CN113529754B - Granular-body slope ecological slope protection structure and construction method - Google Patents

Abstract

The invention discloses an ecological slope protection structure of a granular body side slope and a construction method, wherein the ecological slope protection structure comprises a planting soil layer arranged on a granular body slope surface, an isolation layer is arranged between the planting soil layer and the granular body slope surface, a plurality of water diversion piles are inserted into the granular body slope surface, the isolation layer and the planting soil layer, and a water diversion sheet used for communicating the water diversion piles is arranged on the surface of the planting soil layer; the invention can build a good growing environment for the granular body side slope, and can restore the vegetation ecosystem of the slope surface while protecting the slope and controlling the soil erosion.

Description

Ecological Slope Protection Structure and Construction Method of Particulate Slope

technical field

The invention relates to the technical field of ecological slope protection and ecological restoration, in particular to an ecological slope protection structure and construction method of a granular side slope.

Background technique

As a special kind of geotechnical material, granular body widely exists in mine tailings reservoir, coal gangue dump, quarry, and various excavation engineering waste slag yards. Its basic characteristics are that the structure is loose, the particles are large, and there is almost no connection between fine-grained substances and other cements between the particles, and it is completely a plate of "loose sand". Particulates are often huge in size, forming a large area of slope, and accumulating at the natural repose angle as the slope angle. Due to poor cementation and poor integrity, local deformation and instability are easy to occur in case of earthquakes or trampled by humans and animals. Moreover, due to the lack of fine-grained soil particles, the naturally settled dust is easily lost by rainwater leaching, and the surface of the slope formed by granular bodies is often unable to Natural restoration of vegetation.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the above-mentioned deficiencies, and to provide a granular body slope ecological slope protection structure and construction method, which can create a good growth environment for the granular body slope, and restore slope vegetation while protecting the slope and controlling soil erosion. ecosystem.

In order to solve the above-mentioned technical problems, the technical scheme adopted in the present invention is: an ecological slope protection structure for a granular body slope, comprising a planting soil layer arranged on the granular body slope surface, the planting soil layer and the granular body slope An isolation layer is arranged between the surfaces, a plurality of water diversion piles are inserted in the granular body slope, the isolation layer and the planting soil layer, and a diversion piece for connecting the water diversion piles is arranged on the surface of the planting soil layer.

Further, the planting soil layer includes a seed-free base layer and a seed-containing surface layer.

Preferably, the components in the base layer are respectively 90-95 parts by volume of loam, 5-10 parts of grass fiber, 0.08-0.1 part of water retention agent, and 0.6-0.8 part of compound fertilizer; Each component is calculated according to volume: 91-94 parts of loam, 6-9 parts of grass fiber, 0.08-0.1 part of water retention agent, 0.4-0.6 part of compound fertilizer, and 290-310 g/m ³ of plant seeds; The grass fiber is processed from straw or wheat straw, and the length is 0.5-2cm.

Preferably, the components in the base layer are respectively: 0.08-0.12% of the water-retaining agent, 0.7-0.9% of the compound fertilizer, and the others are loam soil; the components in the surface layer are: Water retention agent 0.08-0.1%, compound fertilizer 0.5-0.7%, others are loam soil, and plant seeds are 280-300 g/m ³ .

Preferably, the components in the isolation layer are respectively 8-10 parts by volume of grass fiber, 60-80 parts of clay, 10-15 parts of cement, and the length of the grass fiber is 2-4 cm.

Preferably, the components in the isolation layer are respectively 10-20 parts by volume of grass fiber, 80-90 parts of clay, and the length of the grass fiber is 2-4 cm.

Further, the water diversion pile is a cylindrical structure made of bamboo pile material, the diversion piece is an arc-shaped bamboo piece structure, the diversion piece is inserted in the through hole of the side part of the water diversion pile, and a plurality of water diversion piles and the diversion piece are combined. form a network structure.

Further, grid-like fences or grass cages or geocells or three-dimensional nets are buried in the planting soil layer to fix the soil to prevent the soil from sliding down and landslides.

Further, a straw curtain or straw blanket is also arranged between the isolation layer and the granular body slope, and the straw curtain or straw blanket is woven from straw or wheat straw.

In addition, the present invention also discloses the construction method of the above-mentioned granular body slope ecological slope protection structure, which comprises the following steps:

Step 1): Reshape the original pile slope, and use mechanical and manual methods to clear the slope and backfill it; implement graded grading for tall and large slopes, and leave slope top roads and multi-level horse tracks;

Step 2): While laying straw curtains or grass blankets on the granular body slope, drill holes to install water diversion piles, and the water diversion piles are inserted into the granular body slope surface at a certain distance, and the straw curtains or grass blankets are fixed by the water diversion piles;

Step 3): Dump down the material of the mixed isolation layer on the road at the top of the slope or on the horse track with a rear unloading vehicle, and level it mechanically or manually to form the isolation layer;

Step 4): Form a grid-like fence by tying wires between the water diversion piles, or laying multiple grass cages or laying geocells or laying three-dimensional nets on the slope of the granular body next to the slope; grass cages or geogrids The chamber or three-dimensional net is fixed with bamboo stakes or short bolts;

Step 5): Prepare and mix the materials for the planting soil layer according to the proportion, and lay them on the slope of the granular body, first lay the base layer, and then lay the surface layer;

Step 6): Connect the diversion piece and the diversion pile to each other;

Step 7): Cover the surface layer with a layer of non-woven fabric, remove the non-woven fabric after the grass seeds germinate, and regularly sprinkle water for maintenance on sunny days to complete the construction.

Beneficial effects of the present invention:

(1) Laying straw curtains or grass blankets between the granular body slope and the isolation layer can reduce the scouring of clay from the granular body gaps, which is conducive to the maintenance of soil and water in the planting layer; thereby reducing the cost and making the granular body storage yard feasible. Sustainable ecological restoration and establishment of a stable slope ecosystem.

(2) When cement is used for the isolation layer, because the cement has good adhesion, it is more stable when mixed with clay and covered on the slope. Mixing with grass fiber can also increase the integrity and erosion resistance of the isolation layer. It can play a good isolation effect in the early stage; in the later stage, under the action of leaching and the secretion of acidic substances by plant roots, it can reduce the alkalinity of the isolation layer, and with the continuous joint action of soil microorganisms and roots, the soil structure and acidity and alkalinity can be gradually improved. Plant roots can also penetrate into it, and even grow into granules; at this time, the planting soil layer and the isolation layer are densely covered with plant roots, which have good integrity, and together with the plants, form a large flexible blanket It covers the granular slope surface, which improves the ability of the granular body slope to resist vibration and other damage; when the isolation layer does not use cement, the roots of the plants can quickly grow into the soil, and the rapid re-greening of the slope can be achieved. This barrier formula is suitable for places with less rainfall.

(3) The use of water diversion piles can not only play a fixed role, but also can introduce the water flow on the slope into the granular body on the spot, and through the cooperation of the diversion sheet and the water diversion pile, it can prevent the concentrated water flow on the slope from causing the soil on the slope. Gutter erosion. This design makes full use of the stability of the granular body slope itself, which has great permeability and is conducive to drainage, and can greatly reduce the cost of soil and water conservation on the slope.

(4) Grid-shaped fences, grass cages, geocells, and three-dimensional nets can effectively prevent the soil from sliding down, achieve the purpose of soil consolidation, and effectively prevent landslides.

(5) The present invention can provide various solutions to deal with different climate and slope conditions. Most of the materials used are ecological materials, which can provide good conditions for plant growth, and at the same time play the role of soil and water conservation, ecological restoration and stable slope protection.

Description of drawings

Figure 1 is a schematic cross-sectional view of the ecological slope protection structure of the granular slope when the grid-shaped fence is used;

Figure 2 is a schematic cross-sectional view of the ecological slope protection structure of the granular body slope when using grass cages;

Figure 3 is a schematic cross-sectional view of the ecological slope protection structure of the granular body slope during the excavation of the earth cell;

Figure 4 is a schematic cross-sectional view of the ecological slope protection structure of the granular body slope when a three-dimensional network is adopted;

Figure 5 is a schematic plan view of the seepage and drainage structure of the water diversion pile and the diversion sheet;

Fig. 6 is a partial three-dimensional schematic diagram of the seepage and drainage structure of the water diversion pile and the diversion sheet;

FIG. 7 is a schematic diagram of the relationship between the grid-shaped fence and the water diversion pile viewed from the perspective of the A direction in FIG. 1 according to the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figures 1 to 6, an ecological slope protection structure for a granular body slope includes a planting soil layer 2 arranged on the granular body slope surface 1, and between the planting soil layer 2 and the granular body slope surface 1 There is an isolation layer 3, the granular body slope 1, the isolation layer 3 and the planting soil layer 2 are inserted with a plurality of water diversion piles 4, and the surface of the planting soil layer 2 is provided with a diversion piece 5 for connecting each water diversion pile 4. .

Further, the planting soil layer 2 includes a seed-free base layer 2.1 and a seed-containing surface layer 2.2.

Preferably, the components in the base layer 2.1 are respectively 90-95 parts by volume of loam, 5-10 parts of grass fiber, 0.08-0.1 part of water retention agent, and 0.6-0.8 part of compound fertilizer; the surface layer 2.2 The components in 2.2 are: 91-94 parts of loam, 6-9 parts of grass fiber, 0.08-0.1 part of water retention agent, 0.4-0.6 part of compound fertilizer, and 290-310 g/ ^m3 of plant seeds. ; The grass fiber is processed from straw or wheat straw, and the length is 0.5-2cm.

Preferably, the components in the base layer 2.1 are respectively: 0.08-0.12% of the water-retaining agent, 0.7-0.9% of the compound fertilizer, and the others are loam soil; the components in the surface layer 2.2 are respectively calculated by volume percentage It is: water retention agent 0.08-0.1%, compound fertilizer 0.5-0.7%, others are loam soil, and plant seeds are 280-300 g/m ³ .

Preferably, the components in the isolation layer 3 are respectively 8-10 parts by volume of grass fiber, 60-80 parts of clay, 10-15 parts of cement, and the length of the grass fiber is 2-4 cm.

Preferably, the components in the isolation layer 3 are respectively 10-20 parts by volume of grass fiber, 80-90 parts of clay, and the length of the grass fiber is 2-4 cm.

Further, the water diversion pile 4 is a cylindrical structure made of bamboo pile material, the diversion piece 5 is an arc-shaped bamboo piece structure, and the diversion piece 5 is inserted into the through hole 4.1 on the side of the water diversion pile 4, and a plurality of water diversion pieces 5. The pile 4 and the drainage sheet 5 are combined to form a network structure. In the present embodiment, the size of the selected bamboo pile for the water diversion pile 4 is: the outer diameter is 8-12cm, the inner diameter is 6-10cm, and the height is 50-80cm; the drainage sheet 5 is a bamboo with a diameter of 8-12cm It is two bamboo pieces for intercepting water; in addition, the bamboo stakes and the bamboo pieces are all pre-removed, and through holes 4.1 are drilled at the connection with each other, so that the water can flow into the bamboo stakes through the bamboo pieces.

Further, a grid-shaped fence 6 or a grass cage 7 or a geocell 8 or a three-dimensional net 9 is also embedded in the planting soil layer 2 to fix the soil to prevent the soil from sliding down and landslides. In this embodiment, as shown in FIGS. 1 and 7 , several horizontal bars are tied with wires, and the horizontal bars and vertical branches form a grid-like fence 6 ; as shown in FIG. 2 , in the planting soil layer 2 Buried with grass cages 7, a plurality of grass cages 7 are laid close to the granular body slope 1; as shown in Figures 3 and 4, a geocell 8 or a three-dimensional net 9 is buried in the planting soil layer; as shown in Figure 3 As shown, when the geocell 8 is used, the thickness of the planting soil layer 2 is equal to the depth of the geocell 8; as shown in FIG.

Further, a straw curtain or a straw blanket is also arranged between the isolation layer 3 and the granular body slope 1, and the straw curtain or grass blanket is woven from straw or wheat straw.

In addition, the present invention also discloses the construction method of the above-mentioned granular body slope ecological slope protection structure, which comprises the following steps:

Step 1): Reshape the original pile slope, and use mechanical and manual methods to clear the slope and backfill it; implement graded grading for tall and large slopes, and leave slope top roads and multi-level horse tracks;

Step 2): While laying grass curtains or grass blankets on the granular body slope 1, drill holes to install water diversion piles 4. The water diversion piles 4 are inserted into the granular body slope 1 at a certain distance, and the straw curtains are fixed by the water diversion piles 4. or grass carpet;

Step 3): Dump down the material of the mixed isolation layer 3 on the road at the top of the slope or on the horse track with a rear unloading vehicle, and level it mechanically or manually to form the isolation layer 3;

Step 4): forming a grid-like fence 6 by tying wires between the water diversion piles 4, or laying a plurality of grass cages 7 on the granular body slope 1 close to the slope, or laying a geocell 8 or laying a three-dimensional mesh 9 ; The grass cage 7 or the geocell 8 or the three-dimensional net 9 is fixed with bamboo stakes or short bolts;

Step 5): Prepare and mix the materials of the planting soil layer 2 according to the proportion, and lay them on the granular body slope 1, first lay the base layer 2.1, and then lay the surface layer 2.2;

Step 6): connect the diversion piece 5 and the diversion pile 4 to each other;

Step 7): Cover the surface layer 2.2 with a layer of non-woven fabric, remove the non-woven fabric after the grass seeds germinate, and regularly sprinkle water for maintenance on sunny days to complete the construction.

Describe in detail below with three specific embodiments;

Example 1

The slope of a gravel yard in a certain place in the south has a slope of 32°, and the grid-like fence structure of the present invention is planned to be used for ecological slope protection.

There is a straw curtain between the isolation layer and the granular body slope, and the material of the straw curtain is made of straw.

The material composition of the isolation layer is (volume ratio): grass fiber (8%), clay (80%) and cement (12%) are mixed; the grass fiber length is 2-4cm, and the thickness of the isolation layer is 3cm.

The water diversion piles on the same layered surface are bound with a number of horizontal crossbars, and the horizontal crossbars and the vertical branches form a grid-like fence; the horizontal crossbars are 1-2m in length and 4-8cm in width Bamboo slices, vertical branches are willow live branches.

The water diversion pile adopts a bamboo tube with an outer diameter of 8cm, an inner diameter of 6cm and a height of 50cm.

The drainage piece is a bamboo piece obtained by vertically dividing a bamboo with a diameter of 8cm into two.

The base layer formula is (volume ratio): loam 90%, grass fiber 10%, water retention agent 0.08%, compound fertilizer 0.6%, and the surface layer formula is (volume ratio): loam 91%, grass fiber 9%, water retention agent 0.08 %, compound fertilizer 0.4%, plant seeds 290g/m ³ ; the thickness of the base layer is 7cm, and the thickness of the surface layer is 1cm; the grass fiber is processed from straw or wheat straw, and the length is 0.5-2cm.

The test slope adopts the following construction steps to carry out vegetation restoration and ecological slope protection for the yard.

(1) Reshape the original pile slope, and use mechanical and manual methods to clear and backfill the slope; implement graded grading for tall and large side slopes, and leave slope top roads and multi-level horse tracks;

(2) While laying straw curtains or grass blankets on the granular body slope, drill holes and install water diversion piles. The depth of the water diversion piles inserted into the granular body slope surface is 8cm, the horizontal spacing of water diversion piles is 1m, and the layer height is 1m , and the straw curtain or straw blanket is fixed by the water diversion pile;

(3) On the slope top road or horse track, use the rear unloading vehicle to dump the mixed isolation layer material down, and use it to level it mechanically or manually;

(4) Bind the grid-like fence by tying wire between the water diversion piles;

(5) Dump down the mixed planting soil material on the road or horse road at the top of the slope, construct the base layer first, then construct the surface layer, and level it manually or mechanically, so that the planting soil layer is evenly covered between the grid-like fences 's slope.

(6) Fix one end of the drainage sheet with a wire tie, and insert the other end into a water diversion pile with a through hole;

(7) Cover the surface layer with a layer of non-woven fabric, remove the non-woven fabric after the grass seeds germinate, and regularly sprinkle water for maintenance on sunny days to complete the construction.

Example 2

The slope of a gravel yard in a certain place in the north has a slope of 34°, and the grass cage structure of the present invention is planned to be used for ecological slope protection.

The material composition of the isolation layer is (volume ratio): grass fiber (10%), clay (90%); the grass fiber length is 2-4cm, and the thickness of the isolation layer is 5cm.

In the straw cage, the core holds the middle part of multiple thorns, and the two ends of the thorns extend in all directions to form a fluffy cylindrical grass cage. The core is made of straw rope, and the thorns are made of dry straw, with a length of 12 cm. .

The core is bound on the fixed net with tie wire; the fixed net adopts 10# galvanized diamond wire mesh with 6cm mesh, and is bound on the water diversion pile with tie wire, so that the wire mesh is 7cm away from the slope of the granular body.

The base layer includes loam, grass fiber, compound fertilizer and water retention agent, and the formula is (volume ratio): loam 95%, grass fiber 5%, water retention agent 0.09%, compound fertilizer 0.7%; surface layer 5 includes loam, grass fiber, compound fertilizer , water-retaining agent and plant seeds, the formula is (volume ratio): loam soil 94%, grass fiber 6%, water-retaining agent 0.09%, compound fertilizer 0.8%, plant seeds 310 g/m ³ ; the thickness of the base layer is 10cm, the thickness of the surface layer 2cm; the grass fiber is processed from straw, and the length is 0.5-2cm.

The water diversion piles are made of bamboo tubes with an outer diameter of 10cm, an inner diameter of 8cm and a height of 60cm.

The drainage sheet is a bamboo sheet obtained by vertically dividing a bamboo with a diameter of 10 cm into two.

The test slope adopts the following construction steps to carry out vegetation restoration and ecological slope protection for the yard.

(1) Reshape the original pile slope, and use mechanical and manual methods to clear and backfill the slope; implement graded grading for tall and large side slopes, and leave slope top roads and multi-level horse tracks;

(2) On the slope top road or horse track, use the rear dump truck to dump the mixed isolation layer material down, and use it to level it mechanically or manually;

(3) While laying the fixed net on the isolation layer, the water diversion piles are drilled and installed. The depth of the water diversion piles inserted into the granular body slope is 7cm, the horizontal spacing of the diversion piles is 1.2m, and the layer height is 1.2m. Pile fixed fixed net;

(4) Lay a number of grass cages on the slope of the granular body next to the slope, and each grass cage is fixed by a fixed net;

(5) Prepare and mix the planting soil layer materials according to the proportion, and spray the base material on the slope of the granular body with a wet sprayer, spray the base layer first, and then spray the surface layer;

(6) Fix one end of the drainage sheet with a wire tie, and insert the other end into a water diversion pile with a through hole;

(7) Cover the surface layer with a layer of non-woven fabric, remove the non-woven fabric after the grass seeds germinate, and regularly sprinkle water for maintenance on sunny days to complete the construction.

Example 3

The slope of a coal gangue yard in a certain place in the south has a slope ratio of 1:1.5, and the geocell structure of the present invention is planned to be used for ecological slope protection.

There is a grass blanket between the isolation layer and the granular body slope, and the material of the grass blanket is woven from straw.

The material composition of the isolation layer is (volume ratio): grass fiber (10%), clay (80%) and cement (10%) are mixed; the grass fiber length is 2-4cm, and the thickness of the isolation layer is 4cm.

The geocell is buried in the planting soil layer, and the thickness of the planting soil layer is equal to the depth of the geocell.

Geocell model is TGLG-PE-100-450.

The base layer formula is (volume ratio): loam soil 93%, grass fiber 7%, water retention agent 0.1%, compound fertilizer 0.8%; the surface layer formula is (volume ratio): loam soil 94%, grass fiber 6%, water retention agent 0.09% %, compound fertilizer 0.6%, plant seeds 300g/m ³ ; the thickness of the base layer is 9cm, and the thickness of the surface layer is 1cm; the grass fiber is processed from straw or wheat straw, and the length is 0.5-2cm.

The dimensions of the water diversion pile are: a bamboo tube with an outer diameter of 12cm, an inner diameter of 10cm and a height of 80cm.

The drainage piece is a bamboo piece obtained by vertically dividing a bamboo with a diameter of 12cm into two.

The test slope adopts the following construction steps to restore vegetation and ecological protection of the yard.

(1) Reshape the original pile slope, and use mechanical and manual methods to clear and backfill the slope; implement graded grading for tall and large side slopes, and leave slope top roads and multi-level horse tracks;

(2) While laying grass curtains or grass blankets on the granular body slope, drill holes and install water diversion piles. The depth of the water diversion piles inserted into the granular body slope surface is 5cm, the horizontal spacing is 1.5m, and the layer height is 1.5m. The straw curtain or carpet is fixed by the diversion pile;

(3) On the slope top road or horse track, use the rear unloading vehicle to dump the mixed insulating layer material down, and use it to level it mechanically or manually.

(4) Lay geocells on the isolation layer, and fix the opened geocells by diversion piles and short anchors;

(5) Prepare and mix the planting soil layer materials according to the proportion, and spray the planting soil layer into the geocell by the method of wet spraying and seeding. cell depth;

(6) Fix one end of the drainage sheet with a wire tie, and insert the other end into a water diversion pile with a through hole;

(7) Cover the surface layer with a layer of non-woven fabric, remove the non-woven fabric after the grass seeds germinate, and regularly sprinkle water for maintenance on sunny days to complete the construction.

Example 4

The slope of a coal gangue yard in a certain place in the north has a slope ratio of 1:1.45, and the three-dimensional network structure of the present invention is planned to be used for ecological slope protection.

The material composition of the isolation layer is (volume ratio): grass fiber (20%), clay (80%); the length of the grass fiber is 2-4cm, and the thickness of the isolation layer is 5cm.

Three-dimensional nets are buried in the planting soil layer and fixed by water diversion piles.

The formula of the base layer is (volume ratio): water-retaining agent 0.08%, compound fertilizer 0.9%, and the others are loam; the components in the surface layer are respectively: water-retaining agent 0.08%, compound fertilizer 0.5%, other It is loam soil, in which the plant seeds are 280 g/m ³ .

The dimensions of the water diversion pile are: a bamboo tube with an outer diameter of 10cm, an inner diameter of 8cm and a height of 70cm.

The drainage piece is a bamboo piece obtained by dividing a bamboo with a diameter of 10cm into two.

The test slope adopts the following construction steps to restore vegetation and ecological protection of the yard.

(1) Reshape the original pile slope, and use mechanical and manual methods to clear and backfill the slope; implement graded grading for tall and large side slopes, and leave slope top roads and multi-level horse tracks;

(2) While laying straw curtains or grass blankets on the granular body slope, drill holes to install water diversion piles. The depth of the water diversion piles inserted into the granular body slope surface is 4cm, the horizontal spacing of the water diversion piles is 1.5m, and the layer height is 1.5m, the straw curtain or straw blanket is fixed by the water diversion pile;

(3) On the slope top road or horse track, use the rear unloading vehicle to dump the mixed isolation layer material down, and use it to level it mechanically or manually;

(4) Lay three-dimensional nets on the isolation layer, and fix the three-dimensional nets by water diversion piles;

(5) Prepare and mix the planting soil layer materials according to the proportions, spray the base material by the wet spraying process, and construct the base layer and the surface layer respectively;

(6) Fix one end of the drainage sheet with a wire tie, and insert the other end into a water diversion pile with a through hole;

(7) Cover the surface layer with a layer of non-woven fabric, remove the non-woven fabric after the grass seeds germinate, and regularly sprinkle water for maintenance on sunny days to complete the construction.

The above-mentioned embodiments are only the preferred technical solutions of the present invention, and should not be regarded as limitations of the present invention. The embodiments and features in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall take the technical solutions described in the claims, including the equivalent alternatives of the technical features in the technical solutions described in the claims, as the protection scope. That is, equivalent replacements and improvements within this scope are also within the protection scope of the present invention.

Claims (4)

1. A granular body slope ecological slope protection structure, comprising a planting soil layer (2) arranged on a granular body slope surface (1), characterized in that: the planting soil layer (2) and the granular body slope An isolation layer (3) is arranged between the surfaces (1), and a plurality of water diversion piles (4) are inserted into the granular body slope surface (1), the isolation layer (3) and the planting soil layer (2). The surface of the soil layer (2) is provided with diversion pieces (5) for communicating with the water diversion piles (4); the diversion piles (4) are cylindrical structures made of bamboo piles, and the diversion pieces (5) are arc-shaped Bamboo piece structure, the drainage piece (5) is inserted into the through hole (4.1) on the side of the water diversion pile (4), and a plurality of water diversion piles (4) and the drainage piece (5) are combined to form a network structure; the planting soil The layer (2) comprises a base layer (2.1) without seeds and a surface layer (2.2) with seeds; The components in the base layer (2.1) are: 90-95 parts of loam, 5-10 parts of grass fiber, 0.08-0.1 part of water retention agent, and 0.6-0.8 part of compound fertilizer; the surface layer ( 2.2) In terms of parts by volume, the components are: 91-94 parts of loam, 6-9 parts of grass fiber, 0.08-0.1 parts of water retention agent, 0.4-0.6 parts of compound fertilizer, and 290-310 g/m2 of plant seeds ³ ; the grass fiber is processed from straw or wheat straw, and the length is 0.5-2cm; or, the components in the base layer (2.1) are respectively: water-retaining agent 0.08-0.12%, compound fertilizer 0.7- 0.9%, the others are loam soil; the components in the surface layer (2.2) are respectively: water retention agent 0.08-0.1%, compound fertilizer 0.5-0.7%, and the others are loam soil, of which plant seeds are 280-300 g/m ³ ; The components in the isolation layer (3) are respectively 8-10 parts by volume of grass fiber, 60-80 parts of clay, 10-15 parts of cement, and the length of the grass fiber is 2-4 cm; or, The components in the isolation layer (3) are respectively 10-20 parts by volume of grass fiber, 80-90 parts of clay, and the length of the grass fiber is 2-4 cm. 2. The granular body slope ecological protection structure according to claim 1, characterized in that: a grid-shaped fence (6) or a grass cage (7) or a geogrid is also buried in the planting soil layer (2). A chamber (8) or a three-dimensional mesh (9) to fix the soil to prevent mud sliding and landslides. 3. The granular body slope ecological slope protection structure according to claim 1, characterized in that: a grass curtain or a grass blanket is further provided between the isolation layer (3) and the granular body slope surface (1), so The straw curtain or straw blanket is woven from straw or wheat straw. 4. a construction method of the granular body slope ecological slope protection structure described in any one of claim 1 to 3, is characterized in that: it comprises the steps: Step 1): Reshape the original pile slope, and use mechanical and manual methods to clear the slope and backfill it; implement graded grading for tall and large slopes, and leave slope top roads and multi-level horse tracks; Step 2): While laying straw curtains or grass blankets on the granular body slope (1), drill holes to install water diversion piles (4), and the water diversion piles (4) are inserted into the granular body slope surface (1) at certain intervals , the straw curtain or straw blanket is fixed by the water diversion pile (4); Step 3): On the slope top road or horse track, the material of the mixed isolation layer (3) is poured down with a rear dump truck, and the isolation layer (3) is formed by mechanically or manually leveling; Step 4): Between the water diversion piles (4), a grid-like fence (6) is formed by tying wires, or laying a plurality of grass cages (7) or laying geotextiles on the granular body slope (1) next to the slope. Cells (8) or laying three-dimensional nets (9); grass cages (7) or geocells (8) or three-dimensional nets (9) are fixed with bamboo stakes or short bolts; Step 5): Prepare and mix the materials of the planting soil layer (2) according to the proportion, and lay them on the granular body slope (1), first lay the base layer (2.1), and then lay the surface layer (2.2); Step 6): Connect the diversion piece (5) and the diversion pile (4) to each other; Step 7): Cover the surface layer (2.2) with a layer of non-woven fabric, remove the non-woven fabric after the grass seeds germinate, and sprinkle water regularly for maintenance on sunny days to complete the construction.

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