Ecological slope protection structure of loess slope and construction method

Abstract

The invention discloses an ecological slope protection structure of a loess slope and a construction method. The slope protection structure comprises a deep solidification layer, an iron gauze, a solidification soil layer, a reinforcement-moisturizing layer and a seed layer. The deep curing layer is formed by mixing a consolid curing agent water aqua C444 and loess; the iron gauze covers the surface of the deep curing layer and is anchored by reinforcing steel bars; the solidified soil layer is formed by mixing a consolid curing agent and loess; the reinforced-moisturizing layer is formed by mixing a consolid curing agent, humus, a water-retaining agent, an organic fertilizer, basalt fibers and loess; the seed layer is formed by mixing seeds, a soil stabilizer, an organic fertilizer, loess and water. The soil stability can be better enhanced through the soil solidification and grass planting ecological slope protection technology, soil erosion is reduced, rain wash is slowed down, and therefore the risk of loess slope surface damage is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of slope management, soil and water conservation and ecological restoration, and in particular to a loess slope ecological slope protection structure and a construction method. Background Art

[0002] Loess is widely distributed in the Loess Plateau region of my country, including Shaanxi, Gansu, Ningxia, Qinghai, Henan, Shanxi, Inner Mongolia and other provinces. Due to the unique loose and porous structure of loess, it has the characteristics of poor density, low strength, collapse when wet, and easy to be damaged. When it rains, water will penetrate into the soil, increase the soil saturation, and thus reduce the shear strength of the soil. In addition, rainfall will also wash and erode the soil, resulting in the denudation of the soil layer on the surface of the slope, further reducing the stability of the slope, and easily causing disasters such as slope collapse and mudslides, so it is necessary to protect and manage the slope.

[0003] Traditional engineering slope protection poses a great environmental threat and requires a large amount of cost investment, which is not conducive to ecological protection. Simple vegetation slope protection cannot effectively prevent the occurrence of slope disasters because it does not improve the slope soil. It needs to be improved and reinforced to meet actual needs. Physical reinforcement and chemical reinforcement are the two most widely used reinforcement methods. Among them, compared with other reinforcement methods, chemical reinforcement has the advantages of small footprint, low noise, low vibration, and small impact on the environment, so it has been widely used. However, the commonly used chemical reinforcement also has certain limitations. For example, the strength of lime-solidified loess is relatively low and its water resistance is poor; cement-solidified loess has high strength and good water resistance, but it has a large shrinkage ratio and is prone to cracking. Therefore, selecting suitable materials and effective use methods can provide better results for slope repair projects.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to provide an ecological slope protection structure and a construction method for loess slopes to solve the deficiencies of the above-mentioned technologies.

[0006] To solve the above technical problems, the technical solution provided by the present invention is: a loess slope ecological slope protection structure, including a slope body, the slope protection structure includes a deep solidification layer, a wire mesh, a solidified soil layer, a reinforcement-moisture retention layer, and a seed layer.

[0007] As an improvement, the deep solidification layer is formed by mixing the anti-sphing force curing agent water agent C444 with loess in a certain proportion, and is constructed in a coordinated manner by segmented grouting and spraying; The wire mesh is covered on the surface of the deep solidified layer, the top of the wire mesh is 60 mm to 70 mm away from the slope of the deep solidified layer, and the connection points of the wire mesh are anchored with steel bars; The solidified soil layer is formed by mixing an anti-sulphuric acid solidifying agent with loess; The reinforcement-moisturizing layer is made of a mixture of a certain proportion of an anti-suspension curing agent, humus (straw, sawdust, etc.), a water retaining agent, an organic fertilizer, basalt fiber and loess; The seed layer comprises seeds, soil solidifier, organic fertilizer, loess and water.

[0008] As an improvement, the Consolidation soil solidifier includes two materials: aqueous agent Consolid444 (abbreviated as C444) and powder Solidry (abbreviated as SD).

[0009] As an improvement, the parameter of the deep solidification layer anti-repellent curing agent aqueous agent C444 is 0.04% to 0.06% of the mass of loess.

[0010] As an improvement, the parameter of the anti-sphing force curing agent aqueous agent C444 in the solidified soil layer, reinforcement-moisturizing layer and seed layer is 0.06%, and the parameter range of the powder SD is 0.8% to 1.6%.

[0011] A loess slope ecological slope protection construction method comprises the following steps: S1, Slope inspection and cleaning: The debris on the slope, debris and floating stones within the construction range should be cleaned up, and the existing tunnels on the slope should be filled to ensure that the slope is relatively smooth along the section; S2, grouting deep solidification layer: drill oblique micro-holes (aperture 2cm, depth 30cm, spacing 50cm×50cm), inject 80% of the prepared Kangsholi curing agent water into the micro-holes by segmented grouting (pressure 0.5~1.2MPa), and adjust the grouting amount dynamically according to the soil porosity. Spray the remaining 20% ​​evenly on the slope surface. After grouting, cover with plastic film and maintain for 3 days; S3, hanging mesh on the slope: artificially hang galvanized wire mesh on the slope, with a specification of 1.8mm and a mesh size of 2.5cm×2.5cm, and fix it with ribbed steel bars with a diameter of 12mm and U-shaped steel nails, with a spacing of 1000mm between the U-shaped steel nails; S4, laying the solidified soil layer: pour the anti-sulphuric acid curing agent, loess and water into the spraying machine according to the proportion, mix them evenly to form mud; use the spraying machine to spray the mixed mud evenly on the slope surface, and construct it multiple times to reach a thickness of 8cm to 12cm; S5, Laying the reinforced and moisture - retaining layer: Laying the reinforced and moisture - retaining layer includes loess, water, anti - erosion hardening agent, humus (such as straw, sawdust, etc.), water - retaining agent, organic fertilizer, and basalt fiber. Pour the above materials into the spraying machine case in sequence and mix them evenly to form a slurry. Use the spraying machine to evenly spray the mixed slurry onto the slope surface, and carry out multiple constructions to reach a thickness of 4 cm - 6 cm. S6, Spraying the seed layer: The seed layer includes seeds, soil hardening agent, organic fertilizer, and a slurry formed by mixing loess and water. Before spraying, germinate the seeds, and spray and attach the mixture above the substrate layer to form a 2 - 3 cm thick seed layer. S7, Covering with non - woven fabric for maintenance: Cover the sprayed slope surface with non - woven fabric for 7 - 14 days of maintenance. S8, Completion acceptance of ecological slope protection: 3 - 6 months after step 3 is completed, wait for the grass seeds to grow into a vegetation layer, and conduct the completion acceptance of the ecological slope protection, including detecting the slope surface flatness, integrity, vegetation growth rate, and height.

[0012] As an improvement, the humus content in the reinforced and moisture - retaining layer is 3%, the water - retaining agent content is 0.1%, the organic fertilizer content is 0.2%, and the basalt fiber content is 0.4%.

[0013] As an improvement, the seeds selected for the seed layer are a mixture of grass seeds at 20 g / m², and the seeds are germinated before spraying. The organic fertilizer content is 0.2%.

[0014] As an improvement, when mixing the anti - erosion hardening agent, strictly calculate the dosage according to the measurement standard. Sprinkle the powder on the material pile in portions according to the calculated dosage and mix evenly. Mix the liquid agent and water in proportion and spray in two times. Spray 80% of the anti - erosion liquid agent for the first time. When spraying for the second time, combine the moisture content of the mixed material and the weather conditions, mix the water to be added and the remaining 20% of the liquid agent, and then spray them all.

[0015] The advantages of the present invention compared with the prior art are as follows: 1. The anti - erosion soil hardening agent selected in the present invention is an environmentally friendly hardening material. It includes two materials, aqueous agent Consolid444 (abbreviated as C444) and powder Solidry (abbreviated as SD). C444 is a semi - viscous liquid, which is composed of monomers, polymers, and a catalyst for accelerating penetration. It can destroy the water film adhering around soil particles, resulting in irreversible aggregation of fine particles, thereby improving the natural binding force of soil fine particles, and causing irreversible aggregation of powders by exchanging the electrochemical load on soil particles. SD is a dry inorganic chemical substance, which can prevent the treated loess from soaking water by closing capillaries, can better compact the soil sample, reduce pores, and greatly reduce the water absorption capacity of the solidified loess, thereby preventing the collapsibility behavior of loess.

[0016] 2. The ecological slope protection structure of the present invention is composed of multiple layers of solidified soil layers. The deep solidified layer and the solidified soil layer can greatly improve the strength of the slope soil and enhance the anti-seepage property of the soil mass, thereby achieving the purpose of eliminating collapsibility. The reinforcement-humidity preservation layer helps the growth of vegetation while enhancing the slope strength. After the vegetation in the seed layer grows, it can slow down soil erosion and protect the ecological environment for a long time.

[0017] 3. In the construction method of the present invention, each improved soil layer has different mixing ratios, characteristics and functions. By scientifically improving the loess and reasonably arranging the layers, an ecological protection structure with the best anti-erosion property and the optimal economy can be achieved. 4. The combined action of the surface vegetation and each solidified and improved soil layer of the present invention effectively reduces the direct scouring and infiltration of rainwater on the slope, enhances the rainwater erosion resistance of the slope, prevents the accumulation and infiltration of rainwater on the slope, and reduces the risk of slope instability caused by rainwater.

[0018] 5. The ecological slope protection structure adopted by the present invention is simple, with low construction difficulty, can save construction time and cost, and has a wide application range. Description of the Drawings

[0019] Figure 1 It is a schematic cross-sectional view of the ecological slope protection structure of the loess slope of the present invention.

[0020] Figure 2 It is a schematic layout view of the ecological slope protection wire mesh of the loess slope of the present invention.

[0021] As shown in the figure: 1. Slope body; 2. Deep solidified layer; 3. Wire mesh; 4. Solidified soil layer; 5. Reinforcement-humidity preservation layer; 6. Seed layer; 7. U-shaped steel nails; 8. Steel bars. Detailed Embodiment

[0022] The present invention will be further described in detail below with reference to the drawings.

[0023] An ecological slope protection structure for a loess slope includes a slope body 1. The slope protection structure includes a deep solidified layer 2, a wire mesh 3, a solidified soil layer 4, a reinforcement-humidity preservation layer 5, and a seed layer 6.

[0024] The deep solidified layer 2 is formed by mixing the anti-seepage and force-solidifying agent aqueous solution C444 with loess in a certain proportion, and the construction is carried out in a coordinated manner by using two methods of segmented grouting and spraying; The wire mesh 3 covers the surface of the deep solidified layer 2. The height of the top of the wire mesh 3 is 60 mm to 70 mm from the slope surface of the deep solidified layer 2, and the connection points of the wire mesh 3 are anchored with steel bars; The solidified soil layer 4 is formed by mixing the anti-seepage and force-solidifying agent with loess; The reinforcement-humidity preservation layer 5 is formed by mixing a certain proportion of anti-seepage and force-solidifying agent, humus (such as straw, sawdust, etc.), water retaining agent, organic fertilizer, basalt fiber and loess; The seed layer 6 is composed of a mixture of seeds, soil stabilizer, organic fertilizer, loess and water.

[0025] The anti-seepage and anti-erosion soil stabilizer includes two materials, namely, water-based Consolid444 (abbreviated as C444) and powder Solidry (abbreviated as SD).

[0026] The parameter of the water-based C444 of the anti-seepage and anti-erosion stabilizer in the deep solidification layer 2 is 0.04% - 0.06% of the mass of the loess.

[0027] The parameter of the water-based C444 of the anti-seepage and anti-erosion stabilizer in the solidified soil layer 4, the reinforced and moisturizing layer 5 and the seed layer 6 is 0.06%, and the parameter range of the powder SD is 0.8% - 1.6%.

[0028] A construction method for ecological slope protection of loess slopes includes the following steps: S1, Slope inspection and cleaning: Debris on the slope surface, debris, floating stones, etc. within the construction range should be cleaned, and the existing pits on the slope surface should be filled to ensure that the slope surface is relatively smooth along the section. S2, Pouring the deep solidification layer: Drill inclined micro-holes (hole diameter 2 cm, depth 30 cm, spacing 50 cm × 50 cm), inject 80% of the prepared water-based anti-seepage and anti-erosion stabilizer into the micro-holes by means of segmented grouting (pressure 0.5 - 1.2 MPa). The grouting volume is dynamically adjusted according to the soil porosity, and the remaining 20% is evenly sprayed on the slope surface. After grouting, cover with a plastic film for curing for 3 days. S3, Slope net hanging: Manually hang a galvanized iron wire mesh 3 on the slope, with a specification of 1.8 mm and a mesh size of 2.5 cm × 2.5 cm, and fix it with ribbed steel bars 8 with a diameter of 12 mm and U-shaped steel nails 7. The spacing of the U-shaped steel nails 7 is 1000 mm. S4, Laying the solidified soil layer: Pour the anti-seepage and anti-erosion stabilizer, loess and water into the spraying machine case in proportion, and mix evenly to form a slurry; use the spraying machine to evenly spray the mixed slurry on the slope surface, and construct multiple times to reach a thickness of 8 cm - 12 cm. S5, Laying the reinforced and moisturizing layer: Laying the reinforced and moisturizing layer 5 includes loess, water, anti-seepage and anti-erosion stabilizer, humus (such as straw, sawdust, etc.), water-retaining agent, organic fertilizer, basalt fiber. Pour the above materials into the spraying machine case in sequence and mix evenly to form a slurry; use the spraying machine to evenly spray the mixed slurry on the slope surface, and construct multiple times to reach a thickness of 4 cm - 6 cm. S6, Spraying the seed layer: The seed layer 6 is formed by mixing seeds, soil stabilizer, organic fertilizer, loess and water to form a slurry. Before spraying, the seeds are germinated, and the mixture is sprayed and attached above the substrate layer to form a 2 - 3 cm thick seed layer. S7, Cover with non-woven fabric for maintenance: Cover the sprayed slope with non-woven fabric for 7 - 14 days for maintenance; S8, Ecological slope protection acceptance: 3 - 6 months after step 3 is completed, wait for the grass seeds to grow into a vegetation layer, and conduct the acceptance of the ecological slope protection, including detecting the slope surface flatness, integrity, vegetation growth rate and height.

[0029] The content of humus in the reinforced - moisture - retaining layer 5 is 3%, the content of water - retaining agent is 0.1%, the content of organic fertilizer is 0.2%, and the content of basalt fiber is 0.4%.

[0030] For the seed layer 6, the selected seeds are a mixture of grass seeds at 20 g / m2. The grass seeds are some common grass seeds including legumes and gramineae, such as Coronilla varia, Trifolium repens, purple flower, alfalfa, Eragrostis pilosa, Lolium perenne, Poa annua, Caragana korshinskii, Dactylis glomerata, Bromus inermis, Astragalus adsurgens, etc. The seeds are germinated before spraying. The content of organic fertilizer is 0.2%.

[0031] When mixing the anti - scouring agent, strictly calculate the dosage according to the measurement standard. Sprinkle the powder on the material pile in batches according to the calculated dosage and mix evenly; mix the liquid agent and water in proportion and spray in two times. Spray 80% of the anti - scouring liquid agent for the first time; when spraying for the second time, combine the water content of the mixing material and the weather conditions, mix the water to be added with the remaining 20% of the liquid agent and spray it out, mix the mixing material evenly until there is no white powder visible to the naked eye.

[0032] In the specific implementation of the present invention, as Figure 1-2 shown: The Malan loess used in the following examples is distributed on the tableland surface and gully channels. The Malan loess is yellow - brown, with a lithology of silt soil, uniform texture, loose structure, and collapsibility. The Malan loess covers the top of the loess beam and hillock. The particle size composition of the loess is mainly silt particles, accounting for about 55%, with a relatively high content of easily soluble salts and a granular overhead contact structure Example 1, An ecological slope protection structure and construction method for loess slopes, including the following steps: Step 1, At a slope site of a certain loess, collect soil samples and air - dry them, and conduct particle analysis experiments, liquid - plastic limit experiments, shrinkage experiments, and collapsibility coefficient tests. The measured basic property indexes of the soil are shown in Table 1.

[0033] Table 1: Basic physical properties of loess Step 2, Laboratory - made improved soil production and detection Collect loess soil samples from the slope, use the anti - scouring agent as the curing material, add an appropriate amount of water, and mix thoroughly.

[0034] Scheme 1, The content of the anti - scouring agent aqueous solution C444 is 0.06%, and the content of the powder SD is 0.8% Solution 2: The parameter of the anti-seepage and consolidation agent aqueous solution C444 is 0.06%, and the parameter of the powder SD is 1.2% Solution 3: The parameter of the anti-seepage and consolidation agent aqueous solution C444 is 0.06%, and the parameter of the powder SD is 1.6% The unconfined compressive strength of the solidified loess obtained from the above examples was evaluated. A mold with fixed dimensions was used, with a bottom diameter of 39.1 mm and a height of 80 mm. After mixing the materials, they were pressed into the mold. The prepared specimens were demolded after natural curing for 1 day, and then cured under standard curing conditions until the required age, and the unconfined compressive strength at the age of 28 days was measured. The unconfined compressive strength of each example is shown in Table 2

[0035] Table 2. Unconfined Compressive Strength Table

[0036] Finally, after testing the compressive strength values of Solution 2, the 28-day unconfined compressive strength is between 0.8 MPa and 1.5 MPa, meeting the engineering requirements. Considering the comprehensive economy, the optimal dosage is determined to be Solution 2

[0037] Step 3, on-site construction Step 3.1, slope inspection and cleaning: Debris, floating stones, etc. on the slope surface should be cleaned, and the existing pits on the slope surface should be filled to ensure that the slope surface is relatively smooth along the cross-section

[0038] Step 3.2, pouring the deep solidified layer: Drill oblique micro-holes (hole diameter 2 cm, depth 30 cm, spacing 50 cm × 50 cm), inject 80% of the prepared anti-seepage and consolidation agent aqueous solution into the micro-holes in a segmented grouting manner (pressure 0.5~1.2 MPa). The grouting volume is dynamically adjusted according to the soil porosity, and the remaining 20% is evenly sprayed on the slope surface. After grouting, cover with a plastic film for curing for 3 days

[0039] Step 3.3, slope wire meshing: Manually hang a galvanized iron wire mesh 3 on the slope, with a specification of 1.8 mm and a mesh size of 2.5 cm × 2.5 cm, and fix it with ribbed steel bars 8 with a diameter of 12 mm and U-shaped steel nails 7. The spacing of the U-shaped steel nails 7 is 1000 mm

[0040] Step 3.4, laying the solidified soil layer: Using the hydroseeding technique, which is a technology that uses specific equipment to spray a mixture of imported soil, seeds, granulating agents, greening materials, water retention materials, etc. onto the slope surface in the form of compressed air. This technology uses water as a carrier and solvent, and can complete multiple steps such as seeding, fertilizing, and covering in one operation, greatly shortening the technological process of vegetation establishment and saving a large amount of manpower and financial resources. Pour the anti-scouring and anti-seepage curing agent, loess, and water into the hydroseeding machine case in proportion, and mix evenly to form a slurry. Use the hydroseeding machine to evenly spray the mixed slurry onto the slope surface, and perform multiple constructions to reach a thickness of 8 cm to 12 cm.

[0041] Step 3.5, laying the reinforcement and water retention layer 5: Laying the reinforcement and water retention layer 5 includes loess, water, anti-scouring and anti-seepage curing agent, humus (such as straw, sawdust, etc.), water retaining agent, organic fertilizer, and basalt fiber. Pour the above materials into the hydroseeding machine case in sequence and mix evenly to form a slurry. Use the hydroseeding machine to evenly spray the mixed slurry onto the slope surface, and perform multiple constructions to reach a thickness of 4 cm to 6 cm.

[0042] Step 3.6, spraying the seed layer 6: The seed layer 6 includes seeds, soil curing agent, organic fertilizer, and loess mixed with water to form a slurry. The seeds in the seed layer are selected as a mixed grass seed of 20 g / m2. The grass seeds are some common grass seeds including legumes and gramineae, such as Coronilla varia, Trifolium repens, purple flower, alfalfa, Eragrostis pilosa, Lolium perenne, Poa annua, Caragana korshinskii, Dactylis glomerata, Bromus inermis, Astragalus adsurgens, etc. The seeds are germinated before hydroseeding. The content of organic fertilizer is 0.2%. The seeds are germinated before hydroseeding, and the mixture is sprayed and attached above the substrate layer to form a 2 - 3 cm thick seed layer.

[0043] Step 3.7, covering with non-woven fabric for maintenance: Cover the sprayed slope surface with non-woven fabric for 7 - 14 days of maintenance.

[0044] The humus content in the reinforcement and water retention layer 5 is 3%, the water retaining agent content is 0.1%, the organic fertilizer content is 0.2%, and the basalt fiber content is 0.4%.

[0045] When mixing the anti-scouring and anti-seepage curing agent, strictly calculate the dosage according to the measurement standard. Sprinkle the powder on the material pile in portions according to the calculated dosage and mix evenly. The liquid agent and water are mixed in a ratio of 1:50 - 1:80 (volume ratio), and sprayed in two times. The first time, 80% of the anti-scouring and anti-seepage liquid agent is sprayed; the second time, in combination with the water content of the mixing material and the weather conditions, mix the water to be added with the remaining 20% of the liquid agent and then spray it out. Mix the mixing material evenly until there is no white powder visible to the naked eye.

[0046] The above description is made on the present invention and its embodiments. Such description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design, without creative efforts, structural modes and embodiments similar to the technical solution without departing from the purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A loess slope ecological protection structure, comprising a slope body (1), characterized in that: The slope protection structure comprises a deep solidification layer (2), a wire mesh (3), a solidified soil layer (4), a reinforcement-moisture-retaining layer (5), and a seed layer (6).

2. The loess slope ecological protection structure according to claim 1 is characterized by: The deep solidification layer (2) is formed by mixing the anti-scaling agent aqueous solution C444 and loess in a certain proportion, and is constructed in a coordinated manner by segmented grouting and spraying; The wire mesh (3) is covered on the surface of the deep solidified layer (2), the top of the wire mesh (3) is 60 mm to 70 mm away from the slope of the deep solidified layer (2), and the connection points of the wire mesh (3) are anchored with steel bars; The solidified soil layer (4) is formed by mixing a sulphur-resistant solidifying agent with loess; The reinforcement-moisturizing layer (5) is made of a mixture of a certain proportion of an anti-suspension curing agent, humus (straw, sawdust, etc.), a water-retaining agent, an organic fertilizer, basalt fiber and loess; The seed layer (6) comprises seeds, soil solidifier, organic fertilizer, loess and water mixed together.

3. The loess slope ecological protection structure according to claim 2 is characterized by: The Consolidation soil solidifier comprises two materials: aqueous agent Consolid444 (abbreviated as C444) and powder Solidry (abbreviated as SD).

4. The loess slope ecological protection structure according to claim 2 is characterized by: The parameter of the anti-repellent curing agent aqueous solution C444 in the deep curing layer (2) is 0.04% to 0.06% of the mass of the loess.

5. The loess slope ecological protection structure according to claim 2 is characterized by: The parameter of the anti-sphingidity curing agent aqueous solution C444 in the solidified soil layer (4), the reinforcement-moisturizing layer (5) and the seed layer (6) is 0.06%, and the parameter range of the powder SD is 0.8% to 1.6%.

6. A loess slope ecological slope protection construction method, characterized by: The following steps are involved: S1, Slope inspection and cleaning: The debris on the slope, debris and floating stones within the construction range should be cleaned up, and the existing tunnels on the slope should be filled to ensure that the slope is relatively smooth along the section; S2, grouting deep solidification layer: drill oblique micro-holes (aperture 2cm, depth 30cm, spacing 50cm×50cm), inject 80% of the prepared Kangsholi curing agent water into the micro-holes by segmented grouting (pressure 0.5~1.2MPa), and adjust the grouting amount dynamically according to the soil porosity. Spray the remaining 20% ​​evenly on the slope surface. After grouting, cover with plastic film and maintain for 3 days; S3, hanging mesh on the slope: manually hanging galvanized wire mesh (3) on the slope, with a specification of 1.8 mm and a mesh size of 2.5 cm×2.5 cm, and fixing it with ribbed steel bars (8) with a diameter of 12 mm and U-shaped steel nails (7), with the spacing of the U-shaped steel nails (7) being 1000 mm; S4, laying the solidified soil layer: pour the anti-sulphuric acid curing agent, loess and water into the spraying machine according to the proportion, mix them evenly to form mud; use the spraying machine to spray the mixed mud evenly on the slope surface, and construct it multiple times to reach a thickness of 8cm to 12cm; S5, laying a reinforcement-moisturizing layer: The reinforcement-moisturizing layer (5) includes loess, water, anti-repellent curing agent, humus (straw, sawdust, etc.), water-retaining agent, organic fertilizer, and basalt fiber. The above materials are poured into the spraying machine box in order and mixed evenly to form mud. The mixed mud is evenly sprayed on the slope surface by the spraying machine, and the construction is repeated multiple times to achieve a thickness of 4 cm to 6 cm. S6, spraying the seed layer: the seed layer (6) includes seeds, soil stabilizer, organic fertilizer and loess mixed with water to form a slurry; the seeds are germinated before spraying, and the mixture is sprayed and attached to the top of the substrate layer to form a 2-3 cm seed layer; S7, non-woven fabric maintenance: Cover the sprayed slope with non-woven fabric for maintenance for 7-14 days; S8, completion acceptance of ecological slope protection: 3-6 months after step 3, when the grass seeds grow to form a vegetation layer, the completion acceptance of the ecological slope protection is carried out, including testing the slope flatness, integrity, vegetation growth rate and height.

7. A loess slope ecological slope protection construction method according to claim 6, characterized in that: The reinforcement-moisturizing layer (5) contains 3% humus, 0.1% water retaining agent, 0.2% organic fertilizer and 0.4% basalt fiber.

8. The method for ecological slope protection of loess slope according to claim 6 is characterized by: The seeds of the seed layer (6) are mixed grass seeds at 20g / m2, and the seeds are germinated before spraying. The organic fertilizer parameter is 0.2%.

9. A loess slope ecological protection construction method according to claim 6, characterized in that: When mixing the anti-sphingolipid curing agent, the dosage is calculated strictly according to the measurement standard, and the powder is sprinkled on the material pile in batches according to the calculated dosage to mix evenly; the liquid agent and water are mixed in proportion and sprayed twice, with 80% of the anti-sphingolipid liquid agent being sprayed for the first time; during the second spraying, the water to be added is mixed with the remaining 20% ​​of the liquid agent in combination with the moisture content of the mixed material and the weather conditions, and then sprayed.

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