CN116145697A - Combined ecological slope protection system capable of absorbing pollutants automatically and application - Google Patents
Combined ecological slope protection system capable of absorbing pollutants automatically and application Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
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Abstract
The invention relates to a combined ecological slope protection system capable of absorbing pollutants automatically and application thereof. The invention mainly uses ecological means to couple plants and microorganisms to solve the slope protection problem, the greening rate can reach 100%, and the balance between the water permeation and water storage of the roadbed slope and the scour prevention of the slope is realized. According to the invention, only a small amount of traditional geotechnical materials are needed, and in addition, the protective layer generated by microorganism-induced calcium carbonate precipitation reduces rain wash and improves the stability of the slope under the condition of heavy rain. And can realize solid waste's recycle, solid waste has formed retaining wall structure on the one hand, bears soil pressure and has promoted side slope stability, has also solved the plant root system and has invaded the road bed problem. The hazardous waste material can be used for replacing solid waste filling, and the hazardous waste toxicity is treated harmlessly by utilizing plants and microorganisms, so that the engineering cost is reduced, the industrial pain points of difficult solid waste and hazardous waste treatment are solved, and the hazardous waste filling device has good economic benefit, ecological benefit and social benefit.
Description
Technical Field
The invention relates to the technical field of road maintenance, in particular to a combined ecological slope protection system capable of absorbing pollutants automatically and application thereof.
Background
Nowadays, people face a great challenge of climate change, and in recent years, due to the rapid increase of carbon emission and the continuous accumulation of greenhouse effect, global climate warming and the like are caused, engineering construction is carried out by using an ecological environment-friendly mode, and the method becomes an important means for assisting a 'two-carbon' strategy and a green low-carbon development target. Along with the continuous acceleration of the urban process, the number of highway projects is continuously increased, the scale is continuously enlarged, and the construction of a large number of slope protection structures causes ecological damage. The rubble-protected slope may cause the slope to be a watertight structure, a split subgrade structure and a surrounding ecosystem (as shown in fig. 1). Meanwhile, the traditional slope protection mode needs building materials such as stones or cement, the construction materials are obtained by mountain-making and stone-picking, on the one hand, the engineering cost is increased, on the other hand, mountain damage is caused by mountain-making and stone-picking activities, and energy consumption, environmental pollution and carbon dioxide emission are caused by cement production, which is contrary to the national policy of energy conservation and emission reduction.
Traditional bank protection especially stone side slope ecological restoration ability is weaker, causes harmful effect to ecological environment and urban landscape, mainly considers the factor of safety, and the form is simpler, and the protective effect is general, and uses material quantity big, and is serious to the destruction of environment.
Masonry slope protection: masonry protection work slope protection is generally divided into dry masonry and slurry masonry (figure 2). The dry masonry stone protection has low cost, can effectively prevent side slope scouring and prevent sliding type and flowing type side slope slumping, but needs the side slope to have certain stability, and is easy to cause slipping and other phenomena when the unstable side slope is protected by adopting dry masonry stone. The slurry rubble protection is a permanent engineering protection measure, is suitable for various soil slopes, but has higher engineering cost and has poor visual effect as plant slope protection. The main problems of masonry protection are that the masonry protection is not coordinated with the surrounding environment, the ecological damage is extremely large, the construction amount is large, the engineering material consumption is large, and the environmental protection concept is not complied with.
Grass laying, tree planting and slope protection: the plant protection forms commonly used at home at present mainly comprise grass planting, turf laying and tree planting (figure 3). The sod has the advantages of simple construction, quick effect, less limitation of construction seasons and the like. Plants can increase and reduce the flow velocity of slope water flow, and the extension of root systems in soil bodies can play a role in solidifying slope soil, but easily enter roadbed soil to cause road diseases. As a single means, the plants are easy to influence to cause poor slope protection effect, and the produced surface runoff causes water and soil loss to influence the stability of the surface layer of the side slope. And the vegetation can increase the infiltration amount of rainwater, influence the stability of the side slope, and possibly inoculate a deep landslide.
Directly spraying grass seed slope protection (fig. 4): adding water into seeds, fertilizers and the like, stirring and mixing, spraying the mixture to a slope with a certain thickness by using a spray gun, and then spraying corrosion inhibitor such as asphalt emulsion and the like for health maintenance. Plants can grow and cover quickly in a short time, and the construction is convenient and quick. The method is generally combined with metal mesh tensioning engineering for construction, and has high engineering requirements. The method is characterized in that due to uneven sowing of grass seeds, the grass seeds are easy to wash away by rainwater, the survival rate of the planted grass is low, and the like, the satisfactory side slope protection effect is often not achieved, the soil fixation and water retention capacity is low, and runoff grooves and erosion are easy to form. Due to improper variety selection and insufficient mixed materials, water and soil loss or gully is easy to cause in the later stage.
Comprehensive slope protection (fig. 5): the comprehensive protection mainly refers to skeleton plant protection (such as arches, concrete precast blocks and the like), and is applicable to areas with lacking sand and stone materials. Grass is planted in the framework, which not only beautifies the side slope, but also is beneficial to the growth of grass seeds. However, the surface of the method still needs a concrete skeleton, which improves the engineering cost, reduces the vegetation coverage rate and does not achieve complete ecology. The production of concrete materials may also lead to environmental damage, energy consumption and carbon emissions. The framework plant slope protection can also face some problems in practical application, such as before grass grows up, rainwater gathered above a road possibly scour backfill in the framework when rainfall is large, the framework is easy to empty, the whole framework is unbalanced, framework sliding damage is caused, and the requirement on the slope form is high. And because the grass is isolated by the concrete skeleton, the soil fixing effect is poor.
Traditional side slope plant protection effect is not good: the existing ecological slope protection only utilizes the soil fixing effect of plants, and plant root systems can also play a role in reducing the integrity of root end rock mass. The soil surface can still be damaged and lost under the water environment, so that the side slope is damaged. And the soil of the highway side slope is easy to be polluted in various ways during construction, so that the soil fertility is insufficient, the plant growth is unfavorable, and the slope protection effect is poor.
Traditional bank protection ecological effect is limited: the greening rate of the traditional slope protection mode is not high enough, and complete ecology cannot be achieved. Building materials such as stones and cement still need to be consumed in slope protection construction, environmental pollution, energy consumption and carbon emission can be caused, and the problems of surface soil water and soil loss and the like caused by rain wash cannot be solved on the slope protection effect.
Traditional ecological bank protection is unstable under the rainwater condition: the traditional ecological slope protection can increase diving and unsaturated zone stagnant water in the slope under the rainwater condition, and the diving level and the unsaturated zone stagnant water are key influencing factors of rainfall type landslide. Unless the plants themselves have strong transpiration capability to assist in removing water accumulated in the slope, the water accumulation of the plants can relatively reduce the slope safety coefficient, and landslide is easily caused under the condition of rainwater.
Therefore, a new slope protection structure is needed to solve the above problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a combined ecological slope protection system capable of absorbing pollutants automatically and application thereof. The invention comprehensively considers engineering mechanics, ecology, botanic, soil science and other subjects, and utilizes the polluted construction waste as a material, and combines the microorganism-induced calcium carbonate precipitation technology and the microorganism film forming mechanism to form the side slope protection structure technology of microorganism-plant combined self-adsorption heavy metal pollution.
The invention is realized by the following technical scheme:
the first object of the invention is to provide a combined ecological slope protection system capable of absorbing pollutants automatically, which comprises a first ecological layer, a second ecological layer and a retaining wall; the first ecological layer comprises bacterial liquid, fiber materials, solid powder and soil; the second ecological layer comprises bacterial liquid, nutrient solution and soil; the second ecological layer is paved on the surface of the retaining wall; the first ecological layer is laid on the surface of the second ecological layer, and an attachment site is provided for microorganism-induced calcium carbonate.
In one embodiment of the invention, the combined ecological slope protection system further comprises plants planted on the surface of the first ecological layer.
In one embodiment of the invention, the plants are spaced apart by 3cm to 20cm.
In one embodiment of the present invention, the shape of the retaining wall includes, but is not limited to, a right trapezoid, an isosceles trapezoid, or a rectangle.
In one embodiment of the present invention, the retaining wall material includes solid waste and/or hazardous waste particles.
In one embodiment of the invention, the particle size of solid waste and/or hazardous waste particles in the retaining wall is less than or equal to 26.5cm; the particle diameter is gradually reduced from top to bottom, moisture is prevented from continuously leaking downwards, a rainwater retention effect is achieved, and peak flow is reduced.
In one embodiment of the invention, the bottom of the retaining wall is provided with a plant nutrient solution.
In one embodiment of the invention, the thickness of the first ecological layer is 5cm-15cm.
In one embodiment of the present invention, the bacterial species in the bacterial liquid of the first ecological layer is selected from one or more of the genus 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; the solid powder is selected from mineral powder, stone powder or solid waste powder.
In one embodiment of the invention, the thickness of the second ecological layer is 0.8m-1m.
In one embodiment of the invention, the bacterial liquid in the second ecological layer is selected from one or more of bacillus megaterium, bacillus mucilaginosus, bacillus laterosporus, bacillus licheniformis, bacillus subtilis and streptomyces jingyangensis.
In one embodiment of the invention, the nutrient solution component in the second ecological layer comprises peptone, yeast extract, sodium chloride.
The second purpose of the invention is to provide the application of the combined ecological slope protection system in road slope protection.
The concrete construction steps are as follows:
(1) Paving a solid waste retaining wall. The wall body is paved layer by layer along with the roadbed, and the height of the wall body is slightly higher than 5cm-10cm of the roadbed. Plant nutrient solution is placed when the bottom is paved, and an impermeable geotextile material is arranged between the retaining wall and the roadbed. Each layer of the geotextile is paved with 15cm-20cm thick, and the geotextile material is polyvinyl chloride (PVC) and Polyethylene (PE). The retaining wall can be isosceles trapezoid, right trapezoid or rectangle, the width of the upper bottom is 20cm-50cm, the gradient of the gradient close to the roadbed side is 1:1-1:1.5, and the height is consistent with the road structure layer. The retaining wall structure is modified according to the specific condition of the road.
(2) After the solid waste retaining wall is completed, the surface of the retaining wall is covered with soil (a second ecological layer) mixed with bacterial liquid and nutrient liquid. The soil thickness is 0.8-1m, the gradient and the ratio are 1:1-1:1.5, and the bacterial liquid can be selected from bacillus megatherium, bacillus mucilaginosus, bacillus laterosporus, bacillus licheniformis, bacillus subtilis, streptomyces jingyang and other strains, and the concentration is 0.5x10 9 -3×10 9 cfu/ml, wherein each liter of nutrient solution comprises 5g-10g of peptone, 3g-6g of saccharomycetes extract, 8g-12g of sodium chloride, and the pH value is 7+/-0.2. Spraying 50-100mL of bacterial liquid and 1-1.2L of nutrition per cubic meterAnd (3) liquid.
(3) Uniformly stirring and spreading the fiber and soil on the surface of the filled soil, wherein the thickness is 5cm-15cm, the dosage of fiber materials per square meter is 100g-300g, spraying urease-producing bacteria on the surface of the fiber materials, and spreading mineral powder, stone powder or solid waste powder to obtain a first ecological layer. Wherein the fiber material can be selected from carbon fiber, polyester fiber and polypropylene fiber. The selected strain is urease strain such as Bacillus pasteurii, bacillus subtilis, sarcina, bacillus lentus, etc., and the spraying concentration is 0.2X10 9 -0.6×10 9 And (3) spraying 200-300 mL of cfu/mL per square meter to each surface of the soil body for complete infiltration.
(4) Plants are planted on the upper part of the side slope filling soil, the plants can be selected to be white clover, bishop and small crown flowers according to the specific conditions of the side slope, the white clover is suitable for flatter side slopes, the small crown flowers can be selected in arid areas, and the bishop can be selected in steeper side slopes. The plant seedlings are spaced 3cm to 20cm apart. If the soil retaining material is dangerous waste, vetiver grass, crab grass and Wangjiang south are selected as slope heavy metal enrichment plants.
(5) And after the plant is covered, spraying water and nutrient solution for primary maintenance.
The schematic diagram of the water accumulation structure in the invention is shown in fig. 9, the particle size of solid waste and dangerous waste particles is increased from bottom to top, and the porosity is gradually increased. This structure can effectively store water: moisture is stored in the pores, and the lower small-particle-size part can prevent the moisture from continuously permeating downwards because of the small porosity, and the bottom can completely prevent the moisture from entering the soil body.
As shown in figure 10, the plant root system provides a film forming place for microorganisms, the dead root system provides nutrients, and the plants adsorb solid waste and dangerous leached heavy metal pollution. The plant root system, the microbial biomembrane function and the microbial induced calcium carbonate precipitation technology are combined to improve the impermeability of soil.
The waterproof structure mainly plays a role in effectively preventing water from entering the road structure layer and affecting the strength. By providing a seepage passage, water on the road surface is allowed to drain into the roadbed slope. Particularly, if the road surface is a permeable road surface, the water on the permeable road surface can be directly discharged into the roadbed, and the peak water discharge of the road drainage ditch is reduced. The fiber has the main functions of reducing soil pores, increasing soil strength and providing an attachment site for microorganism-induced calcium carbonate. The main function of the plant nutrient solution is to provide nutrients and attract plant root systems to grow downwards, so that the plant root systems are prevented from transversely growing into road structural layers to cause road diseases. The geotextile is mainly used for preventing moisture from flowing into the roadbed to cause roadbed damage.
The solid waste and dangerous waste particle structure has four functions:
(1) The structure which is gradually increased from bottom to top is isolated, so that pores can be provided, a water storage effect is effectively achieved, and growing moisture is provided for plants and microorganisms;
(2) The solid waste and the dangerous waste have fewer nutrients, and the plant root system can be promoted to grow downwards by surrounding the upper root system of the plant, so that the biological reinforcement effect and the seepage prevention effect are improved;
(3) The carried metal pollutants are leached out along with the water and are adsorbed by plants, so that the aim of purifying solid waste and dangerous waste pollution is fulfilled;
(4) And a structural layer is formed, so that the retaining wall effect is achieved, and the soil pressure is born.
Microorganisms have three roles:
(1) The microorganism can decompose dead root systems of plants, and takes the dead root systems as nutrients to accelerate the decomposition of organic substances, so that available nutrients and power are manufactured for plant growth, ecological circulation is realized, and the dead root systems become decomposers in a self-circulation system;
(2) Part of microorganisms can promote the absorption rate of plants to nitrogen, phosphorus, potassium and other elements, promote the growth of plant root systems, regulate vital activities, establish a protective barrier at the root and prevent pathogenic bacteria from invading;
(3) Microbial growth can form microbial films, so that the permeability of soil is reduced, and the capability of conserving hydrology is improved.
The plants have three main effects:
(1) The plant root system can biologically stiffen soil, so that the strength of the soil body is improved, the stiffening effect is continuously improved along with the gradual growth and development of the plant root system, the greening rate is increased, the rainwater scouring resistance of the slope is improved, and the ecological environment is improved;
(2) The root system of the plant can provide places and nutrient substances for the growth and film formation of microorganisms, and the formation of the microbial film can further reduce the permeability of soil and improve the capability of conserving hydrology;
(3) Can enrich metal pollutants and realize purification of solid waste and hazardous waste.
The side slope protection structure with self-absorption heavy metal pollution mainly has three functions: in short term, solid wastes with different particle sizes are utilized to achieve a water storage effect, meanwhile, moisture is prevented from entering a road structure layer, and a microorganism-induced calcium carbonate precipitation technology is used for reinforcing soil to prevent soil loss; in the middle stage, as the plant root system grows, biological reinforcement can be carried out on the soil layer below, so that the strength and the impermeability of the soil body below are improved; in the long term, microorganisms form biological films in soil bodies to play a role in resisting seepage, a layer of ecological impermeable layer can be formed by matching with plant root system reinforcement, plants absorb heavy metal pollution from solid waste and dangerous waste, and finally, the stability of road slopes is guaranteed and the ecological restoration effect is achieved.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the microorganism-plant combined ecological slope protection system capable of absorbing pollutants mainly uses ecological means to couple plants-microorganisms to solve the slope protection problem, the greening rate can reach 100%, and the balance between water permeation, water storage and slope scour prevention is realized. In this patent, plant root system both can form reinforcement structure reinforcing side slope soil layer, can also form perfect symbiotic relation with the microbial community, has improved the conservation water and soil ability of soil, has promoted ecosystem's stability. The implementation of the patent requires no or only a small amount of traditional geotechnical materials, which is an expression of ecological benefits. In addition, the protective layer produced by the microorganism-induced calcium carbonate precipitation reduces rain erosion, improves the stability of the slope under the condition of heavy rain, can realize the reutilization of solid waste in the patent, forms a retaining wall structure on one hand, bears soil pressure, improves the stability of the slope, and also solves the problem that plant roots invade the roadbed. The hazardous waste material can be used for replacing solid waste filling, and the hazardous waste toxicity is treated harmlessly by utilizing plants and microorganisms, so that the engineering cost is reduced, the industrial pain points of difficult solid waste and hazardous waste treatment are solved, and the hazardous waste filling device has good economic benefit, ecological benefit and social benefit.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.
FIG. 1 is a road slope protection diagram in the background of the invention;
figure 2 is a masonry slope form in the background of the invention; wherein fig. 2-a is a grout stone guard; FIG. 2-B is a drystone guard;
FIG. 3 is a plant slope protection form in the background of the invention; wherein fig. 3-a is a sod slope; FIG. 3-B shows a plant slope protection;
FIG. 4 is a hydraulic spray-seeding grass seeds in the background of the invention;
FIG. 5 is a schematic diagram of a composite slope protection form in the background of the invention; wherein fig. 5-a shows an arch skeleton slope protection; FIG. 5-B shows a hexagonal brick slope protection;
FIG. 6 is a side slope protection structure diagram of the self-adsorption heavy metal pollution;
fig. 7 is a retaining wall according to the present invention; wherein fig. 7-a is a right trapezoid; FIG. 7-B is an isosceles trapezoid; FIG. 7-C is rectangular, but is not limited to the form described above;
FIG. 8 is a fiber type in the present invention; wherein fig. 8-a is a carbon fiber; FIG. 8-B is a polyester fiber; FIG. 8-C is a polypropylene fiber;
FIG. 9 is a schematic view of a water accumulation structure in the present invention;
FIG. 10 is a microbial-plant combined ecological slope protection system of the present invention;
fig. 11 is a schematic structural view in embodiment 1 of the present invention;
fig. 12 is a schematic structural view in embodiment 2 of the present invention;
fig. 13 is a schematic structural view in embodiment 3 of the present invention.
Detailed Description
The present invention will be described more fully hereinafter in order to facilitate an understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Example 1
As shown in FIG. 11, the retaining wall of the embodiment is a solid waste right trapezoid retaining wall, the height of the wall is 4m, the gradient is 1:1, and 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 the solid waste grading ranges are respectively 19.00 mm-16.5 mm, 16.00 mm-16.00mm, 9.50 mm-9.75 mm<4.75mm. The wall body is paved layer by layer along with the roadbed, and the height of the wall body is 5cm higher than that of the roadbed. An impermeable geotextile material is arranged between the retaining wall and the roadbed. Each layer of pavement thickness is 20cm, and the geotextile material is polyvinyl chloride. After the solid waste retaining wall is finished, covering soil with the thickness of 1m on the surface of the solid waste retaining wall, wherein the gradient is 1:1.2. The mixture of carbon fiber and soil is paved on the soil surface, the thickness is 8cm, and the dosage of the carbon fiber is 300g per square meter. Spraying 100mL of bacillus subtilis bacterial liquid per cubic meter on soil paved on soil with the concentration of 1 multiplied by 10 9 cfu/mL. 1000mL of nutrient solution is sprayed per cubic meter, and the ingredients are 5g of peptone, 5g of saccharomycetes extract, 10g of sodium chloride and the pH value is 7.1. Spraying 250mL of Bacillus pasteurii on each square meter of the soil surface until each surface of the soil body is completely soaked, wherein the spraying concentration is 0.5X10 9 cfu/mL, spreading calcium chloride powder and solid waste powder. Planting vetiver seedlings on the upper part of the side slope filling soil, wherein the plant spacing is 5cm. And after the plant is covered, spraying water and nutrient solution for primary maintenance.
Example 2
As shown in figure 12 of the drawings,the retaining wall of the embodiment is a dangerous waste right trapezoid retaining wall, the height of the wall is 3m, and 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 respectively<4.75mm. The wall body is paved layer by layer along with the roadbed, and the height of the wall body is 10cm higher than that of the roadbed. An impermeable geotextile material is arranged between the retaining wall and the roadbed. Each layer of pavement thickness is 15cm, and the geotextile material is polyethylene. After the solid waste retaining wall is finished, covering soil is carried out on the side face of the solid waste retaining wall, the soil is covered on the surface of the solid waste retaining wall, the gradient is 1:1.2, and nutrient solution is placed at the bottom of the covered soil. And (3) paving a mixture of polyester fiber and soil on the surface of the covered soil, wherein the thickness of the mixture is 5cm, and the consumption of the polyester fiber is 150g per square meter. 150mL of bacillus licheniformis bacteria liquid is sprayed on the soil per cubic meter, and the concentration is 2 multiplied by 10 9 cfu/mL. 1200mL of nutrient solution is sprayed per cubic meter, and the ingredients are 5g of peptone, 6g of saccharomycetes extract, 12g of sodium chloride and the pH value is 7.0. Spraying 100mL of Proteus mirabilis per square meter on the surface of the filled soil until each surface of the soil body is completely soaked, wherein the spraying concentration is 0.5X10 9 cfu/mL, spreading calcium chloride powder and solid waste powder. And planting the bishop seedlings on the upper part of the side slope filling soil, wherein the plant spacing is 3cm. And after the plant is covered, spraying water and nutrient solution for primary maintenance.
Example 3
As shown in FIG. 13, the retaining wall of this embodiment is a constant weight retaining wall, the wall height is 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 the solid waste grading ranges are respectively<4.75mm. The wall body is paved layer by layer along with the roadbed, and the height of the wall body is 10cm higher than that of the roadbed. An impermeable geotextile material is arranged between the retaining wall and the roadbed. Each layer of pavement thickness is 20cm, and the geotextile material is polyethylene. After the solid waste retaining wall is finished, the side surface of the solid waste retaining wall is covered with soil, the surface of the solid waste retaining wall is covered with soil, and nutrient solution is placed at the bottom of the covered soil. The mixture of polyester fiber and soil is paved on the surface of the soil cover, the thickness is 10cm, and the dosage of the polyester fiber is 250g per square meter. 100mL of bacillus mucilaginosus bacterial liquid is sprayed on the soil per cubic meter, and the concentration is 2 multiplied by 10 9 cfu/mL. 1200mL of nutrient solution is sprayed per cubic meter, and the ingredients are 8g of peptone, 6g of saccharomycetes extract, 10g of sodium chloride and the pH value is 7.0. Spraying 100mL of the water per square meter on the surface of the filled soilCompletely infiltrating the Klebsiella with each surface of soil body, and spraying the solution with the concentration of 0.6X10 9 cfu/mL, spreading calcium chloride powder and solid waste powder. And planting white clover seedlings on the upper part of the slope filling soil, wherein the plant spacing is 5cm. And after the plant is covered, spraying water and nutrient solution for primary maintenance.
Test case
In order to further compare the protection effect of the present embodiment and the conventional roadbed slope, the slope height is 5m at the road width of 9m, and the slope 1:1.5, the stability of the slope, the maximum water storage amount and the maximum peak flow occurrence time of the drainage ditch were calculated respectively at a rainfall of 100mm/d, and the results are shown in Table 1. The result shows that the combined ecological slope protection system capable of absorbing pollutants automatically can effectively improve the stability of a slope, can effectively store water under rainfall conditions, and delays the occurrence time of peak flow.
TABLE 1 stability of slopes and Water storage Peak delay Effect under different slope types
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (10)
1. The combined ecological slope protection system capable of absorbing pollutants automatically is characterized by comprising a first ecological layer, a second ecological layer and a retaining wall; the first ecological layer comprises bacterial liquid, fiber materials, solid powder and soil; the second ecological layer comprises bacterial liquid, nutrient solution and soil; the second ecological layer is paved on the surface of the retaining wall; the first ecological layer is laid on the surface of the second ecological layer, and an attachment site is provided for microorganism-induced calcium carbonate.
2. The joint ecological slope protection system of claim 1, further comprising plants planted on the surface of the first ecological layer.
3. The joint ecological slope protection system of claim 2, wherein the plants are spaced apart by 3cm to 20cm.
4. The joint ecological slope protection system of claim 1, wherein the retaining wall material comprises solid waste and/or hazardous waste particles.
5. The combined ecological slope protection system according to claim 5, wherein the particle size of solid waste and/or hazardous waste particles in the retaining wall is less than or equal to 26.5cm; the particle diameter is gradually reduced from top to bottom, moisture is prevented from continuously leaking downwards, a rainwater retention effect is achieved, and peak flow is reduced.
6. The joint ecological slope protection system of claim 1, wherein the bottom of the retaining wall is provided with a plant nutrient solution.
7. The joint ecological slope protection system of claim 1, wherein the first ecological layer has a thickness of 5cm to 15cm.
8. The joint ecological slope protection system of claim 1, wherein the thickness of the second ecological layer is 0.8m-1m.
9. The joint ecological slope protection system of claim 1, wherein the bacterial liquid in the second ecological layer is selected from one or more of bacillus megaterium, bacillus mucilaginosus, bacillus laterosporus, bacillus licheniformis, bacillus subtilis, and streptomyces jingyang.
10. Use of the joint ecological slope protection system of claim 1 in road slope protection.
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| CN116590025A (en) * | 2023-07-18 | 2023-08-15 | 北京助天科技集团有限公司 | Soil anti-seepage agent, application thereof and self-adaptive anti-seepage structure |
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2022
- 2022-12-12 CN CN202211598911.XA patent/CN116145697A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116590025A (en) * | 2023-07-18 | 2023-08-15 | 北京助天科技集团有限公司 | Soil anti-seepage agent, application thereof and self-adaptive anti-seepage structure |
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