Slope ecological protection method based on dry stone enclosure fish-scale pits and bottom water storage bins

Abstract

The invention relates to the technical field of side slope ecological restoration and water and soil conservation, and discloses a side slope ecological protection method based on a dry stone fence fish-scale pit and a bottom water storage bin. The method comprises the steps that steel bar anchor rods and a dry stone fence are arranged on an exposed slope surface, the overall anchoring force is enhanced through the steel bar anchor rods, and compared with a traditional dry stone structure, the anti-sliding stability is improved; a double-layer wave-shaped structure made of an HDPE material is additionally arranged on the upper portion of the dry stone fence, the wave-shaped design increases water flow resistance and reduces direct scouring of rainwater to a pit body, meanwhile, the HDPE material is high in weather resistance, the defect of weathering resistance of dry stone is overcome, then a triangular area is formed by the dry stone fence, the double-layer wave-shaped fence and an exposed slope surface, and the slope surface is protected. The pearl wool plate (water storage layer), the nutrient soil and the pisolite layer are sequentially arranged in the fish-scale pit from bottom to top, the layered design achieves the function division of water storage, plant growth and water and soil conservation, and the limitation of single soil storage of a traditional fish-scale pit is broken through.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slope ecological restoration and soil and water conservation, in particular to a slope ecological protection method based on dry-laid stone surrounding fish scale pits and bottom water storage warehouses. BACKGROUND

[0002] With the continuous expansion of human highway, railway, water conservancy, mining and other construction scales, the influence and damage to the original mountains and ecological environment are becoming more and more serious, resulting in a large number of damaged mountain slopes without vegetation coverage. These slopes are prone to serious soil erosion, landslides, collapses and other geological disasters due to lack of vegetation coverage, broken rock surface and steep slope. Due to the poor soil fertility and water retention of the slope, the traditional vegetation restoration technology has low survival rate and ecological restoration difficulty.

[0003] Common slope repair methods include slope cutting, net hanging and spray planting. When the above measures are not applicable, fish scale pit greening repair method is considered. Fish scale pit is a kind of semi-circular or crescent pit formed by artificial excavation, which is used to store soil and plant vegetation. The traditional fish scale pit technology mainly relies on manual excavation, and the process is simple, which is suitable for loess plateau and other areas. With the popularization of this technology, it is gradually used in mine slope, road slope and other scenes. However, with the complication of the use scene, the limitations of fish scale pit are gradually revealed, mainly including the following problems:

[0004] First, the water storage capacity is limited, and water cannot be supplied continuously in dry season.

[0005] Second, the pit structure is easy to be damaged by rainwater erosion.

[0006] Third, the soil is easy to be lost. SUMMARY

[0007] (I) Technical problems solved

[0008] In view of the shortcomings of the prior art, the present application provides a slope ecological protection method based on dry-laid stone surrounding fish scale pits and bottom water storage warehouses, which has the advantages of strong water storage capacity, good erosion resistance, significant ecological benefit and low maintenance cost in later period, and solves the problems of limited water storage capacity of traditional fish scale pit technology, easy damage of pit structure, easy loss of soil and low survival rate of vegetation.

[0009] (II) Technical scheme

[0010] To achieve the above object, the present application provides the following technical scheme: based on the dry masonry retaining fish scale pit and the bottom water storage bin of the slope ecological protection method, including the exposed slope surface setting the steel anchor rod and the dry masonry retaining, further comprising: the exposed slope surface is the slope to be treated, i.e. the original mountain, the steel anchor rod is located in the dry masonry retaining, and is anchored into the exposed slope surface, plays the role of anchoring, the steel anchor rod and the dry masonry retaining are perpendicular to the ground, and form a triangle with the exposed slope surface, the upper part of the dry masonry retaining is provided with a double-layer wave-shaped retaining of HDPE material, the dry masonry retaining and the double-layer wave-shaped retaining are provided with pearl wool boards on the inner side, the triangle is provided with pearl wool boards, nutrient soil and bean stone layers from bottom to top, the outer side of the dry masonry retaining and the double-layer wave-shaped retaining is sprayed with a concrete layer for reinforcement, and plants are planted in the nutrient soil.

[0011] Preferably, the anchor hole is drilled at an angle perpendicular to the ground on the exposed slope surface, the steel anchor rod is anchored with cement mortar, the steel anchor rod needs to be treated for corrosion, and is sprayed with anticorrosive paint, the dry masonry retaining is arranged on the exposed slope surface, the dry masonry retaining is dry-built in the retaining, and the steel anchor rod plays the role of structural reinforcement.

[0012] Preferably, the upper part of the dry masonry retaining is provided with a double-layer wave-shaped retaining of HDPE material, the height of the double-layer wave-shaped retaining is the same as the exposed height of the steel anchor rod, and the dry masonry retaining and the double-layer wave-shaped retaining are laid with pearl wool boards on the side close to the rock wall as a heat insulation layer.

[0013] Preferably, the dry masonry retaining and the double-layer wave-shaped retaining form a triangle with the exposed slope surface, and the bottom of the triangle is laid with pearl wool boards as a water storage layer.

[0014] Preferably, the nutrient soil is filled in the water storage layer for plant growth, and a bean stone layer is laid on the upper layer of the nutrient soil for water and soil conservation.

[0015] Preferably, at least three steel anchor rods are arranged in a single fish scale pit, and are respectively located at two ends and the middle, and the outer side of the dry masonry retaining and the double-layer wave-shaped retaining is sprayed with a C25 concrete layer for reinforcement.

[0016] Preferably, the plants are selected from strong arbor and native adapted shrubs.

[0017] The slope ecological protection method based on the dry masonry retaining fish scale pit bottom water storage bin comprises the following steps:

[0018] Step one, slope pretreatment: remove dangerous rocks, and control the flatness to be ±10 cm;

[0019] Step two, anchor rod construction: the hole diameter is greater than or equal to 25 mm, the depth is greater than or equal to 0.5 m, and the grouting pressure is 0.3-0.5 MPa;

[0020] Step three, enclosure masonry: dry masonry, HDPE enclosure is connected with steel anchor by bolt;

[0021] Step four, functional layer laying: the lap width of pearl cotton board is greater than or equal to 100mm, and water retaining agent is added to the nutrient soil.

[0022] Step five, concrete layer spraying: wet spraying process is adopted, and the spraying is completed in 1-2 times.

[0023] Step six, vegetation planting: resistant trees and local shrubs are selected and arranged in the shape of plum blossom.

[0024] Preferably, the steel anchor grouting material is M20-M25 cement mortar mixed with 3%-5% expanding agent, and the curing period is greater than or equal to 7 days, when the double-layer wave-shaped enclosure is installed, the bottom is connected with the dry masonry enclosure through L50*5 angle steel, and the bolt spacing is less than or equal to 500mm.

[0025] Preferably, biochar and compound fertilizer are added to the improved nutrient soil, the biochar addition amount is 10%-15% of the soil volume, and the compound fertilizer dosage is 400-600g / m 2 After the vegetation is planted, the grass mat is used for covering and moisture retention, and the soil moisture content is maintained to be greater than or equal to 15% during the curing period.

[0026] (Three) beneficial effects

[0027] Compared with the prior art, the present application provides a slope ecological protection method based on the dry masonry enclosure fish scale pit and the bottom water storage bin, which has the following beneficial effects:

[0028] 1. The steel anchor is vertically anchored into the slope, the dry masonry enclosure wraps it to form a triangular structure, which not only reduces the cost by using on-site stones, but also enhances the overall anchoring force by the steel anchor, compared with the traditional dry masonry structure, the anti-sliding stability is improved, in addition, the double-layer wave-shaped structure of HDPE material is added to the upper part of the dry masonry enclosure, the wave-shaped design increases the water flow resistance, reduces the direct erosion of rainwater on the pit body, at the same time, the HDPE material has strong weather resistance, which makes up for the deficiency of dry masonry in weathering resistance, then a triangular area is formed by the dry masonry enclosure, the double-layer wave-shaped enclosure and the bare slope surface, and the inside is sequentially provided with pearl cotton board (water storage layer), nutrient soil and bean stone layer, this layered design realizes the functional zoning of "water storage-plant growth-soil and water conservation", which breaks through the limitation of traditional fish scale pit single soil storage.

[0029] 2、Through the pearl wool board at the bottom of the triangle as a water storage layer, use its porous structure to absorb and store rainwater, cooperate with the water retention of the upper nutrient soil and bean stone layer, form the water supply mechanism of "short-term water storage-long-term release", solve the problem of insufficient water storage capacity of traditional fish scale pit, especially suitable for arid areas, in addition, the dry masonry stone retaining wall and the pearl wool board laid inside the double-layer wave-shaped retaining wall act as a heat insulation layer, which can adjust the temperature in the pit, reduce the damage of extreme temperature to plant roots, create a suitable environment for vegetation growth, and improve the survival rate of vegetation.

[0030] 3、Through the dry masonry stone retaining wall, the on-site block stone is directly used, which reduces the material transportation cost, avoids the high energy consumption problem of traditional concrete pouring, and meets the environmental protection concept of ecological restoration, in addition, the C25 concrete layer is sprayed outside the dry masonry stone retaining wall and the double-layer wave-shaped retaining wall, forming a rigid protective layer, which enhances the anti-erosion and anti-weathering ability of the structure, prolongs the service life of the protection facility, and the durability is significantly improved compared with the traditional vegetation slope protection technology, then the strong resistance of the trees and the local suitable shrubs is selected, combined with the configuration mode of "1 tree + 2 shrubs" in each fish scale pit device, a multi-level vegetation system is formed, which not only improves the ecological stability of the slope, but also further enhances the overall protection effect through the soil fixation of plant roots.

[0031] 4、Through the fish scale pit arranged in the form of a plum blossom on the slope surface, this layout makes the runoff form a dispersed flow on the slope surface, reduces the water impact force of a single area, compared with the traditional linear arrangement, the risk of overall erosion of the slope is reduced, and the erosion resistance of the slope is improved, in addition, through the water storage and water retention function of the water storage bin and the pearl wool board, the artificial irrigation frequency is reduced; the composite structure of dry masonry stone and concrete layer reduces the damage risk of the pit body, reduces the later maintenance cost, compared with the traditional slope greening technology, the maintenance cost is significantly reduced, and the survival rate of vegetation is improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] Fig. 1 The overall cross-sectional structure diagram of the fish scale pit based on the dry masonry stone retaining wall is provided for the present application.

[0033] Fig. 2 The overall top view structure diagram of the fish scale pit based on the dry masonry stone retaining wall is provided for the present application.

[0034] Fig. 3 The overall front view structure diagram of the fish scale pit based on the dry masonry stone retaining wall is provided for the present application.

[0035] Fig. 4 The slope ecological protection method flowchart of the water storage bin at the bottom of the fish scale pit based on the dry masonry stone retaining wall is provided for the present application.

[0036] In the figure: 1, anchor hole; 2, cement mortar; 3, steel anchor rod; 4, dry stone retaining wall; 5, double-layer wave-shaped retaining wall; 6, pearl cotton board; 7, nutrient soil; 8, bean stone layer; 9, bare slope surface; 10, plant; 11, concrete layer. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0038] Embodiment:

[0039] Referring to the drawings Figs. 1 to 4 As shown in the drawings, the slope ecological protection method based on dry stone retaining wall fish scale pit and bottom water storage bin comprises the bare slope surface 9, the dry stone retaining wall 4 and the steel anchor rod 3, and further comprises: the bare slope surface 9 is a to-be-treated slope, i.e. an original mountain, the steel anchor rod 3 is located inside the dry stone retaining wall 4 and anchored into the bare slope surface 9, playing an anchoring role, the steel anchor rod 3 and the dry stone retaining wall 4 are perpendicular to the ground and form a triangle with the bare slope surface 9, the double-layer wave-shaped retaining wall 5 made of HDPE material is arranged on the upper part of the dry stone retaining wall 4, the pearl cotton board 6 is arranged on the inner side of the dry stone retaining wall 4 and the double-layer wave-shaped retaining wall 5, the pearl cotton board 6, the nutrient soil 7 and the bean stone layer 8 are arranged in the triangle from bottom to top, the outer side of the dry stone retaining wall 4 and the double-layer wave-shaped retaining wall 5 is reinforced by spraying the concrete layer 11, and the plant 10 is planted in the nutrient soil 7.

[0040] Further, the anchor hole 1 is drilled on the slope surface of the bare slope surface 9 at an angle perpendicular to the ground, the steel anchor rod 3 is anchored by the cement mortar 2, the steel anchor rod 3 needs to be treated by anticorrosion and sprayed with anticorrosive paint, the dry stone retaining wall 4 is arranged on the slope surface of the bare slope surface 9, the dry stone retaining wall 4 arranges the steel anchor rod 3 inside the retaining wall, and the steel anchor rod 3 plays a role of structural reinforcement.

[0041] Further, the double-layer wave-shaped retaining wall 5 made of HDPE material is arranged on the upper part of the dry stone retaining wall 4, the height of the double-layer wave-shaped retaining wall 5 is the same as the exposed height of the steel anchor rod 3, and the pearl cotton board 6 is laid on the side close to the rock wall of the dry stone retaining wall 4 and the double-layer wave-shaped retaining wall 5 to serve as a heat insulation layer.

[0042] Further, the dry stone retaining wall 4 and the double-layer wave-shaped retaining wall 5 form a triangle with the bare slope surface 9, the pearl cotton board 6 is laid on the bottom of the triangle to serve as a water storage layer, the nutrient soil 7 is filled on the water storage layer for the growth of the plant 10, the bean stone layer 8 is laid on the upper layer of the nutrient soil 7 for water and soil conservation.

[0043] Further, the single fish scale pit device is provided with at least three steel anchor rods 3, respectively located at both ends and the middle, and the dry masonry stone retaining wall 4 and the double-layer wave-shaped retaining wall 5 are reinforced by spraying concrete layers 11C25 outside, and the plants 10 are selected from strong resistance trees and local adapted shrubs.

[0044] Compared with the prior art, the fish scale pit device has the following advantages:

[0045] 1. Structural combination innovation

[0046] The dry masonry stone retaining wall 4 and the steel anchor rod 3 are combined and anchored: the steel anchor rod 3 is vertically anchored into the slope, and the dry masonry stone retaining wall 4 wraps it to form a triangular structure, which not only reduces the cost by using on-site block stones, but also enhances the overall anchoring force by the steel anchor rod 3, and compared with the traditional dry masonry stone structure, the anti-sliding stability is improved.

[0047] The superimposed protection of the HDPE double-layer wave-shaped retaining wall 5: The double-layer wave-shaped structure of HDPE material is added to the upper part of the dry masonry stone retaining wall 4, the wave-shaped design increases the water flow resistance, reduces the direct erosion of rainwater on the pit body, and at the same time, the HDPE material has strong weather resistance, which makes up for the deficiency of the dry masonry stone in the anti-weathering performance.

[0048] The layered structure of the triangular space: the dry masonry stone retaining wall 4, the double-layer wave-shaped retaining wall 5 and the exposed slope surface form a triangular area, and inside, from bottom to top, are sequentially arranged the pearl cotton board 6 water storage layer, the nutrient soil 7 and the bean stone layer 8. This layered design realizes the functional zoning of "water storage-plant 10 growth-water and soil conservation", breaking through the limitation of traditional fish scale pit single soil storage.

[0049] 2. Functional integration innovation

[0050] The cooperation of the bottom water storage and the pearl cotton board 6: the pearl cotton board 6 at the bottom of the triangle as a water storage layer, uses its porous structure to absorb and store rainwater, cooperates with the water retention effect of the upper nutrient soil 7 and bean stone layer 8, forms a "short-term water storage-long-term release" water supply mechanism, solves the problem of insufficient water storage capacity of traditional fish scale pit, especially suitable for arid areas.

[0051] Integration of heat insulation and thermal insulation functions: the pearl cotton board 6 laid inside the dry masonry stone retaining wall 4 and the double-layer wave-shaped retaining wall 5 simultaneously acts as a heat insulation layer, which can adjust the temperature in the pit, reduce the damage of extreme temperature to the root system of the plants 10, create a suitable environment for the growth of vegetation, and improve the survival rate of vegetation.

[0052] 3. Construction and material innovation

[0053] Efficient use of on-site resources: the dry masonry stone retaining wall 4 directly uses on-site block stones, reducing the cost of material transportation, and avoiding the high energy consumption problem of traditional concrete pouring, which meets the environmental protection concept of ecological restoration.

[0054] C25 concrete layer 11 outside reinforcement: C25 concrete layer 11 is sprayed outside the dry masonry stone retaining wall 4 and the double-layer wave-shaped retaining wall 5, forming a rigid protective layer, enhancing the erosion resistance and weathering resistance of the structure, prolonging the service life of the protection facility, and significantly improving the durability compared with traditional vegetation slope protection technology.

[0055] Plant 10 selection and configuration innovation: Selecting strong anti-stress trees and native adapted shrubs, combined with the configuration mode of "1 tree + 2 shrubs" in each fish-scale pit device, a multi-level vegetation system is formed, which not only improves the ecological stability of the slope, but also further enhances the overall protection effect through the soil fixation of plant 10 root system.

[0056] 4. Layout and function innovation

[0057] Quincunx layout of runoff dispersion design: The fish-scale pits are arranged in a quincunx pattern on the slope surface. This layout makes the runoff flow dispersed on the slope surface, reducing the water flow impact force of a single area. Compared with traditional linear arrangement, it can reduce the overall erosion risk of the slope and improve the erosion resistance of the slope.

[0058] Low cost and low maintenance advantage: Through the water storage and water retention function of the water storage tank and the pearl cotton board 6, the frequency of artificial irrigation is reduced; the composite structure of dry masonry and concrete layer 11 reduces the risk of pit body damage and reduces the maintenance cost in the later period. Compared with traditional slope greening technology, the maintenance cost is significantly reduced, and the survival rate of vegetation is improved.

[0059] The slope ecological protection method based on the dry masonry retaining wall fish-scale pit bottom water storage tank comprises the following steps:

[0060] Step one, slope pretreatment: remove dangerous rocks, and control the flatness to within ±10 cm;

[0061] Step two, anchor rod construction: drill a hole with a diameter of ≥25 mm and a depth of ≥0.5 m, and inject grout at a pressure of 0.3-0.5 MPa;

[0062] Step three, retaining wall masonry: dry masonry staggered masonry, HDPE retaining wall connected with steel anchor rod 3 through bolts;

[0063] Step four, function layer laying: the overlap width of the pearl cotton board 6 is ≥100 mm, and water retaining agent is added to the nutrient soil;

[0064] Step five, concrete layer 11 spraying: using wet spraying process, completed in 1-2 times;

[0065] Step six, vegetation planting: select anti-stress trees and native shrubs, and arrange in a quincunx pattern.

[0066] Further, the grouting material of the steel anchor rod 3 is M20-M25 cement mortar mixed with 3%-5% of expanding agent, and the curing period is ≥7 days. When the double-layer wave-shaped enclosure 5 is installed, the bottom is connected with the dry masonry enclosure 4 through L50*5 angle steel, and the bolt spacing is ≤500 mm.

[0067] Further, the improved nutrient soil 7 is added with biochar and compound fertilizer. The biochar is added in an amount of 10%-15% of the soil volume, and the compound fertilizer is used in an amount of 400-600 g / m 2 After the plants 10 are planted, the grass mat is used for covering and moisture retention, and the soil water content is maintained at ≥15% during the curing period.

[0068] Construction method:

[0069] The exposed slope 9 is subjected to risk removal operation, and unstable dangerous rocks and loose block stones on the slope are removed. According to the arrangement distance of 2.5 m and the interval of 3 m, the device width of 1.2 m is used for line laying to determine the position of each device on the slope.

[0070] The steel anchor rod 3 adopts HRB400 steel with a diameter of 20 mm. The anchor hole 1 is drilled in the vertical direction of the ground on the exposed slope 9, and the hole diameter is not less than Φ25 mm and the depth is 0.3 m. The steel anchor rod 3 is cement mortar 2 anchored, the steel anchor rod 3 is embedded in the rock by 0.3 m, and the exposed length is 1.2 m. The steel anchor rod 3 needs to be subjected to corrosion prevention treatment in advance, such as spraying anticorrosive paint and the like.

[0071] The dry masonry enclosure 4 is dry-masonryed with on-site block stones, and the dry-masonry height can be determined according to the number of block stones. The double-layer wave-shaped enclosure 5 made of HDPE material is arranged on the upper part of the dry masonry enclosure 4, so that the total height of the device reaches 1.2 m. The dry masonry enclosure 4 and the double-layer wave-shaped enclosure 5 are framed by the steel anchor rod 3.

[0072] The pearl cotton board 6 has a thickness of 5 cm and is used for water storage, heat preservation and thermal insulation.

[0073] The nutrient soil 7 is a soil with moderate acidity and alkalinity, good drainage, loose and fertile, and no toxic substances, and the soil is added with a nutrient agent.

[0074] The bean stone layer 8 has a particle size of 4-8 mm.

[0075] The plants 10 are strong-anti-stress tree seedlings and local adapted shrubs.

[0076] The concrete layer 11 is of C25 specification.

[0077] In the embodiment, three steel bars are arranged in each fish scale pit device, which are respectively located at both ends and the middle. The device has a total length of 1.2 m, a width of 1 m, and a height of 1.2 m. One tree and two shrubs are planted in each device.

[0078] It is to be understood that the terminology "including", "comprising", or other derivatives from the term "contain" are inclusive and that, in addition to the stated combinations, other combinations are also contemplated. It is to be further understood that the term "comprising" or "comprises" does not exclude other elements being present in addition to those listed. It is to be further understood that the term "including" or "includes" does not exclude other elements being present in addition to those listed.

[0079] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since the scope of the application is defined with respect to the appended claims.

Claims

1. A fish scale pit based on dry stone masonry enclosure, comprising a steel anchor rod (3) and a dry stone masonry enclosure (4) arranged on an exposed slope surface (9), characterized in that: Also includes: The exposed slope surface (9) is a slope to be treated, i.e., the original mountain. The steel anchor rod (3) is located inside the dry stone enclosure (4) and anchored into the exposed slope surface (9) to play an anchoring role. The steel anchor rod (3) and the dry stone enclosure (4) are both perpendicular to the ground and form a triangle with the exposed slope surface (9). The upper part of the dry stone enclosure (4) is provided with a double-layer corrugated enclosure (5) made of HDPE material. The inner sides of the dry stone enclosure (4) and the double-layer corrugated enclosure (5) are provided with pearl cotton boards (6). The triangle is provided with pearl cotton boards (6), nutrient soil (7), and pea stone layers (8) from the bottom upward. The outer sides of the dry stone enclosure (4) and the double-layer corrugated enclosure (5) are sprayed with a concrete layer (11) for reinforcement. Plants (10) are planted in the nutrient soil (7).

2. The fish scale pit based on dry stone masonry according to claim 1, characterized in that: Anchor holes (1) are drilled on the exposed slope surface (9) at an angle perpendicular to the ground, and the steel anchor rods (3) are anchored with cement mortar (2). The steel anchor rods (3) need to be treated with anti-corrosion and sprayed with anti-corrosion paint. A dry stone enclosure (4) is built on the exposed slope surface (9). The dry stone enclosure (4) dry-builds the steel anchor rods (3) inside the enclosure, and the steel anchor rods (3) serve as structural reinforcement.

3. The fish scale pit based on dry stone masonry according to claim 2, characterized in that: A double-layer corrugated enclosure (5) made of HDPE is provided on the upper part of the dry stone enclosure (4); the height of the double-layer corrugated enclosure (5) is the same as the exposed height of the steel anchor rod (3); and pearl cotton boards (6) are laid on the side of the dry stone enclosure (4) and the double-layer corrugated enclosure (5) close to the rock wall to serve as a heat insulation layer.

4. The fish scale pit based on dry stone masonry according to claim 3, characterized in that: The dry stone enclosure (4) and the double-layer wavy enclosure (5) form a triangle with the exposed slope surface (9), and the bottom of the triangle is paved with pearl cotton board (6) to serve as a water storage layer.

5. The fish scale pit enclosure based on dry stone masonry according to claim 4 is characterized in that: The nutrient soil (7) is filled on the water storage layer for the growth of plants (10), and a pea stone layer (8) is laid on the upper layer of the nutrient soil (7) for soil and water conservation.

6. The fish scale pit based on dry stone masonry according to claim 5, characterized in that: A single fish scale pit device is provided with at least three of the steel anchor rods (3), which are respectively located at both ends and in the middle. The dry stone enclosure (4) and the double-layer wavy enclosure (5) are reinforced by spraying a concrete layer (11) C25 on the outside.

7. The fish scale pit enclosure based on dry stone masonry according to claim 1 is characterized in that: The plants (10) are selected from trees with strong stress resistance and shrubs suitable for local growth.

8. A slope ecological protection method based on a dry stone enclosure and a water storage tank at the bottom of a fish scale pit according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Slope pretreatment: remove dangerous rocks and control the flatness within ±10cm; Step 2: Anchor bolt construction: drilling diameter ≥ 25mm, depth ≥ 0.5m, grouting pressure 0.3-0.5MPa; Step 3: Enclosure construction: dry stone masonry with staggered joints, HDPE enclosure is connected to steel anchor rods (3) by bolts; Step 4: Laying the functional layer: the overlap width of the pearl cotton board (6) is ≥100mm, and the nutrient soil is added with a water-retaining agent; Step 5: Concrete layer spraying: adopt wet spraying process, completed in 1-2 times; Step 6. Vegetation Planting: Select stress-resistant trees and native shrubs and arrange them in a plum blossom shape.

9. The slope ecological protection method based on dry stone masonry enclosure and water storage at the bottom of the fish scale pit according to claim 8, characterized in that: The grouting material of the steel anchor rod (3) is M20-M25 cement mortar, mixed with 3%-5% expansion agent, and the curing period is ≥7 days. When the double-layer wave-shaped enclosure (5) is installed, the bottom is connected to the dry stone enclosure (4) through L50×5 angle steel, and the bolt spacing is ≤500mm.

10. The slope ecological protection method based on dry stone enclosure and water storage at the bottom of fish scale pit according to claim 8, characterized in that: Biochar and compound fertilizer are added to the improved nutrient soil (7), with the amount of biochar added being 10%-15% of the soil volume and the amount of compound fertilizer being 400-600g / m 2 After the vegetation (10) is planted, it is covered with straw mats to keep it moist, and the soil moisture content is maintained at ≥15% during the maintenance period.

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