection and storage structure, and a surface artificial soil layer.

[0005] The surface soil support structure includes multiple distributed bamboo and wood anchors evenly arranged on steep, bare slopes. A square grid is formed between the multiple distributed bamboo and wood anchors. Half of the length of each distributed bamboo and wood anchor is driven into the slope surface, and the other half is exposed.

[0006] The deep soil attachment structure includes bamboo-woven soil cells arranged at the midpoint of each square of the distributed bamboo and wood anchors in a square grid structure. Each bamboo-woven soil cell is a hollow cylindrical sealed-bottom bamboo basket. The bottom of the cylindrical sealed-bottom bamboo basket is sealed, while the top is open. The lower end of the cylindrical sealed-bottom bamboo basket is inserted into a pre-made cell hole at the midpoint of each square of the distributed bamboo and wood anchors, while the upper end is exposed. The exposed length is the same as the exposed length of the distributed bamboo and wood anchors. Artificial soil can be lightly filled into the bamboo-woven soil cells with a hammer, or artificial soil can be pre-filled into the bamboo-woven soil cells before being inserted into the cell holes.

[0007] The rainwater collection and storage structure includes supporting bamboo and wood anchors arranged at the bottom of the bamboo-woven soil grid. The length of the supporting bamboo and wood anchors is the same as the length of the distributed bamboo and wood anchors. Half of the length of the supporting bamboo and wood anchors is driven into the slope surface, and the other half is exposed. A waterproof plastic sheet is set between the supporting bamboo and wood anchors and the bamboo-woven soil grid. An X-shaped dividing baffle is also combined on the side of the part of the supporting bamboo and wood anchors that is exposed on the steep slope. The X-shaped wooden dividing baffle and the waterproof plastic sheet form a rainwater collection system, and the inclined holes of the grid serve as a rainwater storage system.

[0008] The surface artificial soil layer is an artificial soil layer that is gently hammered and spread between the bamboo woven soil grid and the exposed part of the bamboo woven grid.

[0009] Furthermore, the method for preparing the surface artificial soil layer is as follows: artificial soil is prepared by grinding engineering waste, with a clay content of not less than 10% and a maximum particle size of not more than 2 mm; plant fibers are prepared by collecting locally available plant leaves, stems, and roots, crushing them to form plant fibers; the artificial soil and plant fibers are mixed in proportion by weight, and a water-retaining agent is added, and the mixture is stirred to form artificially prepared high-performance soil for later use.

[0010] Furthermore, the steep exposed slope is an artificial slope with a slope greater than 45°-φ / 2, where φ represents the friction angle of the slope's rock and soil. This artificial slope is formed by various engineering projects, including mining, transportation engineering, and water conservancy.

[0011] Furthermore, the incident angle of the distributed bamboo and wood anchors, bamboo-woven soil grids, and supporting bamboo and wood anchors driven into the steep, exposed slope is 20° to 30°.

[0012] Furthermore, the X-shaped wooden dividing baffle and the bamboo-woven soil grid are connected to the supporting bamboo and wooden anchor rods by pins or nails, and the waterproof plastic sheet is nailed to the X-shaped wooden dividing baffle.

[0013] Furthermore, it also includes a protective structure and an anti-erosion structure, which includes a bamboo woven protective layer laid on the surface of the artificial soil layer. The bamboo woven protective layer, together with the supporting bamboo and wood anchors and the bamboo woven soil grid, are tied together with bamboo strips to provide attachment support and protection for the surface soil.

[0014] As another aspect of the present invention, a method for sustainable ecological restoration of steep slopes is also provided, comprising the following steps:

[0015] Step 1: For exposed steep slopes formed by various projects such as mining, transportation engineering, and water conservancy, and for artificial slopes with a slope greater than 45°-φ / 2, the slopes are first preliminarily shaped.

[0016] Step 2: Soil preparation. Artificial soil is prepared by grinding engineering waste, with a clay content of not less than 10% and a maximum particle size of not more than 2 mm. Plant fiber preparation. Locally available plant leaves, stems and roots are collected, crushed and formed into plant fiber. Artificial soil and plant fiber are mixed in proportion by weight, and then water-retaining agent is added. The mixture is stirred to form artificial high-performance soil for later use.

[0017] Step 3: Construct a surface soil support structure and install distributed bamboo and wood anchors. The bamboo and wood anchors form a square grid. Half of the length of each distributed bamboo and wood anchor is driven into the slope surface, and the other half is exposed, providing attachment support for the surface artificial soil layer, the construction of the protective face and the erosion prevention structure.

[0018] Step 4: Construct a deep soil attachment structure. For each square of the distributed bamboo and wood anchors in the square grid structure, drill holes for the bamboo woven soil grid. The bamboo woven soil grid is a hollow cylindrical bamboo basket structure with a sealed bottom and an open top. The lower end of the cylindrical bamboo basket is inserted into the pre-drilled holes at the midpoint of each square of the distributed bamboo and wood anchors, while the upper end is exposed, with the exposed length being the same as the exposed length of the distributed bamboo and wood anchors. Artificial soil is then gently filled into the bamboo woven soil grid with a hammer. Alternatively, artificial soil can be pre-filled into the bamboo woven soil grid before inserting it into the holes.

[0019] Step 5: Construct a rainwater collection and storage structure. Under the bamboo-woven soil grid, place supporting bamboo anchors of the same length as the distributed bamboo anchors. Half of the length of the supporting bamboo anchors is driven into the slope, and the other half is exposed. A waterproof plastic sheet is placed between the supporting bamboo anchors and the bamboo-woven soil grid. X-shaped dividing baffles are also combined on the side of the exposed part of the supporting bamboo anchors on the steep slope. The X-shaped wooden dividing baffles and the waterproof plastic sheet form a rainwater collection system, and the inclined holes of the grid serve as a rainwater storage system.

[0020] Step 6: Construct the surface soil structure by gently pounding and spreading artificial high-performance soil between the bamboo-woven soil grid and the exposed part of the bamboo-woven soil grid.

[0021] Step 7: Construct the protective and erosion-proof structure. Lay a bamboo woven protective layer on the surface of the artificial soil layer. The bamboo woven protective layer, the supporting bamboo and wood anchors, and the bamboo woven soil grid are tied together with bamboo strips to provide attachment support and protection for the surface soil.

[0022] Furthermore, in step 2, the weight ratio of artificial soil and plant fiber is 9:1, and the amount of water-retaining agent added is 50g to 70g per ton.

[0023] Furthermore, if it is difficult to drive the distributed bamboo and wood anchors into the steep slope during step 3, an iron pointed cap structure is fitted onto the front end of the bamboo and wood anchor.

[0024] The beneficial effects and features of this invention are:

[0025] 1. The sustainable ecological restoration method for steep slopes of the present invention provides sufficient soil layer thickness to meet the growth needs of plants. By artificially preparing high-performance soil, a topsoil and deep soil system is constructed. The soil layer thickness is far greater than the soil profile depth of general mountainous areas, ensuring the growth needs of grass, shrubs and trees, and ensuring the ecological restoration efficiency by utilizing sufficient thickness.

[0026] 2. The sustainable ecological restoration method for steep slopes of the present invention has a strong attachment support system that ensures that the soil layer is tightly bonded to the steep slope. Through a combination of long and short bamboo and wood anchors, bamboo woven grids, X-shaped baffles and bamboo strip mats for the facing, the soil layer is tightly locked to the slope surface of the steep slope. All the materials used are readily available.

[0027] 3. The sustainable ecological restoration method for steep slopes of the present invention has a water storage structure that can be recycled and continuously supplied with water. By adding water-retaining agents to artificially prepared high-performance soil, the soil's ability to acquire water in the short term is increased. In addition to providing support and locking functions, the X-shaped baffle, together with the plastic pad and the inclined holes, forms a water storage system that forms the surface soil and deep soil. It can continuously acquire the replenishment of rainwater and continuously provide the water required for plant growth.

[0028] 4. The sustainable ecological restoration method for steep slopes of the present invention has the advantages of being environmentally friendly, using local materials, and not changing the original soil and rock properties. The method consists of artificially prepared high-performance soil, topsoil, bamboo-woven soil lining, bamboo and wood anchors, baffles, and bamboo mats, forming a technical system for the sustainable ecological restoration of steep terrain slopes. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the elevation structure of a preferred embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of a side cross-sectional structure of a preferred embodiment of the present invention;

[0031] Figure 3This is a partially enlarged structural diagram of the X-shaped wooden dividing baffle in a preferred embodiment of the present invention;

[0032] The labels in the diagram represent: 1-Distributed bamboo and wood anchors; 2-Bamboo-woven soil grate; 3-Artificially prepared soil layer; 4-Supporting bamboo and wood anchors; 5-X-type wooden dividing baffle; 6-Waterproof plastic sheet; 7-Bamboo-woven protective layer. Detailed Implementation

[0033] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please refer to Figures 1-2 This invention relates to a sustainable ecological restoration structure for steep slopes, comprising: a surface soil support structure, a deep soil attachment structure, a rainwater collection and storage structure, a surface artificial soil layer, and a structural protective and erosion-resistant structure.

[0035] The surface soil support structure includes multiple distributed bamboo and wood anchors 1 evenly arranged on steep, exposed slopes. A square grid is formed between the multiple distributed bamboo and wood anchors 1. The preferred size of the square grid is a horizontal spacing of 1.0m × a vertical spacing of 1.0m. Half of the length of each distributed bamboo and wood anchor is driven into the slope surface, and the other half is exposed. The distributed bamboo and wood anchors provide attachment support for the artificially prepared high-performance soil on the surface layer and for the final bamboo strip layer of the protective layer.

[0036] The deep soil attachment structure includes bamboo-woven soil cells 2 arranged at the midpoint of each square of the distributed bamboo and wood anchors in a square grid structure. The bamboo-woven soil cells 2 are hollow cylindrical sealed-bottom bamboo basket structures. The bottom of the cylindrical sealed-bottom bamboo basket structure is sealed, and the top is open. The lower end of the cylindrical sealed-bottom bamboo basket is inserted into the pre-made cells hole at the midpoint of each square of the distributed bamboo and wood anchors, and the upper end is exposed. The exposed length is the same as the exposed length of the distributed bamboo and wood anchors. Artificial soil is lightly filled into the bamboo-woven soil cells 2 with a hammer. Alternatively, artificial soil 2 can be pre-filled into the bamboo-woven soil cells before being inserted into the cells hole.

[0037] Please refer to Figure 3The rainwater collection and storage structure includes supporting bamboo and wood anchors 4 arranged at the bottom of the bamboo-woven soil grid 2. The length of the supporting bamboo and wood anchors 4 is the same as the length of the distributed bamboo and wood anchors 1. Half of the length of the supporting bamboo and wood anchors 4 is driven into the slope surface, and the other half is exposed. A waterproof plastic sheet 6 is set between the supporting bamboo and wood anchors 4 and the bamboo-woven soil grid 2. An X-shaped dividing baffle 5 is also combined on the side of the part of the supporting bamboo and wood anchors 4 that is exposed on the steep slope. The X-shaped wooden dividing baffle 5 and the waterproof plastic sheet 6 form a rainwater collection system, and the inclined holes of the grid serve as a rainwater storage system.

[0038] The surface artificial soil layer is a layer of artificial soil (high-performance soil layer) that is gently pounded and spread between the bamboo woven soil cage 2 and the exposed part of the bamboo woven cage. Specifically, the preparation method of the surface artificial soil layer is as follows: artificial soil is prepared by grinding engineering waste, with a clay content of not less than 10% and a maximum particle size of not more than 2mm; plant fibers are prepared by collecting locally available plant leaves, stems, and roots, and crushing them into plant fibers; the artificial soil and plant fibers are mixed in a certain weight ratio (preferably 9:1), and a water-retaining agent is added (preferably 60g of water-retaining agent per ton), and the mixture is stirred to form artificially prepared high-performance soil for later use.

[0039] The aforementioned steep, exposed slopes are artificial slopes with a gradient greater than 45°-φ / 2, where φ represents the friction angle of the slope's rock and soil. These artificial slopes are formed by various engineering projects, including mining, transportation engineering, and water conservancy projects.

[0040] The aforementioned distributed bamboo and wood anchors 1, bamboo-woven soil cages 2, and supporting bamboo and wood anchors 4 are driven into steep, exposed slopes at an angle of incidence of 20° to 30°, preferably 25°.

[0041] The aforementioned X-shaped wooden dividing baffle 5 and bamboo woven soil cage 2 are connected to the supporting bamboo and wooden anchor rod 4 by pins or nails. The waterproof plastic sheet 6 is nailed to the X-shaped wooden dividing baffle 5. To prevent the waterproof plastic sheet 6 from being torn, it can be laid loosely with some allowance.

[0042] The aforementioned protective and erosion-resistant structure includes a bamboo woven protective layer 7 (bamboo mat) laid on the surface of the top layer of artificial soil. The bamboo woven protective layer 7, together with the supporting bamboo and wood anchor rods 4 and the bamboo woven soil grid 2, are tied together with bamboo strips to provide attachment support and protection for the top layer of soil.

[0043] As another aspect of the present invention, a method for sustainable ecological restoration of steep slopes is also provided, comprising the following steps:

[0044] Step 1: For steep and exposed slopes formed by various projects such as mining, transportation engineering, and water conservancy, and for artificial slopes with a slope greater than 45°-φ / 2, the slopes are first preliminarily shaped.

[0045] Step 2: High-performance soil preparation. Artificial soil is prepared by grinding engineering waste, with a clay content of not less than 10%, a maximum particle size of not more than 2 mm, and good gradation. Plant fiber is prepared by collecting locally available plant leaves, stems, and roots, crushing them into plant fiber. The artificial soil and plant fiber are mixed in proportion by weight, and then a water-retaining agent is added (preferably 60g of water-retaining agent per ton) and stirred to form artificially prepared high-performance soil for later use.

[0046] Step 3: Construct a surface soil support structure and install distributed bamboo and wood anchors 1. The bamboo and wood anchors form a square grid with a horizontal spacing of 1.0m and a vertical spacing of 1.0m, an incident angle of 25°, a length of 1.0m, and are driven into the slope surface to a depth of 0.5m, with 0.5mm exposed. This provides attachment support for the artificially prepared high-performance soil on the surface and for the final bamboo strip layer. If it is difficult to drive the anchors in, consider attaching an iron pointed cap structure to the front end of the bamboo and wood anchors 1.

[0047] Step 4: Construct a deep soil attachment structure, apply bamboo woven soil grid 2, drill grid holes with a diameter of 0.2-0.3m in the center of the square grid bamboo and wood anchor rod (higher values ​​can be used for slope rock and soil with higher strength, and lower values ​​can be used for slightly lower strength), incident angle 25°, length 1.0m, drill into the slope for 1.0m, weave a cylindrical bamboo basket with a length of 1.5m and a diameter of 0.2-0.3m on the outside to complete the bamboo woven soil grid production, put in the grid hole for 1.0m, expose 0.5m of bamboo weaving, and lightly hammer in 0.8-1.5m of artificially prepared high-performance soil (3);

[0048] Step 5: Construct a rainwater collection and storage structure. Drive a supporting bamboo and wood anchor 4 0.1m below the bamboo woven soil grid 2, with an incident angle of 25° and a length of 1.0m. Drive the anchor 0.5m into the slope and expose 0.5m. Hang an X-shaped wooden dividing baffle 5. Place a waterproof plastic sheet 6 at the contact point between the X-shaped wooden dividing baffle 5 and the bamboo woven soil grid 2. Connect the X-shaped wooden dividing baffle 5 and the bamboo woven soil grid 2 to the supporting bamboo and wood anchor 4 with pins or nails. Nail the waterproof plastic sheet 6 to the X-shaped wooden dividing baffle 5. To prevent the waterproof plastic sheet 6 from being torn, it can be laid loosely with some slack. The X-shaped wooden dividing baffle 5 and the waterproof plastic sheet 6 form a rainwater collection system, and the inclined holes of the grid serve as a rainwater storage system.

[0049] Step 6: Construct the surface soil structure by gently pounding and spreading artificial high-performance soil between the bamboo woven soil grid 2 and the exposed part of the bamboo woven soil grid.

[0050] Step 7: Construct a protective and erosion-resistant structure. Lay a bamboo woven protective layer 7 on the surface. The bamboo woven protective layer 7, the supporting bamboo and wood anchor rods 4, and the bamboo woven soil cages 2 are tied together with bamboo strips to provide adhesion support and protection for the surface soil.

[0051] This invention provides a base layer for the ecological restoration of steep slopes, consisting of a topsoil layer of a certain thickness and a deep soil layer, which is thicker than the soil layer in typical mountainous areas and has a certain degree of sustainability. Bamboo mats, distributed bamboo and wood anchors, bamboo woven grids, and baffles provide attachment support for the base layer. Water-retaining agents, rainwater collection and storage structures provide short-term and long-term water support for the base layer. Sufficient base layer, strong support, and recyclable water provide strong ecological restoration support for steep slopes. This method is applicable to the sustainable ecological restoration of exposed steep slopes caused by various engineering projects.

[0052] 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 structural relationships and principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. A sustainable ecological restoration structure for steep slopes, characterized in that, include: Topsoil support structure, deep soil Soil attachment structure, rainwater collection and storage structure and topsoil layer; The surface soil support structure includes multiple distributed bamboo and wood anchors (1) evenly arranged on steep and bare slopes, forming a square grid between the multiple distributed bamboo and wood anchors (1), with half of the length of each distributed bamboo and wood anchor driven into the slope surface and the other half exposed. The deep soil attachment structure includes bamboo-woven soil cells (2) arranged at the midpoint of each square of the distributed bamboo and wood anchors in a square grid structure. The bamboo-woven soil cells (2) are hollow cylindrical sealed-bottom bamboo baskets. The bottom of the cylindrical sealed-bottom bamboo basket structure is sealed, and the top is open. The lower end of the cylindrical sealed-bottom bamboo basket is inserted into the pre-made cells hole at the midpoint of each square of the distributed bamboo and wood anchors, and the upper end is exposed. The exposed length is the same as the exposed length of the distributed bamboo and wood anchors. Artificial soil is lightly filled into the bamboo-woven soil cells (2) or artificial soil is pre-filled into the bamboo-woven soil cells before being placed into the cells hole. The rainwater collection and storage structure includes supporting bamboo and wood anchors (4) arranged at the bottom of the bamboo woven soil grid (2). The length of the supporting bamboo and wood anchors (4) is the same as the length of the distributed bamboo and wood anchors (1). Half of the length of the supporting bamboo and wood anchors (4) is driven into the slope surface, and the other half is exposed. A waterproof plastic sheet (6) is set between the supporting bamboo and wood anchors (4) and the bamboo woven soil grid (2). An X-shaped dividing baffle (5) is also combined on the side of the part of the supporting bamboo and wood anchors (4) that is exposed on the steep slope. The X-shaped dividing baffle (5) and the waterproof plastic sheet (6) form a rainwater collection system, and the grid holes serve as a rainwater storage system. The surface artificial soil layer is an artificial soil layer that is gently hammered and spread between the bamboo woven soil grid (2) and the exposed part of the bamboo woven soil grid (2).

2. The sustainable ecological restoration structure for steep slopes according to claim 1, characterized in that: The method for preparing the surface artificial soil layer is as follows: artificial soil is prepared by grinding engineering waste, with a clay content of not less than 10% and a maximum particle size of not more than 2mm; plant fiber is prepared by collecting locally available plant leaves, stems and roots, crushing them into plant fiber; the artificial soil and plant fiber are mixed in proportion by weight, and then a water-retaining agent is added and stirred to form artificial high-performance soil for later use.

3. The sustainable ecological restoration structure for steep slopes according to claim 1, characterized in that: The steep, exposed slope is defined as having a slope greater than 45° - φ / 2, where φ represents the friction angle of the slope's rock and soil. This slope is formed by various engineering projects, including mines, transportation projects, and water conservancy projects.

4. The sustainable ecological restoration structure for steep slopes according to claim 1, characterized in that: The incident angle of the distributed bamboo and wood anchors (1), bamboo-woven soil cages (2), and supporting bamboo and wood anchors (4) driven into the steep and exposed slope is 20°~30°.

5. The sustainable ecological restoration structure for steep slopes according to claim 1, characterized in that: The X-shaped dividing baffle (5) and the bamboo-woven soil cage (2) are connected to the supporting bamboo and wood anchor rod (4) by pins or nails, and the waterproof plastic sheet (6) is nailed to the X-shaped dividing baffle (5).

6. The sustainable ecological restoration structure for steep slopes according to claim 1, characterized in that: It also includes a structural protective layer and an anti-erosion structure, which includes a bamboo woven protective layer (7) laid on the surface of the surface artificial soil layer. The bamboo woven protective layer (7) is tied together with the supporting bamboo and wood anchor rods (4) and the bamboo woven soil grid (2) by bamboo strips.

7. A sustainable ecological restoration method for steep slopes, characterized in that: Includes the following steps: Step 1: For steep exposed slopes formed by various projects such as mining, transportation engineering, and water conservancy, and for artificial slopes with a slope greater than 45°-φ / 2, the slopes are first preliminarily shaped. Step 2: Soil preparation. Artificial soil is prepared by grinding engineering waste, with a clay content of not less than 10% and a maximum particle size of not more than 2 mm. To prepare plant fiber, collect readily available local plant leaves, stems, and roots, and break them down to form plant fiber. Artificial soil and plant fiber are mixed in proportion to their weight, and then a water-retaining agent is added and stirred to form artificially prepared high-performance soil for later use. Step 3: Construct a surface soil support structure and install distributed bamboo and wood anchors (1). A square grid is formed between the bamboo and wood anchors. Half of the length of each distributed bamboo and wood anchor is driven into the slope and the other half is exposed, providing attachment support for the surface artificial soil layer, the construction of the protective surface and the erosion prevention structure. Step 4: Construct a deep soil attachment structure and construct a bamboo-woven soil grid (2). Drill grid holes at the midpoint of each square of the distributed bamboo and wood anchor rods in the square grid structure. The bamboo-woven soil grid (2) is a hollow cylindrical sealed-bottom bamboo basket structure. The bottom of the cylindrical sealed-bottom bamboo basket structure is sealed, and the top is open. The lower end of the cylindrical sealed-bottom bamboo basket structure is inserted into the grid holes pre-made at the midpoint of each square of the distributed bamboo and wood anchor rods, and the upper end is exposed. The exposed length is the same as the exposed length of the distributed bamboo and wood anchor rods. Fill the bamboo-woven soil grid (2) with artificial soil by light hammering, or fill the bamboo-woven soil grid with artificial soil in advance before inserting it into the grid holes. Step 5: Construct a rainwater collection and storage structure. Under the bamboo woven soil grid (2), arrange supporting bamboo anchors (4) of the same length as the distributed bamboo anchors (1). Half of the length of the supporting bamboo anchors (4) is driven into the slope surface, and the other half is exposed. A waterproof plastic sheet (6) is set between the supporting bamboo anchors (4) and the bamboo woven soil grid (2). An X-shaped dividing baffle (5) is also set on the side of the part of the supporting bamboo anchors (4) that is exposed on the steep slope. The X-shaped dividing baffle (5) and the waterproof plastic sheet (6) form a rainwater collection system, and the grid holes serve as a rainwater storage system. Step 6: Construct a surface artificial soil layer. Gently hammer and spread the artificial high-performance soil between the exposed parts of the bamboo woven soil grid (2) and the exposed parts of the bamboo woven soil grid (2). Step 7: Construct a protective and erosion-proof structure. Lay a bamboo woven protective layer (7) on the surface of the artificial soil layer. The bamboo woven protective layer (7), the supporting bamboo and wood anchor rods (4), and the bamboo woven soil grid (2) are tied together with bamboo strips to provide attachment support and protection for the surface soil.

8. The sustainable ecological restoration method for steep slopes according to claim 7, characterized in that: In step 2, the ratio of artificial soil to plant fiber is 9:1, and the amount of water-retaining agent added is 50g to 70g per ton.

9. The sustainable ecological restoration method for steep slopes according to claim 7, characterized in that: If it is difficult to drive the distributed bamboo and wood anchors (1) into the steep slope in step 3, an iron pointed cap structure is fitted on the front end of the bamboo and wood anchors (1).

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