CN115492076A - Method for implementing ecological slope protection by combining urease with fiber and solid waste - Google Patents

Method for implementing ecological slope protection by combining urease with fiber and solid waste Download PDF

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CN115492076A
CN115492076A CN202210988743.9A CN202210988743A CN115492076A CN 115492076 A CN115492076 A CN 115492076A CN 202210988743 A CN202210988743 A CN 202210988743A CN 115492076 A CN115492076 A CN 115492076A
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fiber
urease
combining
spraying
solid waste
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CN115492076B (en
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肖海
张文琪
张伦
王光辉
陈珠宝
代运
徐萌苒
朱鸿宇
郭俊奎
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China Three Gorges University CTGU
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • 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
    • 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
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/02—Receptacles, e.g. flower-pots or boxes; Glasses for cultivating flowers
    • 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
    • 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
    • E02D17/202—Securing of slopes or inclines with flexible securing means
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00—Testing foundations or foundation structures

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Environmental Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Soil Sciences (AREA)
  • Botany (AREA)
  • Hydrology & Water Resources (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)

Abstract

The invention discloses an implementation method of ecological slope protection by combining urease with fiber and solid waste, which comprises the following steps: step 1), removing broken stone garbage on the surface of the side slope for treatment, digging out planting holes at equal intervals, sowing plant seeds into the plant planting holes, and covering and leveling a soil body again; step 2), spreading high-calcium fly ash at plant planting holes, spraying a homogeneous substance prepared by mixing a soybean extract, a carbamide solution, a calcium source solution and fibers in proportion on a slope by using a spraying-seeding machine, and repeatedly spraying the homogeneous substance at intervals; step 3), after the seeds bud, spraying the homogeneous substance on the slope surface again, and paving a layer of non-woven fabric on the surface for maintenance; the invention effectively utilizes waste concrete blocks and high-calcium fly ash by combining fibers, can increase the survival rate of vegetation on the side slope and reduce the soil erosion of the side slope, has wide raw material sources and simple treatment mode, and can be applied to industrial production and popularization.

Description

Method for implementing ecological slope protection by combining urease with fiber and solid waste
Technical Field
The invention relates to the technical field of slope ecological protection engineering, in particular to an implementation method of ecological slope protection by combining urease and fiber with solid waste.
Background
The existing solid waste treatment of waste concrete blocks includes physical and chemical methods. The physical method is to remove the outer layer of cement mortar of the concrete block by external force, wherein the external force is most common in heat grinding, and the method has disadvantages that natural aggregate is damaged by high temperature heating and the performance is reduced. The chemical method comprises the steps of spraying, drying and the like by using chemical substances to improve the surface pore structure so as to achieve the effect of improving the performance of the base material, and has the defects of overlarge economic cost and no practical application value. It is essential to find a safe, effective and environmentally friendly method for treating such solid wastes.
Disclosure of Invention
The invention aims to overcome the defects and provide an implementation method of ecological slope protection by combining urease and fiber with solid waste, the solid waste is combined with a new biological slope fixing technology to achieve the purpose of vegetation slope protection, and the defects of manpower and material resource consumption, long period, unfavorable plant growth, environmental pollution and the like in the prior slope protection technology are overcome.
In order to solve the technical problems, the invention adopts the technical scheme that: an implementation method of an ecological slope protection by combining urease with fiber and solid waste comprises the following steps:
step 1), removing broken stone garbage on the surface of a side slope for treatment, digging out planting holes at equal intervals, sowing plant seeds into the plant planting holes, and covering and leveling a soil body again;
step 2), spreading high-calcium fly ash at plant planting holes, spraying a homogeneous substance prepared by mixing a soybean extract, a carbamide solution, a calcium source solution and fibers in proportion on a slope by using a spraying-seeding machine, and repeatedly spraying the homogeneous substance at intervals;
and 3) after the seeds germinate, spraying the homogeneous substance on the slope again, and paving a layer of non-woven fabric on the surface for maintenance.
Preferably, in the step 1), the plant seeds are Bermuda grass seeds, and are washed clean by pure water, dried in the sun and sowed, wherein the sowing density is 8-12g/m 2 The equal interval between adjacent seeds is 15-20cm, and the distance between adjacent plant planting holes is 15-20cm.
Preferably, the extraction method of the soybean extract in step 2) is as follows: cleaning soybeans with pure water, putting the cleaned soybeans into a wall breaking machine, grinding the soybeans into soybean powder, sieving the soybean powder with a 200-mesh sieve, mixing the soybean powder with distilled water according to a weight ratio of 1.
Preferably, the method for obtaining the high calcium fly ash in the step 2) comprises the following steps: high-calcium fly ash discharged by lignite and subbituminous coal serving as fuels is purchased in a local factory, and sodium hydroxide and the high-calcium fly ash are put into a ball mill for ball milling according to the weight ratio of 0.2 percent to 1.
Preferably, the extraction method of the calcium source solution in the step 2) is as follows: purchasing demolished waste concrete blocks from construction projects of a construction site, crushing the waste concrete blocks by using a grinder, screening the waste concrete blocks by using a standard 1mm geotechnical sieve, mixing the screened concrete with 2mol/L hydrochloric acid according to a ratio of 1.
Preferably, the fibers in the step 2) are wood fibers or palm fibers, the fibers are washed by deionized water with the pH =7, then oil solution treatment is carried out, the ratio of the weight of the oil coating to the weight of the fibers is 0.3%, the thickness of the coating is about 100nm, and finally the fibers are cut to about 1.7-2.2cm by using scissors and mixed in a homogeneous substance.
Preferably, the mixing ratio of the soybean extract, the carbamide solution and the calcium source solution in the step 2) is 1 2 The spreading dosage of the high-calcium fly ash is 600-800g/m 2 。
Preferably, the amount of the soybean extract, the carbamide solution and the calcium source solution sprayed on the slope surface in each time in the step 2) and the step 3) is 1.8-2.2L/m respectively 2 、0.8-1.2L/m 2 And 0.8-1.2L/m 2 。
The invention has the beneficial effects that:
(1) The invention combines urease-induced calcium carbonate precipitation technology with waste concrete blocks and high-calcium fly ash, overcomes the defects that waste concrete blocks in the building industry cannot be treated and the high-calcium fly ash generated by coal combustion in industrial production cannot be utilized in a large scale so as to be discarded and endanger the environment, has low manufacturing cost of raw materials, ensures that molecules can permeate soil bodies with different matrixes after being ground, has the action effect of reaching deeper soil layers and is difficult to block, can degrade redundant urease in the soil bodies along with time, improves various mechanical properties of the slope body under the natural condition without damaging the original slope body, and avoids the harm of small-scale landslide and the like.
(2) The invention combines urease-induced calcium carbonate precipitation technology with fiber, the fiber provides nucleation sites of free urease, so that calcium carbonate crystals are easy to generate, the generated calcium carbonate and soil particles can be attached to the surface of the fiber to form a three-dimensional network structure of fiber-soil particles-calcium carbonate, pores among the soil particles are filled, the calcium carbonate crystals are bridged at two ends of the fiber and part of the surface to bond the fiber and the soil particles, the purposes of integrally transferring stress and limiting the deformation of a soil body under the action of external force are achieved, the stress concentration on the surface of a slope body can be reduced, and the slip resistance of the soil body is enhanced.
(3) The invention utilizes waste concrete blocks as calcium source after treatment, and the generated calcium carbonate crystal comprises the following components: the inside is calcite, the outside is a circulating aggregate crystal of irregular polyhedral blocks, the surfaces are concave-convex staggered, and the calcite and the irregular polyhedral blocks can be mutually attracted in the pores of soil particles to form a compact net structure. NH4+ generated in the process of urease-induced calcium carbonate precipitation reaction enters the interior of a circulating aggregate crystal structure and permanent negative charges generated on the surface of the circulating aggregate crystal structure due to replacement reaction, so that ions with low electricity price and large radius and structural units in soil are attached to soil particles, the soil particles have certain adsorbability, the skeleton group structure of original molecules is enhanced, and the forming of hydrated cementitious substances is promoted by combining with high-calcium fly ash. Compared with a chemical calcium source, the waste concrete calcium source is 1/3 of the cheap production cost, the generation amount of calcium carbonate is not obviously different from that of calcium chloride which is the most common chemical calcium source, and the mechanical properties such as shear strength and the like after reinforcement are not obviously different.
(4) Under the condition that urease catalyzes urea hydrolysis and calcium source solution generates calcium carbonate, the molecular structures of silicon dioxide and aluminum oxide contained in high-calcium fly ash are damaged, covalent bonds are broken, a large number of active unsaturated bonds are generated and combined with calcium ions to generate hydrated gelatinous products, amorphous substances in pore channels are dissolved, the resistance of the pore channels is reduced, cations with large radius are replaced by H + with small radius, the pore diameter is enlarged, the adsorption capacity of the hydrated gelatinous products is improved, the hydrated gelatinous products and fiber-calcium carbonate crystals form a chain structure which takes the ionic bonds and the covalent bonds as main link forces and van der Waals forces as auxiliary link forces, the vector sum of the polarities of all bonds in the chain structure compound is large, so that the larger the intermolecular force is generated, and the wind resistance and the strain relaxation amount of the surface of a soil body can be effectively enhanced.
(5) The high-calcium fly ash is of a porous honeycomb structure, and is combined with a urease-induced calcium carbonate precipitation technology, so that the contact angle of water in soil particle holes of a slope body after meeting water can be increased, the negative pressure of the water in the holes is reduced, the porosity of a reinforced soil body is improved, and the problem of low plant survival rate of the soil body due to high-strength reinforcement is solved.
(6) At the initial stage of application, the shear strength of the side slope is low, the fiber is added as a reinforcing substance, so that the instability problem caused by excessive f-CaO in high-calcium fly ash and the crack width and the interval generated on the side slope surface at the early stage of action by the urease-induced calcium carbonate precipitation technology can be effectively reduced, the disordered arrangement of the fiber can be combined with calcium carbonate crystals to fill the pores of the high-calcium fly ash, so that the combination is tighter, the action durability is improved, the formation of CSH gel in the high-calcium fly ash is promoted, and free water in adsorbed soil is concentrated in gel pores with the diameter of less than 10nm in a hydrated cementitious product generated by the high-calcium fly ash, so that capillary pores are improved, a mutually connected critical pore network is refined, and the deformation of the soil caused by water loss is prevented.
(7) The waste concrete blocks and the high-calcium fly ash are effectively utilized by combining the fibers, so that the survival rate of vegetation on the side slope can be increased, the soil erosion of the side slope is reduced, the raw materials are wide in source, the treatment mode is simple, and the method can be applied to industrial production and popularization.
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FIG. 1 is a graph showing the change of curves of examples and comparative examples of the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments. An ecological slope protection implementation method for combining urease with fiber and solid waste comprises the following steps:
step 1), removing broken stone garbage on the surface of the side slope for treatment, digging out planting holes at equal intervals, sowing plant seeds into the plant planting holes, and covering and leveling a soil body again;
step 2), spreading high-calcium fly ash at plant planting holes, spraying a homogeneous substance prepared by mixing a soybean extract, a carbamide solution, a calcium source solution and fibers in proportion on a slope surface by using a spraying-seeding machine, and repeatedly spraying the homogeneous substance at intervals;
and 3) after the seeds germinate, spraying the homogeneous substance on the slope again, and paving a layer of non-woven fabric on the surface for maintenance.
Preferably, in the step 1), the plant seeds are Bermuda grass seeds, and are washed clean by pure water, dried in the sun and sowed, wherein the sowing density is 8-12g/m 2 The equal interval between adjacent seeds is 15-20cm, and the distance between adjacent plant planting holes is 15-20cm.
Preferably, the extraction method of the soybean extract in step 2) is as follows: cleaning soybeans with pure water, putting the cleaned soybeans into a wall breaking machine, grinding the soybeans into soybean powder, sieving the soybean powder with a 200-mesh sieve, mixing the soybean powder with distilled water according to a weight ratio of 1.
Preferably, the method for obtaining the high calcium fly ash in the step 2) comprises the following steps: high-calcium fly ash discharged by brown coal and sub-bituminous coal serving as fuels is purchased in a local factory, and sodium hydroxide and the high-calcium fly ash are put into a ball mill for ball milling according to the weight ratio of 0.2 to 1.
Preferably, the extraction method of the calcium source solution in the step 2) comprises the following steps: purchasing demolished waste concrete blocks from construction projects of a construction site, crushing the waste concrete blocks by using a grinder, screening the waste concrete blocks by using a standard 1mm geotechnical sieve, mixing the screened concrete with 2mol/L hydrochloric acid according to a ratio of 1.
Preferably, the fibers in the step 2) are wood fibers or palm fibers, the fibers are washed by deionized water with the pH =7, then oil solution treatment is carried out, the ratio of the weight of the oil coating to the weight of the fibers is 0.3%, the thickness of the coating is about 100nm, and finally the fibers are cut to about 1.7-2.2cm by using scissors and mixed in a homogeneous substance. In this example, washing can increase cellulose of the fiber, oiling treatment can increase the fracture resistance of the fiber, and the oil loss during the mixing process can be ignored due to the strong adhesion of the fiber surface, and the oiling agent is epoxidized soybean oil.
Preferably, the mixing ratio of the soybean extract, the carbamide solution and the calcium source solution in the step 2) is 1 2 The spreading dosage of the high-calcium fly ash is 600-800g/m 2 。
Preferably, the amount of the soybean extract, the carbamide solution and the calcium source solution sprayed on the slope surface in each time in the step 2) and the step 3) is 1.8-2.2L/m respectively 2 、0.8-1.2L/m 2 And 0.8-1.2L/m 2 。
The following will specifically explain the implementation process and the implementation effect of the method by combining the examples and comparative examples:
the following is a description of specific embodiments:
example 1 (inventive)
Taking a sample plot of 5m multiplied by 5m on a No. 1 side slope with the side slope height of 25m and the slope of 30 degrees of a certain hydropower station side slope greening construction site as an example, removing garbage such as broken stones on the side slope in the first step, digging seed planting holes at intervals of 20cm in the second step, and sowing Bermuda grass seeds cleaned by deionized water with the sowing density of 10g/m 2 Step three, firstly, the surface of the sample area is 750g/m 2 Spreading high calcium fly ash, and spray-seeding homogeneous substance composed of soybean extract, carbamide solution, calcium source solution and palm fiber with concentration of 2.0L/m every 3 days 2 、1.0L/m 2 、1.0L/m 2 And 8g/m 2 Spraying the homogeneous substance composed of semen glycines extractive solution, carbamide solution, calcium source solution and palm fiber with concentration of 2.0L/m respectively 2 、1.0L/m 2 、1.0L/m 2 And 8g/m 2 Before each injection, the vegetation coverage, surface shear strength, porosity, organic matter, soil separating capacity and the number of bermuda grass seeds per square meter are measured.
Comparative example 1 (without high calcium fly ash)
Taking a sample plot of 5m multiplied by 5m on a 2# side slope with the slope height of more than 25m and the slope of 30 degrees of a slope greening construction site of a hydropower station as an example, removing garbage such as broken stones on the side slope in the first step, digging seed planting holes at intervals of 20cm in the second step, sowing Bermuda grass seeds cleaned by deionized water, and sowing the seeds with the density of 10g/m 2 Thirdly, spraying and sowing the homogeneous substances consisting of the soybean extract, the carbamide solution, the calcium source solution and the palm fiber by using a spraying and sowing machine every 3 days, wherein the concentration of the homogeneous substances is 2.0L/m respectively 2 、1.0L/m 2 、1.0L/m 2 And 8g/m 2 Spraying homogeneous substance composed of semen glycines extractive solution, carbamide solution, calcium source solution and palm fiber at concentration of 2.0L/m 2 、1.0 L/m 2 、1.0L/m 2 And 8g/m 2 . Before each perfusion, the vegetation coverage of the soil body, the surface shear strength, the porosity, the organic matter, the soil separation capacity and the number of bermudagrass seeds per square meter are measured.
Comparative example 2 (non-concrete calcium source solution)
Taking a sample plot of 5m multiplied by 5m on a No. 1 side slope with the side slope height of 25m and the slope of 30 degrees of a certain hydropower station side slope greening construction site as an example, removing garbage such as broken stones on the side slope in the first step, digging seed planting holes at intervals of 20cm in the second step, and sowing Bermuda grass seeds cleaned by deionized water with the sowing density of 10g/m 2 Step three, firstly, the surface of the sample land is 750g/m 2 The high calcium fly ash is spread on the mixture, and the homogeneous matter comprising soybean extract, carbamide solution and palm fiber is sprayed on the mixture by a spraying-sowing machine every 3 days, the concentration of the homogeneous matter is respectively 2.0L/m 2 、1.0L/m 2 And 8g/m 2 Spraying homogeneous substance composed of soybean extractive solution, carbamide solution and palm fiber in concentration of 2.0L/m respectively 2 、1.0L/m 2 And 8g/m 2 Before each perfusion, the vegetation coverage, the surface shear strength, the porosity, the organic matter, the soil separation capacity and the number of bermuda grass seeds per square meter are measured.
COMPARATIVE EXAMPLE 3 (without fiber)
Taking a sample plot of 5m multiplied by 5m on a 4# side slope with the height of more than 25m and the slope of 30 degrees of a side slope greening building site of a certain hydropower station as an example, removing garbage such as broken stones on the side slope in the first step, digging seed planting holes at intervals of 20cm in the second step, sowing bermuda grass seeds cleaned by deionized water, and sowing the seeds with the density of 10g/m 2 Step three, firstly, the surface of the sample area is 750g/m 2 Spraying high calcium fly ash, spraying homogeneous substance composed of semen glycines extractive solution, carbamide solution and calcium source solution at intervals of 3 days, with concentration of 2.0L/m 2 、1.0L/m 2 And 1.0L/m 2 Spraying homogeneous substance composed of semen glycines extractive solution, carbamide solution and calcium source solution with concentration of 2.0L/m respectively on the sample plot after seed germination 2 、1.0L/m 2 And 1.0L/m 2 . Before each perfusion, the vegetation coverage of the soil body, the surface shear strength, the porosity, the organic matter, the soil separation capacity and the number of bermudagrass seeds per square meter are measured.
COMPARATIVE EXAMPLE 4 (blank)
Taking a sample plot of 5m multiplied by 5m on a 3# side slope with the slope height of more than 25m and the slope of 30 degrees of a slope greening construction site of a hydropower station as an example, removing garbage such as broken stones on the side slope in the first step, digging seed planting holes at intervals of 20cm in the second step, sowing Bermuda grass seeds cleaned by deionized water, and sowing the seeds with the density of 10g/m 2 Step three, firstly, the surface of the sample area is 750g/m 2 Spreading high calcium fly ash, spray-seeding homogeneous substance composed of soybean extract and carbamide solution with concentration of 2.0L/m every 3 days 2 And 1.0L/m 2 Spraying a homogeneous mixture of soybean extractive solution and carbamide solution at a concentration of 2.0L/m after seed germination 2 And 1.0L/m 2 Before each injection, the vegetation coverage, surface shear strength, porosity, organic matter, soil separating capacity and the number of bermuda grass seeds per square meter are measured.
The above examples and comparative examples were compared and the data are as follows:
Figure BDA0003803036240000071
Figure BDA0003803036240000072
test methods and reference standards: calculating the percentage of the ratio of the vertical projection area to the sample area of the overground part of the plant community or each individual by adopting a sampling needling method; the surface shear strength test is measured by a micro surface cross shear apparatus according to the standard of geotechnical test methods (GB/T50123-1999); porosity is determined according to geotechnical test method standard (GB/T50123-1999) using the density test method; measuring organic matters by adopting a flow analyzer; and the soil separation capacity is obtained by calculating the mass difference before and after the flushing test weighing is carried out after the sampling is carried out by adopting a cutting ring method.
It can be seen from the above comparative data that the vegetation coverage in 30 days of the example is improved by 2.62 times compared with the comparative example, the shear strength of the soil surface is increased by 12kPa, the porosity is reduced by 12.2%, the content of organic matters in the soil is improved by about 3 times to the maximum, the index of the soil separation capacity representing the impact resistance of the soil is reduced by 9.74 times, the smaller the soil separation capacity is, the better the impact resistance of the soil is, and the number of canine tooth plants per square meter is also greatly increased compared with the comparative group. The implementation method of the ecological slope protection by combining urease with fiber and solid waste can obviously improve the performances such as the scouring resistance and the shear strength of the soil body, the improvement of the content of organic matters provides an excellent environment for the better growth of vegetation on the side slope, the existence of the vegetation enhances the protection effect on the side slope, and the root-soil complex formed by the plant root system and the soil body obviously improves the capabilities of resisting surface erosion, furrow erosion and rainwater erosion of the side slope.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.

Claims (8)

1. An implementation method of ecological slope protection by combining urease with fiber and solid waste is characterized in that: it comprises the following steps:
step 1), removing broken stone garbage on the surface of a side slope for treatment, digging out planting holes at equal intervals, sowing plant seeds into the plant planting holes, and covering and leveling a soil body again;
step 2), spreading high-calcium fly ash at plant planting holes, spraying a homogeneous substance prepared by mixing a soybean extract, a carbamide solution, a calcium source solution and fibers in proportion on a slope surface by using a spraying-seeding machine, and repeatedly spraying the homogeneous substance at intervals;
and 3) after the seeds germinate, spraying the homogeneous substance on the slope again, and paving a layer of non-woven fabric on the surface for maintenance.
2. The method for implementing ecological slope protection by combining urease with fiber and solid waste, according to claim 1, is characterized in that: in the step 1), the plant seeds are Bermuda grass seeds, are washed clean by pure water, dried in the sun and sowed, and the sowing density is 8-12g/m 2 The equal interval between adjacent seeds is 15-20cm, and the distance between adjacent plant planting holes is 15-20cm.
3. The method for implementing ecological slope protection by combining urease with fiber and solid waste according to claim 1, wherein the method comprises the following steps: the extraction method of the soybean extract in the step 2) comprises the following steps: cleaning soybeans with pure water, grinding the cleaned soybeans into soybean powder in a wall breaking machine, sieving the soybean powder with a 200-mesh sieve, mixing the soybean powder with distilled water according to a weight ratio of 1.
4. The method for implementing ecological slope protection by combining urease with fiber and solid waste, according to claim 1, is characterized in that: the method for obtaining the high-calcium fly ash in the step 2) comprises the following steps: high-calcium fly ash discharged by lignite and subbituminous coal serving as fuels is purchased in a local factory, and sodium hydroxide and the high-calcium fly ash are put into a ball mill for ball milling according to the weight ratio of 0.2 percent to 1.
5. The method for implementing ecological slope protection by combining urease with fiber and solid waste, according to claim 1, is characterized in that: the extraction method of the calcium source solution in the step 2) comprises the following steps: purchasing demolished waste concrete blocks from construction projects of a construction site, crushing the waste concrete blocks by using a grinder, screening the waste concrete blocks by using a standard 1mm geotechnical sieve, mixing the screened concrete with 2mol/L hydrochloric acid according to a ratio of 1.
6. The method for implementing ecological slope protection by combining urease with fiber and solid waste according to claim 1, wherein the method comprises the following steps: selecting wood fiber or palm fiber as the fiber in the step 2), washing the fiber by using deionized water with pH =7, then performing oil solution treatment, wherein the weight ratio of the oil coating to the fiber is 0.3%, the thickness of the coating is about 100nm, and finally cutting the fiber to about 1.7-2.2cm by using scissors and mixing the cut fiber in a homogeneous substance.
7. The method for implementing ecological slope protection by combining urease with fiber and solid waste, according to claim 1, is characterized in that: the mixing ratio of the soybean extract, the carbamide solution and the calcium source solution in the step 2) is 1 2 The spreading dosage of the high-calcium fly ash is 600-800g/m 2 。
8. The method for implementing ecological slope protection by combining urease with fiber and solid waste according to claim 1 or 7, wherein the method is characterized in that: the amounts of the soybean extract, the carbamide solution and the calcium source solution sprayed on the slope surface in the step 2) and the step 3) are respectively 1.8-2.2L/m 2 、0.8-1.2 L/m 2 And 0.8-1.2L/m 2 。
CN202210988743.9A 2022-08-17 2022-08-17 Ecological slope protection implementation method combining urease with fiber and solid waste Active CN115492076B (en)

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JP2004305186A (en) * 2003-04-02 2004-11-04 Ryoji Tatewana Method for collecting bacteria/microorganism living in soil and use of the same for tree planting, feed and soil improvement
CN103966126A (en) * 2014-04-25 2014-08-06 北京山地生态科技研究所 Bacillus subtilis, microbial agent and application of bacillus subtilis and microbial agent in ecological restoration
CN111837528A (en) * 2020-08-14 2020-10-30 南京林业大学 Bare rock spray-seeding green-recovering structure and construction method
CN113316989A (en) * 2021-06-01 2021-08-31 三峡大学 Method for realizing slope greening by combining vegetation concrete with self-growing azotobacter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004305186A (en) * 2003-04-02 2004-11-04 Ryoji Tatewana Method for collecting bacteria/microorganism living in soil and use of the same for tree planting, feed and soil improvement
CN103966126A (en) * 2014-04-25 2014-08-06 北京山地生态科技研究所 Bacillus subtilis, microbial agent and application of bacillus subtilis and microbial agent in ecological restoration
CN111837528A (en) * 2020-08-14 2020-10-30 南京林业大学 Bare rock spray-seeding green-recovering structure and construction method
CN113316989A (en) * 2021-06-01 2021-08-31 三峡大学 Method for realizing slope greening by combining vegetation concrete with self-growing azotobacter

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