A combined ecological slope protection system for self-adsorption of pollutants and its application

Abstract

The present invention relates to a combined ecological slope protection system and application for self-adsorbing pollutants. The present invention mainly solves the problem of slope protection by coupling plants and microorganisms with ecological means. The greening rate can reach 100%, achieving a balance between water permeability and water storage on the roadbed slope and slope surface scouring prevention. The present invention only requires a small amount of traditional geotechnical materials. In addition, the protective layer produced by microbial-induced calcium carbonate precipitation reduces rainwater scouring and improves the stability of the slope under heavy rain conditions. It can also achieve the reuse of solid waste. On the one hand, the solid waste forms a retaining wall structure, which withstands soil pressure and improves the stability of the slope, and also solves the problem of plant roots invading the roadbed. Hazardous waste materials can also be used instead of solid waste filling, and plants and microorganisms can be used to harmlessly dispose of the toxicity of hazardous waste. This not only reduces the cost of the project, but also solves the industry pain point of the difficulty in disposing of solid waste and hazardous waste, and has good economic, ecological and social benefits.

Description

Technical Field

[0001] The present invention relates to the technical field of road maintenance, and in particular to a combined ecological slope protection system capable of self-adsorbing pollutants and its application. Background Art

[0002] Today, mankind is facing the huge challenge of climate change. In recent years, due to the surge in carbon emissions and the continuous accumulation of the greenhouse effect, global warming and other problems have occurred. The use of ecological and environmentally friendly methods for engineering construction has become an important means to support the "dual carbon" strategy and green and low-carbon development goals. With the continuous acceleration of urbanization, the number of highway projects has continued to increase and the scale has continued to expand. The construction of a large number of slope protection structures has caused ecological damage. The protection of the slope by stone will cause the slope to become an impermeable structure, which will separate the roadbed structure and the surrounding ecological environment system (such as Figure 1 At the same time, traditional slope protection methods require building materials such as stone or cement, which need to be obtained through quarrying. This not only increases the project cost, but also causes damage to the mountain. Cement production causes energy consumption, environmental pollution and carbon dioxide emissions, which runs counter to the national policy of energy conservation and emission reduction.

[0003] Traditional slope protection, especially stone slopes, has weak ecological restoration capabilities, causing adverse effects on the ecological environment and urban landscape. It mainly considers safety factors, has a relatively simple form, has a general protective effect, and uses a large amount of materials, causing serious damage to the environment.

[0004] Masonry slope protection: Masonry protection for slope protection is generally divided into two types: dry stone masonry and mortar stone masonry ( Figure 2 ). Dry stone protection is inexpensive and can effectively prevent slope scour, sliding and flow-type slope collapse, but it requires the slope itself to have a certain degree of stability. For unstable slopes, using dry stone for protection can easily cause slippage and other phenomena. Mortared stone protection is a permanent engineering protection measure that is suitable for various soil slopes, but the project cost is high and the visual effect is not as good as plant slope protection. The main problem with masonry protection is that it is not in harmony with the surrounding environment, it causes great damage to the ecology, and it requires a large amount of construction and consumes a lot of engineering materials, which does not conform to the concept of environmental protection.

[0005] Laying turf and planting trees for slope protection: The forms of plant slope protection commonly used in China currently mainly include planting grass, laying turf and planting trees ( Figure 3Laying turf has the advantages of simple construction, quick results, and few seasonal restrictions on construction. Plants can increase and reduce the velocity of water flow on slopes, and the extension of roots in the soil can consolidate the slope soil, but they can easily enter the roadbed soil and cause road diseases. As a single means, plants are easily affected, resulting in poor slope protection. The resulting surface runoff causes soil erosion and affects the stability of the slope surface. Vegetation also increases rainwater infiltration, affecting slope stability and potentially fostering deep landslides.

[0006] Directly spray grass seeds to protect the slope ( Figure 4 ): Add water to seeds, fertilizers, etc., stir and mix, then use a spray gun to spray the mixture to a certain thickness on the slope, and then spread erosion prevention agents such as asphalt emulsion for health care. Plants can grow and cover quickly in a relatively short period of time, and the construction is convenient and quick. This method is generally constructed in combination with metal mesh tensioning projects, and has high engineering requirements. This method often fails to achieve satisfactory slope protection effects due to reasons such as uneven sowing of grass seeds, grass seeds easily washed away by rainwater, and low grass survival rate. The soil consolidation and water retention capacity is low, and runoff ditches and erosion are easily formed. Due to improper variety selection and insufficient mixed materials, soil erosion or gullies are likely to occur in the later stages.

[0007] Comprehensive slope protection ( Figure 5 ): Comprehensive protection mainly refers to skeleton plant protection (such as arches, prefabricated concrete blocks, etc.), which is suitable for areas where sand and gravel materials are scarce. Planting grass in the skeleton not only beautifies the slope, but also is conducive to the growth of grass seeds. However, this method still requires a concrete skeleton, which increases the project cost, reduces the vegetation coverage rate, and does not achieve complete ecologicalization. The production of concrete materials may also cause environmental damage, energy consumption and carbon emissions. Skeleton plant slope protection also faces some problems in actual application. For example, before the grass grows up, when it rains heavily, the rainwater gathered above the road may wash away the backfill soil in the skeleton, easily hollowing out the skeleton, causing the skeleton to lose balance as a whole, causing the skeleton to slip and fail, and the requirements for the slope morphology are relatively high. And because the grass is isolated by the concrete skeleton, the overall soil consolidation effect is not good.

[0008] Traditional slope protection with plants is ineffective: Existing ecological slope protection relies solely on the soil-stabilizing properties of plants, and plant roots can also reduce the integrity of the rock mass at their root tips. The soil surface can still be damaged and eroded in water, leading to slope failure. Furthermore, highway slope soil is susceptible to various contaminations during construction, resulting in insufficient soil fertility, which is unfavorable for plant growth and poor slope protection.

[0009] Traditional slope protection has limited ecological benefits: Traditional slope protection methods don't offer high enough greening rates, failing to achieve full ecological benefits. Construction still requires the consumption of building materials like stone and cement, potentially causing environmental pollution, energy consumption, and carbon emissions. Furthermore, the slope protection system doesn't address issues like topsoil erosion caused by rainwater erosion.

[0010] Traditional ecological slope protection is unstable under rainwater conditions: It increases the amount of phreatic water and unsaturated water in the slope during rainwater conditions. Phreatic water levels and the amount of water in the unsaturated zone are key factors influencing rainfall-induced landslides. Unless plants have strong transpiration capabilities to help remove accumulated water from the slope, water retention by plants will reduce the slope's safety factor and increase the risk of landslides during rainwater conditions.

[0011] Therefore, a new type of slope protection structure is urgently needed to solve the above problems. Summary of the Invention

[0012] To address the shortcomings of existing technologies, the present invention provides a combined ecological slope protection system and its application that self-adsorbs pollutants. By integrating engineering mechanics, ecology, botany, soil science, and other disciplines, the present invention utilizes contaminated construction waste as a material, combines microbial-induced calcium carbonate precipitation technology with microbial film formation mechanisms, and develops a microbial-plant combined self-adsorbing heavy metal-contaminated slope protection structure.

[0013] The present invention is achieved through the following technical solutions:

[0014] The first object of the present invention is to provide a combined ecological slope protection system that self-adsorbs pollutants, the combined ecological slope protection system comprising a first ecological layer, a second ecological layer and a retaining wall; the first ecological layer comprises bacterial liquid, fiber material, solid powder and soil; the second ecological layer comprises bacterial liquid, nutrient solution and soil; the second ecological layer is laid on the surface of the retaining wall; the first ecological layer is laid on the surface of the second ecological layer to provide an attachment site for microbially induced calcium carbonate.

[0015] In one embodiment of the present invention, the combined ecological slope protection system further includes plants planted on the surface of the first ecological layer.

[0016] In one embodiment of the present invention, the spacing between the plants is 3 cm to 20 cm.

[0017] In one embodiment of the present invention, the shape of the retaining wall includes a right-angled trapezoid, an isosceles trapezoid or a rectangle, but is not limited to these shapes.

[0018] In one embodiment of the present invention, the retaining wall is made of solid waste and / or hazardous waste particles.

[0019] In one embodiment of the present invention, the particle size of the solid waste and / or hazardous waste particles in the retaining wall is ≤26.5 cm; the particle size gradually decreases from top to bottom, preventing water from continuously infiltrating, playing a role in rainwater retention, and reducing peak flow.

[0020] In one embodiment of the present invention, a plant nutrient solution is provided at the bottom of the retaining wall.

[0021] In one embodiment of the present invention, the thickness of the first ecological layer is 5 cm-15 cm.

[0022] In one embodiment of the present invention, the bacterial species in the bacterial liquid of the first ecological layer are selected from one or more of the genera Proteus, Klebsiella, Pseudomonas and Staphylococcus that can produce urease; the fiber material is selected from one or more of carbon fiber, polyester fiber and polypropylene fiber; and the solid powder is selected from mineral powder, stone powder or solid waste powder.

[0023] In one embodiment of the present invention, the thickness of the second ecological layer is 0.8m-1m.

[0024] In one embodiment of the present invention, the bacterial liquid in the second ecological layer is selected from one or more of Bacillus megaterium, Bacillus gelatinosa, Bacillus laterosporus, Bacillus licheniformis, Bacillus subtilis and Streptomyces jingyangensis.

[0025] In one embodiment of the present invention, the nutrient solution components in the second ecological layer include peptone, yeast extract, and sodium chloride.

[0026] The second object of the present invention is to provide the application of the combined ecological slope protection system in road slope protection.

[0027] The specific construction steps are as follows:

[0028] (1) Laying of solid waste retaining wall. The wall is laid in layers along with the roadbed, and the height is slightly higher than the roadbed by 5cm-10cm. Plant nutrient solution is placed when paving the bottom, and anti-seepage geotextile material is provided between the retaining wall and the roadbed. The thickness of each layer is 15cm-20cm, and the geotextile material is polyvinyl chloride (PVC) and polyethylene (PE). The shape of the retaining wall can be an isosceles trapezoid, a right-angled trapezoid or a rectangle, with an upper base width of 20cm-50cm, a slope close to the roadbed side slope of 1:1 to 1:1.5, and a height consistent with the road structure layer. The retaining wall structure is modified according to the specific conditions of the road.

[0029] (2) After the solid waste retaining wall is completed, the surface of the retaining wall is covered with soil mixed with bacterial solution and nutrient solution (second ecological layer). The soil thickness is 0.8-1m, the slope is 1:1 to 1:1.5, and the bacterial solution can be selected from Bacillus megaterium, Bacillus gelatinous, Bacillus laterosporus, Bacillus licheniformis, Bacillus subtilis, Jingyang Streptomyces and other strains, with a concentration of 0.5×10 9 -3×10 9cfu / ml, the composition of each liter of nutrient solution is 5g-10g peptone, 3g-6g yeast extract, 8g-12g sodium chloride, and the pH value is 7±0.2. Spray 50-100mL of bacterial solution and 1-1.2L of nutrient solution per cubic meter.

[0030] (3) Mix the fiber and soil and spread them evenly on the fill surface with a thickness of 5cm-15cm. The amount of fiber material per square meter is 100g-300g. Spray urease-producing bacteria on the surface and spread mineral powder, stone powder or solid waste powder to obtain the first ecological layer. The fiber material can be selected from carbon fiber, polyester fiber and polypropylene fiber. The selected strains are urease-producing strains such as Bacillus pasteurianus, Bacillus subtilis, Sporosarcina sporogenes, Bacillus lentus, etc. The spraying concentration is 0.2×10 9 -0.6×10 9 cfu / mL, spray 200mL-300mL per square meter until all surfaces of the soil are completely soaked.

[0031] (4) Plant plants on the top of the slope fill. Depending on the specific conditions of the slope, white clover, buffalo grass, and small crown grass can be selected. White clover is suitable for relatively flat slopes, small crown grass can be selected in arid areas, and buffalo grass can be selected for steeper slopes. Plant seedlings should be spaced 3 cm to 20 cm apart. If the retaining material is hazardous waste, vetiver, crabgrass, and wangjiangnan should be selected as heavy metal accumulation plants on the slope.

[0032] (5) After completing the plant covering, spray water and nutrient solution for initial maintenance.

[0033] The schematic diagram of the water storage structure in the present invention is as follows Figure 9 As shown in the figure, from bottom to top, the particle size of solid and hazardous waste particles increases, and their porosity gradually increases. This structure effectively stores water: water is stored in the pores, while the small particles at the bottom, due to their low porosity, prevent continued water infiltration, and the bottom completely blocks water from entering the soil.

[0034] like Figure 10 As shown, the plant roots in this invention provide a biofilm-forming environment for microorganisms, while the dead roots provide nutrients. Simultaneously, the plants absorb heavy metal contaminants leached from solid and hazardous waste. The combined effects of plant roots, microbial biofilms, and microbial-induced calcium carbonate precipitation improve soil impermeability.

[0035] The main function of the waterproof structure is to effectively prevent water from entering the road structure layer and affecting its strength. By setting up seepage channels, water on the road surface is allowed to drain into the roadbed slope. In particular, if the road surface is permeable, the water from the permeable road surface can be directly discharged into the roadbed, reducing the peak drainage volume of the road drainage ditch. The main function of the fiber is to reduce soil porosity, increase soil strength, and provide an attachment site for microorganisms to induce calcium carbonate. The main function of the plant nutrient solution is to provide nutrients and attract plant roots to grow downward, preventing plant roots from growing horizontally into the road structure layer and causing road diseases. The main function of the geotextile is to prevent water from flowing into the roadbed and causing roadbed damage.

[0036] The particle structure of solid waste and hazardous waste has four functions:

[0037] (1) The structure of gradually increasing isolation from bottom to top can provide pores, effectively storing water and providing moisture for the growth of plants and microorganisms;

[0038] (2) Solid waste and hazardous waste have relatively few nutrients. By surrounding the upper root system of plants, they can promote the downward growth of plant roots, thereby improving the biological reinforcement effect and anti-seepage effect;

[0039] (3) The metal pollutants carried are leached out with water and adsorbed by plants, achieving the purpose of purifying solid waste and hazardous waste pollution;

[0040] (4) Form a structural layer, act as a retaining wall, and withstand soil pressure.

[0041] Microorganisms have three functions:

[0042] (1) Microorganisms can decompose dead plant roots, use them as nutrients, accelerate the decomposition of organic matter, produce quick-acting nutrients and power for plant growth, realize ecological circulation, and become decomposers in the self-circulating system;

[0043] (2) Some microorganisms can promote the absorption rate of nitrogen, phosphorus, potassium and other elements by plants, promote the growth of plant roots, regulate life activities, and establish a protective barrier at the roots to prevent the invasion of pathogens;

[0044] (3) Microbial growth can form a microbial film, thereby reducing soil permeability and improving the ability to conserve water.

[0045] The plant has three main functions:

[0046] (1) Plant roots can form biological reinforcement for the soil, increasing the strength of the soil. As the plants grow, the roots gradually grow and develop, and the reinforcement effect continues to improve, increasing the greening rate, improving the slope's ability to resist rainwater erosion, and improving the ecological environment;

[0047] (2) The root system of the plant can provide a place and nutrients for the growth and biofilm formation of microorganisms. The formation of microbial biofilm can further reduce the permeability of the soil and improve the ability to conserve water.

[0048] (3) It can enrich metal pollutants and achieve purification of solid waste and hazardous waste.

[0049] The self-adsorbed heavy metal pollution slope protection structure has three main functions: in the short term, solid waste of different particle sizes is used to achieve a water storage effect, while preventing water from entering the road structure layer, and microbial induced calcium carbonate precipitation technology strengthens the soil to prevent soil loss; in the medium term, with the growth of plant roots, the underlying soil layer can be biologically reinforced, thereby improving the strength and anti-seepage capacity of the lower soil; in the long term, microorganisms form biofilms in the soil to play a role in seepage prevention, and combined with plant root reinforcement, an ecological anti-seepage layer can be formed. Plants absorb heavy metal pollution from solid waste and hazardous waste, ultimately ensuring the stability of the road slope and achieving the effect of ecological restoration.

[0050] The above technical solution of the present invention has the following advantages over the prior art:

[0051] The present invention describes a self-adsorbing pollutant-enhancing microbial-plant ecological slope protection system that primarily addresses slope protection issues through an ecologically coupled plant-microbial approach. This system can achieve a 100% greening rate, achieving a balance between permeable water storage and slope scour prevention. In this patent, plant roots not only form a reinforcing structure to strengthen the slope soil layer, but also form a perfect symbiotic relationship with the microbial community, improving the soil's water and soil conservation capacity and enhancing the stability of the ecosystem. This patent requires no or only minimal amounts of traditional geotechnical materials, demonstrating its ecological benefits. Furthermore, the protective layer created by microbially induced calcium carbonate precipitation reduces rainwater scour and improves slope stability during heavy rain. Furthermore, this patent allows for the reuse of solid waste, which forms a retaining wall structure that withstands soil pressure and improves slope stability while also addressing the problem of plant root intrusion into the roadbed. Hazardous waste materials can also be used instead of solid waste fillers, and plants and microorganisms can be used to neutralize the toxicity of hazardous waste. This not only reduces project costs but also addresses the industry's pain point of difficult solid and hazardous waste disposal, resulting in significant economic, ecological, and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0053] Figure 1 It is the road slope protection diagram in the background technology of the present invention;

[0054] Figure 2It is the masonry slope protection form in the background technology of the present invention; Figure 2 -A is mortar-laid stone protection; Figure 2 -B is dry stone protection;

[0055] Figure 3 It is the plant slope protection form in the background technology of the present invention; Figure 3 -A is for laying turf for slope protection; Figure 3 -B is plant slope protection;

[0056] Figure 4 It is the hydraulic spraying of grass seeds in the background technology of the present invention;

[0057] Figure 5 It is a comprehensive slope protection form in the background technology of the present invention; Figure 5 -A is an arched skeleton slope protection; Figure 5 -B is hexagonal brick slope protection;

[0058] Figure 6 This is a diagram of the slope protection structure for self-adsorption of heavy metal pollution according to the present invention;

[0059] Figure 7 is the retaining wall of the present invention; wherein Figure 7 -A is a right-angled trapezoid; Figure 7 -B is an isosceles trapezoid; Figure 7 -C is a rectangle, but is not limited to the above form;

[0060] Figure 8 is the fiber type of the present invention; wherein Figure 8 -A is carbon fiber; Figure 8 -B is polyester fiber; Figure 8 -C is polypropylene fiber;

[0061] Figure 9 It is a schematic diagram of the water storage structure in the present invention;

[0062] Figure 10 It is the microorganism-plant combined ecological slope protection system of the present invention;

[0063] Figure 11 This is a schematic structural diagram of Example 1 of the present invention;

[0064] Figure 12 This is a schematic structural diagram of Example 2 of the present invention;

[0065] Figure 13 It is a structural diagram of Example 3 of the present invention. DETAILED DESCRIPTION

[0066] To facilitate understanding of the present invention, the present invention will be described more fully below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0068] Example 1

[0069] like Figure 11 As shown, the retaining wall of this embodiment is a solid waste right-angled trapezoidal retaining wall with a wall height of 4m and a slope of 1:1. The solid waste grading ranges are 19.00mm-26.5mm, 16.00mm-19.00mm, 13.20mm-16.00mm, 9.50mm-13.20mm, 4.75mm-9.50mm and <4.75mm. The wall is laid in layers along with the roadbed, and the height is 5cm higher than the roadbed. An anti-seepage geotextile material is provided between the retaining wall and the roadbed. The thickness of each layer is 20cm, and the geotextile material is polyvinyl chloride. After the solid waste retaining wall is completed, a soil with a thickness of 1m is covered on its surface, with a slope of 1:1.2. A mixture of carbon fiber and soil is laid on the soil surface with a thickness of 8cm, and the amount of carbon fiber used is 300g per square meter. Spray 100mL of Bacillus subtilis solution per cubic meter of soil on the soil at a concentration of 1×10 9 cfu / mL. Spray 1000mL of nutrient solution per cubic meter, the ingredients are 5g of peptone, 5g of yeast extract, 10g of sodium chloride per liter, and the pH value is 7.1. Spray 250mL of Bacillus pasteurianus per square meter on the fill surface until all surfaces of the soil are completely infiltrated. The spraying concentration is 0.5×10 9 cfu / mL, spread calcium chloride powder and solid waste powder. Plant vetiver seedlings on the top of the slope fill, spacing them 5 cm apart. After completing the plant cover, spray water and nutrient solution for initial maintenance.

[0070] Example 2

[0071] like Figure 12As shown, the retaining wall of this embodiment is a hazardous waste right-angled trapezoidal retaining wall with a wall height of 3m. The solid waste grading ranges are 19.00mm-26.5mm, 16.00mm-19.00mm, 13.20mm-16.00mm, 9.50mm-13.20mm, 4.75mm-9.50mm and <4.75mm respectively. The wall is paved in layers together with the roadbed, and the height is 10cm higher than the roadbed. An anti-seepage geotextile material is provided between the retaining wall and the roadbed. The thickness of each layer is 15cm, and the geotextile material is polyethylene. After the solid waste retaining wall is completed, the side is covered with soil, the surface is covered with soil, the slope is 1:1.2, and nutrient solution is placed at the bottom of the cover. A mixture of polyester fiber and soil is spread on the surface of the cover with a thickness of 5cm, and the amount of polyester fiber is 150g per square meter. Spray 150mL of Bacillus licheniformis solution per cubic meter of soil at a concentration of 2×10 9 cfu / mL. Spray 1200mL of nutrient solution per cubic meter, the ingredients are 5g peptone, 6g yeast extract, 12g sodium chloride per liter, and the pH value is 7.0. Spray 100mL of Proteus mirabilis per square meter on the fill surface until all surfaces of the soil are completely infiltrated. The spraying concentration is 0.5×10 9 cfu / mL, spread calcium chloride powder and solid waste powder. Plant buffalo grass seedlings on the top of the slope fill, spacing them 3 cm apart. After completing the plant cover, spray water and nutrient solution for initial maintenance.

[0072] Example 3

[0073] like Figure 13 As shown, the retaining wall of this embodiment is a constant weight retaining wall with a wall height of 6m. The solid waste grading ranges are 19.00mm-26.5mm, 16.00mm-19.00mm, 13.20mm-16.00mm, 9.50mm-13.20mm, 4.75mm-9.50mm and <4.75mm respectively. The wall is paved in layers together with the roadbed, and the height is 10cm higher than the roadbed. An anti-seepage geotextile material is provided between the retaining wall and the roadbed. The thickness of each layer is 20cm, and the geotextile material is polyethylene. After the solid waste retaining wall is completed, the side is covered with soil, the surface is covered with soil, and nutrient solution is placed at the bottom of the cover. A mixture of polyester fiber and soil is laid on the surface of the cover with a thickness of 10cm, and the amount of polyester fiber is 250g per square meter. Spray 100mL of jelly-like Bacillus subtilis solution per cubic meter on the soil with a concentration of 2×10 9 cfu / mL. Spray 1200mL of nutrient solution per cubic meter, the ingredients are 8g peptone, 6g yeast extract, 10g sodium chloride per liter, and the pH value is 7.0. Spray 100mL of Klebsiella per square meter on the fill surface until all surfaces of the soil are completely soaked. The spraying concentration is 0.6×10 9cfu / mL, spread calcium chloride powder and solid waste powder. Plant white clover seedlings on top of the slope fill, spacing them 5 cm apart. After completing the plant cover, spray water and nutrient solution for initial maintenance.

[0074] Test Case

[0075] To further compare the effectiveness of this embodiment with traditional roadbed slope protection, calculations were conducted for slope stability, maximum water storage capacity, and the time of occurrence of the maximum peak flow in the drainage ditch under the conditions of a road surface width of 9 m, a slope height of 5 m, a slope gradient of 1:1.5, and a rainfall of 100 mm / day. The results are shown in Table 1. These results demonstrate that the self-adsorbing pollutant-combined ecological slope protection system prepared by the present invention can effectively improve slope stability, effectively store water under rainfall conditions, and delay the occurrence of peak flow.

[0076] Table 1 Slope stability and water storage peak extension effect under different slope types

[0077]

[0078]

[0079] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A combined ecological slope protection system for self-adsorbing pollutants, characterized in that: The combined ecological slope protection system includes a first ecological layer, a second ecological layer, and a retaining wall; the first ecological layer includes bacterial solution, fiber material, solid powder, and soil; the second ecological layer includes bacterial solution, nutrient solution, and soil; the second ecological layer is laid on the surface of the retaining wall; the first ecological layer is laid on the surface of the second ecological layer to provide an attachment site for microorganisms to induce calcium carbonate; and the system also includes plants planted on the surface of the first ecological layer; The material of the retaining wall includes solid waste and / or hazardous waste particles; the particle size of the solid waste and / or hazardous waste particles in the retaining wall is ≤26.5 cm; the particle size gradually decreases from top to bottom, preventing continuous infiltration of water, playing a role in rainwater retention, and reducing peak flow.

2. The combined ecological slope protection system according to claim 1 is characterized in that: The spacing between the plants is 3 cm to 20 cm.

3. The combined ecological slope protection system according to claim 1 is characterized in that: Plant nutrient solution is provided at the bottom of the retaining wall.

4. The combined ecological slope protection system according to claim 1 is characterized in that: The thickness of the first ecological layer is 5 cm to 15 cm.

5. The combined ecological slope protection system according to claim 1 is characterized in that: The thickness of the second ecological layer is 0.8 m-1 m.

6. The combined ecological slope protection system according to claim 1, characterized in that: The bacterial liquid in the second ecological layer is selected from one or more of Bacillus megaterium, Bacillus gelatinosa, Bacillus laterosporus, Bacillus licheniformis, Bacillus subtilis and Streptomyces jingyangensis.

7. Application of the combined ecological slope protection system according to claim 1 in road slope protection.

Images