CN109440785B - Ecological protection method for soft rock slope soil - Google Patents
Ecological protection method for soft rock slope soil Download PDFInfo
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- CN109440785B CN109440785B CN201811033191.6A CN201811033191A CN109440785B CN 109440785 B CN109440785 B CN 109440785B CN 201811033191 A CN201811033191 A CN 201811033191A CN 109440785 B CN109440785 B CN 109440785B
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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
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
- A01B79/02—Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
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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
- E02D17/202—Securing of slopes or inclines with flexible securing means
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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
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
Abstract
The invention discloses an ecological protection method for soft rock slope soil, which comprises the steps of spraying a layer of curing agent on soft rock, enabling the curing agent to penetrate into the soft rock to prevent the soft rock from weathering and disintegrating, then cleaning a slope surface, leveling, determining the position of an anchor rod according to a design drawing, carrying out drilling construction and installing the anchor rod; laying a wire netting along the slope, tensioning the wire netting, leveling and fixing the wire netting by using an anchor rod; uniformly mixing a planting base material and a curing agent, spraying the mixture to the slope surface in three times, wherein the first spraying thickness is 2-3cm, the total thickness of the three spraying is 11-14cm, and after the base material is sprayed, uniformly spraying the nutrition mud matched with the grass seeds on the base material by using a hydraulic spray seeder; the erosion resistance and the wind erosion resistance of the soil body are improved, the adopted curing agent can interact with the soil, the growth and the development of vegetation are facilitated, and the soil dressing spray seeding can be carried out on the basis of curing soft rock side slopes for ecological protection.
Description
Technical Field
The invention relates to the field of slope protection. In particular to an ecological protection method for soft rock slope soil.
Background
Soft rock is a complex rock mechanical medium with obvious plastic deformation in a specific environment, the basic mechanical theory and the research method of the soft rock are deeply researched by people, and the basic concept of the soft rock, the design of the soft rock engineering side slope and other theoretical problems are not fixed at home and abroad for many years, so that inconvenience is brought to the soft rock engineering side slope. Soft rock engineering refers to rock mass engineering associated with plastically largely deformed engineering rock masses, such as soft rock tunnel engineering, soft rock slope engineering and the like. There are many different interpretations regarding the definition of soft rock, among the descriptive definitions: (1) a soft formation is a loose, weak formation, as opposed to a hard formation. The soft rock stratum has low strength because of short diagenesis time, loose structure and poor cementation degree; (2) soft rock refers to weak, loose, broken, expansive, rheological, high stress and strongly weathered and eroded rock mass; (3) the soft rock stratum refers to a soft, weak, loose and scattered rock stratum which has low strength, large porosity, loose structure, poor cementation degree, obvious influence by cutting or weathering of a structural surface and contains a large amount of clay expansive minerals; (4) the soft rock stratum is a rock mass with low strength. The composition and structure of the surface of the soft rock mass are greatly different from those of the interior of the soft rock mass and are often in a thermodynamic nonequilibrium state, under normal conditions, the speed of the surface of the soft rock mass tending to a thermodynamic equilibrium state is extremely slow, meanwhile, the surface of the soft rock mass also often has various defects, the possibility of elastic deformation and the like, and all uncertain factors influence the surface property of the soft rock mass to a great extent and make the surface property of the soft rock mass different from the composition and structure of the interior stability. In the traditional soft rock slope curing technology, cement concrete mortar and masonry stone slope protection are often sprayed by a hanging net. Although the sprayed cement concrete mortar has good durability and is completely compatible with the side slope, the sprayed cement concrete mortar is far from the ecological environment-friendly concept of highway construction.
Disclosure of Invention
In view of the above, the present invention aims to provide an ecological protection method for soft rock slope soil, which can perform soil dressing spray seeding and ecological protection on the basis of soft rock slope solidification.
The ecological protection method of the soft rock slope soil comprises the following steps:
(1) spraying a layer of curing agent on the soft rock, enabling the curing agent to penetrate into the soft rock to prevent the soft rock from weathering and disintegrating, then cleaning a slope surface, leveling, determining the position of the anchor rod according to a design drawing, performing drilling construction and installing the anchor rod;
(2) laying a wire netting along the slope, tensioning the wire netting, leveling and fixing the wire netting by using an anchor rod;
(3) uniformly mixing a planting base material and a curing agent, spraying the mixture to the slope surface in three times, wherein the first spraying thickness is 2-3cm, the total thickness of the three spraying is 11-14cm, and after the base material is sprayed, uniformly spraying the nutrition mud matched with the grass seeds on the base material by using a hydraulic spray seeder;
the curing agent comprises the following raw materials in parts by weight: 30-40 parts of composite resin, 10-20 parts of chloroprene rubber, 5-10 parts of corn straw, 5-10 parts of polyacrylic acid, 4-8 parts of cement, 4-8 parts of polyethanolamine, 4-8 parts of polyoxyethylene, 2-6 parts of polyvinyl acetate, 2-6 parts of polyaspartic acid, 1-3 parts of ammonium sulfate and 1-3 parts of curing aid;
the composite resin is a mixture of epoxy resin and urea-formaldehyde resin, and the weight ratio of the epoxy resin to the urea-formaldehyde resin is as follows: urea-formaldehyde resin ═ 3: 1;
the corn stalks are treated in the following way: a. dissolving itaconic acid in deionized water to prepare 20% itaconic acid aqueous solution, slowly dropwise adding 20% NaOH solution to obtain 55% -75% neutralization itaconic acid solution, adding acrylamide, N-vinyl pyrrolidone and N, N-methylene bisacrylamide, and stirring until the itaconic acid solution is completely dissolved;
b. washing corn straws with deionized water, drying, crushing to 100-200 meshes, mixing with N, N-dimethylene formamide, performing ultrasonic pretreatment at 40kHz and 300W, adding phytic acid and urea, heating to 50-90 ℃, reacting for 2-6 h, cooling the reaction product to room temperature, filtering, and drying at 45-55 ℃;
c. heating the product obtained in the step b to 75-85 ℃ for gelatinization for 30-40 min, then cooling to 55-65 ℃ to be mixed with the product obtained in the step a, and then adding (NH) with the concentration of 20%4)2S2O8-NaHSO3After polymerization reaction is carried out for 2-3 hours, pouring polymer gel into ethanol for precipitation, washing for 2-3 times, drying at the temperature of 40-60 ℃, then crushing by a crusher, extracting and separating for 8-16 hours by acetone in a Soxhlet extractor, removing homopolymers, drying at the temperature of 50-70 ℃, and crushing;
further, the curing assistant is a mixture of maleic acid, sodium fluoride and potassium bisulfate, and the weight ratio of the maleic acid to the potassium fluoride is as follows: sodium fluoride: potassium hydrogen sulfate ═ 3: 2: 1;
further, the curing agent comprises the following raw materials in parts by weight: 35 parts of composite resin, 15 parts of chloroprene rubber, 7 parts of corn straw, 7 parts of polyacrylic acid, 6 parts of polyethanolamine, 6 parts of polyethylene oxide, 6 parts of cement, 4 parts of polyvinyl acetate, 4 parts of polyaspartic acid, 2 parts of ammonium sulfate and 2 parts of curing assistant.
The invention has the beneficial effects that: the ecological protection method of soft rock slope soil has the advantages that the adopted curing agent has good cohesiveness, curability, fluidity and workability, and after the soil body contacts, the polymer chains are diffused, permeated and wound on the surface of the soil particles and in the pores to form a reticular membrane structure, meanwhile, a large number of functional groups contained on the polymer chain are combined with the soil particles through chemical bond action, so that the water stability of the soil particles is enhanced, the hydrophilic property of the surface of the soil particles is changed, and the effective water resistance is formed, can obtain better compressive strength on the basis of soil compaction, improves the anti-scouring capability and the anti-weathering capability of the soil body, in addition, the curing agent can interact with soil, provides storage and migration ways for vegetation growth factors such as water, gas, fertilizer, heat and the like, is beneficial to the growth and development of vegetation, and can carry out soil dressing and spray seeding on the basis of curing soft rock slopes for ecological protection.
Detailed Description
Example one
The ecological protection method for the soft rock slope soil comprises the following steps:
(1) spraying a layer of curing agent on the soft rock, enabling the curing agent to penetrate into the soft rock to prevent the soft rock from weathering and disintegrating, then cleaning a slope surface, leveling, determining the position of the anchor rod according to a design drawing, performing drilling construction and installing the anchor rod;
(2) laying a wire netting along the slope, tensioning the wire netting, leveling and fixing the wire netting by using an anchor rod;
(3) uniformly mixing a planting substrate and a curing agent, spraying the mixture to a slope surface in three times, wherein the first spraying thickness is 2cm, the total thickness of the three spraying is 11, and after the spraying of the substrate is finished, uniformly spraying the nutrition mud matched with grass seeds on the substrate by using a hydraulic spray seeder;
the curing agent comprises the following raw materials in parts by weight: 30 parts of composite resin, 10 parts of chloroprene rubber, 5 parts of corn straw, 5 parts of polyacrylic acid, 4 parts of cement, 4 parts of polyethanolamine, 4 parts of polyethylene oxide, 2 parts of polyvinyl acetate, 2 parts of polyaspartic acid, 1 part of ammonium sulfate and 1 part of curing assistant;
the composite resin is a mixture of epoxy resin and urea-formaldehyde resin, and the weight ratio of the epoxy resin to the urea-formaldehyde resin is as follows: urea-formaldehyde resin ═ 3: 1;
the corn stalks are treated in the following way: a. dissolving itaconic acid in deionized water to prepare 20% itaconic acid aqueous solution, slowly dropwise adding 20% NaOH solution to obtain 55% neutralization itaconic acid solution, adding acrylamide, N-vinyl pyrrolidone and N, N-methylene bisacrylamide, and stirring until the itaconic acid solution is completely dissolved;
b. washing corn straws with deionized water, drying, crushing to 100 meshes, mixing with N, N-dimethylene formamide, performing ultrasonic pretreatment at 40kHz and 300W, adding phytic acid and urea, heating to 50 ℃ for reaction for 2 hours, cooling the reaction product to room temperature, filtering, and drying at 45 ℃;
c. heating the product obtained in the step b to 75 ℃ for gelatinization for 30min, then cooling to 55 ℃ to mix with the product obtained in the step a, and then adding (NH) with the concentration of 20%4)2S2O8-NaHSO3After polymerization reaction for 2h, the polymer gel is poured into ethanol for precipitation, washed for 2 times and dried at the temperature of 40 ℃, then crushed by a crusher, extracted and separated by acetone in a Soxhlet extractor for 8 hours, and dried and crushed at the temperature of 50 ℃ after homopolymer is removed;
in this embodiment, the curing assistant is a mixture of maleic acid, sodium fluoride, and potassium bisulfate, and the weight ratio of maleic acid: sodium fluoride: potassium hydrogen sulfate ═ 3: 2: 1.
example two
The ecological protection method for the soft rock slope soil comprises the following steps:
(1) spraying a layer of curing agent on the soft rock, enabling the curing agent to penetrate into the soft rock to prevent the soft rock from weathering and disintegrating, then cleaning a slope surface, leveling, determining the position of the anchor rod according to a design drawing, performing drilling construction and installing the anchor rod;
(2) laying a wire netting along the slope, tensioning the wire netting, leveling and fixing the wire netting by using an anchor rod;
(3) uniformly mixing a planting substrate and a curing agent, spraying the mixture to a slope surface in three times, wherein the first spraying thickness is 3cm, the total thickness of the three spraying is 14cm, and after the spraying of the substrate is finished, uniformly spraying the nutrition mud matched with grass seeds on the substrate by using a hydraulic spray seeder;
the curing agent comprises the following raw materials in parts by weight: 40 parts of composite resin, 20 parts of chloroprene rubber, 10 parts of corn straw, 10 parts of polyacrylic acid, 8 parts of cement, 8 parts of polyethanolamine, 8 parts of polyethylene oxide, 6 parts of polyvinyl acetate, 6 parts of polyaspartic acid, 3 parts of ammonium sulfate and 3 parts of curing assistant;
the composite resin is a mixture of epoxy resin and urea-formaldehyde resin, and the weight ratio of the epoxy resin to the urea-formaldehyde resin is as follows: urea-formaldehyde resin ═ 3: 1;
the corn stalks are treated in the following way: a. dissolving itaconic acid in deionized water to prepare 20% itaconic acid aqueous solution, slowly dropwise adding 20% NaOH solution to obtain 75% neutralization itaconic acid solution, adding acrylamide, N-vinyl pyrrolidone and N, N-methylene bisacrylamide, and stirring until the itaconic acid solution is completely dissolved;
b. washing corn straws with deionized water, drying, crushing to 200 meshes, mixing with N, N-dimethylene formamide, performing ultrasonic pretreatment at 40kHz and 300W, adding phytic acid and urea, heating to 90 ℃ for reaction for 6 hours, cooling the reaction product to room temperature, filtering, and drying at 55 ℃;
c. heating the product obtained in the step b to 85 ℃ for gelatinization for 40min, then cooling to 65 ℃ to be mixed with the product obtained in the step a, and then adding (NH) with the concentration of 20%4)2S2O8-NaHSO3After the polymerization reaction is carried out for 3 hours, the polymer gel is poured into ethanol for precipitation, washed for 3 times and dried at the temperature of 60 ℃, then the polymer gel is crushed by a crusher, extracted and separated by acetone in a Soxhlet extractor for 16 hours, and dried and crushed at the temperature of 70 ℃ after homopolymer is removed;
in this embodiment, the curing assistant is a mixture of maleic acid, sodium fluoride, and potassium bisulfate, and the weight ratio of maleic acid: sodium fluoride: potassium hydrogen sulfate ═ 3: 2: 1.
EXAMPLE III
The ecological protection method for the soft rock slope soil comprises the following steps:
(1) spraying a layer of curing agent on the soft rock, enabling the curing agent to penetrate into the soft rock to prevent the soft rock from weathering and disintegrating, then cleaning a slope surface, leveling, determining the position of the anchor rod according to a design drawing, performing drilling construction and installing the anchor rod;
(2) laying a wire netting along the slope, tensioning the wire netting, leveling and fixing the wire netting by using an anchor rod;
(3) uniformly mixing a planting substrate and a curing agent, spraying the mixture to a slope surface in three times, wherein the first spraying thickness is 2cm, the total thickness of the three spraying is 14cm, and after the spraying of the substrate is finished, uniformly spraying the nutrition mud matched with grass seeds on the substrate by using a hydraulic spray seeder;
the curing agent comprises the following raw materials in parts by weight: 30 parts of composite resin, 20 parts of chloroprene rubber, 5 parts of corn straw, 10 parts of polyacrylic acid, 4 parts of cement, 8 parts of polyethanolamine, 4 parts of polyethylene oxide, 6 parts of polyvinyl acetate, 2 parts of polyaspartic acid, 3 parts of ammonium sulfate and 1 part of curing assistant;
the composite resin is a mixture of epoxy resin and urea-formaldehyde resin, and the weight ratio of the epoxy resin to the urea-formaldehyde resin is as follows: urea-formaldehyde resin ═ 3: 1;
the corn stalks are treated in the following way: a. dissolving itaconic acid in deionized water to prepare 20% itaconic acid aqueous solution, slowly dropwise adding 20% NaOH solution to obtain 55% neutralization itaconic acid solution, adding acrylamide, N-vinyl pyrrolidone and N, N-methylene bisacrylamide, and stirring until the itaconic acid solution is completely dissolved;
b. washing corn straws with deionized water, drying, crushing to 200 meshes, mixing with N, N-dimethylene formamide, performing ultrasonic pretreatment at 40kHz and 300W, adding phytic acid and urea, heating to 50 ℃ for reaction for 6 hours, cooling the reaction product to room temperature, filtering, and drying at 45 ℃;
c. heating the product obtained in the step b to 85 ℃ for gelatinization for 30min, then cooling to 65 ℃ to mix with the product obtained in the step a, and then adding (NH) with the concentration of 20%4)2S2O8-NaHSO3After the polymerization reaction 2, the polymer gel is poured into ethanol for precipitation, washed for 3 times and dried at the temperature of 40 ℃, then crushed by a crusher, extracted and separated for 16 hours in a Soxhlet extractor by acetone, and dried and crushed at the temperature of 50 ℃ after homopolymer is removed;
in this embodiment, the curing assistant is a mixture of maleic acid, sodium fluoride, and potassium bisulfate, and the weight ratio of maleic acid: sodium fluoride: potassium hydrogen sulfate ═ 3: 2: 1.
example four
The ecological protection method for the soft rock slope soil comprises the following steps:
(1) spraying a layer of curing agent on the soft rock, enabling the curing agent to penetrate into the soft rock to prevent the soft rock from weathering and disintegrating, then cleaning a slope surface, leveling, determining the position of the anchor rod according to a design drawing, performing drilling construction and installing the anchor rod;
(2) laying a wire netting along the slope, tensioning the wire netting, leveling and fixing the wire netting by using an anchor rod;
(3) uniformly mixing a planting base material and a curing agent, spraying the mixture to the slope surface in three times, wherein the first spraying thickness is 2-3cm, the total thickness of the three spraying is 11-14cm, and after the base material is sprayed, uniformly spraying the nutrition mud matched with the grass seeds on the base material by using a hydraulic spray seeder;
the curing agent comprises the following raw materials in parts by weight: 40 parts of composite resin, 10 parts of chloroprene rubber, 10 parts of corn straw, 5 parts of polyacrylic acid, 8 parts of cement, 4 parts of polyethanolamine, 8 parts of polyethylene oxide, 2 parts of polyvinyl acetate, 6 parts of polyaspartic acid, 1 part of ammonium sulfate and 3 parts of curing assistant;
the composite resin is a mixture of epoxy resin and urea-formaldehyde resin, and the weight ratio of the epoxy resin to the urea-formaldehyde resin is as follows: urea-formaldehyde resin ═ 3: 1;
the corn stalks are treated in the following way: a. dissolving itaconic acid in deionized water to prepare 20% itaconic acid aqueous solution, slowly dropwise adding 20% NaOH solution to obtain 75% neutralization itaconic acid solution, adding acrylamide, N-vinyl pyrrolidone and N, N-methylene bisacrylamide, and stirring until the itaconic acid solution is completely dissolved;
b. washing corn straws with deionized water, drying, crushing to 100 meshes, mixing with N, N-dimethylene formamide, performing ultrasonic pretreatment at 40kHz and 300W, adding phytic acid and urea, heating to 90 ℃ for reaction for 2 hours, cooling the reaction product to room temperature, filtering, and drying at 55 ℃;
c. heating the product obtained in the step b to 75 ℃ for gelatinization for 40min, and then cooling to 55 ℃ to obtain the product obtained in the step aMixing, adding (NH) with a concentration of 20%4)2S2O8-NaHSO3After the polymerization reaction is carried out for 3 hours, the polymer gel is poured into ethanol for precipitation, washed for 2 times and dried at the temperature of 60 ℃, then the polymer gel is crushed by a crusher, extracted and separated by acetone in a Soxhlet extractor for 8 hours, and dried and crushed at the temperature of 70 ℃ after homopolymer is removed;
in this embodiment, the curing assistant is a mixture of maleic acid, sodium fluoride, and potassium bisulfate, and the weight ratio of maleic acid: sodium fluoride: potassium hydrogen sulfate ═ 3: 2: 1.
EXAMPLE five
The ecological protection method for the soft rock slope soil comprises the following steps:
(1) spraying a layer of curing agent on the soft rock, enabling the curing agent to penetrate into the soft rock to prevent the soft rock from weathering and disintegrating, then cleaning a slope surface, leveling, determining the position of the anchor rod according to a design drawing, performing drilling construction and installing the anchor rod;
(2) laying a wire netting along the slope, tensioning the wire netting, leveling and fixing the wire netting by using an anchor rod;
(3) uniformly mixing a planting substrate and a curing agent, spraying the mixture to a slope surface in three times, wherein the first spraying thickness is 3cm, the total thickness of the three spraying is 11cm, and after the spraying of the substrate is finished, uniformly spraying the nutrition mud matched with grass seeds on the substrate by using a hydraulic spray seeder;
the curing agent comprises the following raw materials in parts by weight: 35 parts of composite resin, 12 parts of chloroprene rubber, 9 parts of corn straw, 6 parts of polyacrylic acid, 7 parts of cement, 5 parts of polyethanolamine, 4 parts of polyethylene oxide, 6 parts of polyvinyl acetate, 5 parts of polyaspartic acid, 2 parts of ammonium sulfate and 1 part of curing assistant;
the composite resin is a mixture of epoxy resin and urea-formaldehyde resin, and the weight ratio of the epoxy resin to the urea-formaldehyde resin is as follows: urea-formaldehyde resin ═ 3: 1;
the corn stalks are treated in the following way: a. dissolving itaconic acid in deionized water to prepare 20% itaconic acid aqueous solution, slowly dropwise adding 20% NaOH solution to obtain 60% neutralization itaconic acid solution, adding acrylamide, N-vinyl pyrrolidone and N, N-methylene bisacrylamide, and stirring until the itaconic acid solution is completely dissolved;
b. washing corn straws with deionized water, drying, crushing to 180 meshes, mixing with N, N-dimethylene formamide, performing ultrasonic pretreatment at 40kHz and 300W, adding phytic acid and urea, heating to 80 ℃ for reaction for 5 hours, cooling the reaction product to room temperature, filtering, and drying at 53 ℃;
c. heating the product obtained in the step b to 80 ℃ for gelatinization for 38min, then cooling to 60 ℃ to be mixed with the product obtained in the step a, and then adding (NH) with the concentration of 20%4)2S2O8-NaHSO3After polymerization reaction for 2h, the polymer gel is poured into ethanol for precipitation, washed for 2 times and dried at the temperature of 45 ℃, then crushed by a crusher, extracted and separated by acetone in a Soxhlet extractor for 15 hours, and dried and crushed at the temperature of 55 ℃ after homopolymer is removed;
in this embodiment, the curing assistant is a mixture of maleic acid, sodium fluoride, and potassium bisulfate, and the weight ratio of maleic acid: sodium fluoride: potassium hydrogen sulfate ═ 3: 2: 1.
EXAMPLE six
The ecological protection method for the soft rock slope soil comprises the following steps:
(1) spraying a layer of curing agent on the soft rock, enabling the curing agent to penetrate into the soft rock to prevent the soft rock from weathering and disintegrating, then cleaning a slope surface, leveling, determining the position of the anchor rod according to a design drawing, performing drilling construction and installing the anchor rod;
(2) laying a wire netting along the slope, tensioning the wire netting, leveling and fixing the wire netting by using an anchor rod;
(3) uniformly mixing a planting substrate and a curing agent, spraying the mixture to a slope surface in three times, wherein the first spraying thickness is 2cm, the total thickness of the three spraying is 12cm, and after the spraying of the substrate is finished, uniformly spraying the nutrition mud matched with grass seeds on the substrate by using a hydraulic spray seeder;
the curing agent comprises the following raw materials in parts by weight: 35 parts of composite resin, 15 parts of chloroprene rubber, 7 parts of corn straw, 7 parts of polyacrylic acid, 6 parts of polyethanolamine, 6 parts of polyethylene oxide, 6 parts of cement, 4 parts of polyvinyl acetate, 4 parts of polyaspartic acid, 2 parts of ammonium sulfate and 2 parts of curing assistant;
the composite resin is a mixture of epoxy resin and urea-formaldehyde resin, and the weight ratio of the epoxy resin to the urea-formaldehyde resin is as follows: urea-formaldehyde resin ═ 3: 1;
the corn stalks are treated in the following way: a. dissolving itaconic acid in deionized water to prepare 20% itaconic acid aqueous solution, slowly dropwise adding 20% NaOH solution to obtain 65% neutralization itaconic acid solution, adding acrylamide, N-vinyl pyrrolidone and N, N-methylene bisacrylamide, and stirring until the itaconic acid solution is completely dissolved;
b. washing corn straws with deionized water, drying, crushing to 150 meshes, mixing with N, N-dimethylene formamide, performing ultrasonic pretreatment at 40kHz and 300W, adding phytic acid and urea, heating to 70 ℃ for reaction for 4 hours, cooling the reaction product to room temperature, filtering, and drying at 50 ℃;
c. heating the product obtained in the step b to 80 ℃ for gelatinization for 35min, then cooling to 60 ℃ to be mixed with the product obtained in the step a, and then adding (NH) with the concentration of 20%4)2S2O8-NaHSO3After polymerization reaction for 2h, the polymer gel is poured into ethanol for precipitation, washed for 2 times and dried at the temperature of 50 ℃, then crushed by a crusher, extracted and separated by acetone in a Soxhlet extractor for 12 hours, and dried and crushed at the temperature of 60 ℃ after homopolymer is removed;
in this embodiment, the curing assistant is a mixture of maleic acid, sodium fluoride, and potassium bisulfate, and the weight ratio of maleic acid: sodium fluoride: potassium hydrogen sulfate ═ 3: 2: 1.
the ecological protection method of the soft rock side slope soil of the embodiment is mixed with water and then used for protecting the soft rock side slope, the soil body structure is basically complete after scouring, the surface gully is not obviously developed, and the erosion amount is 0.5-5%; the damage phenomenon of the soft rock surface scour candles without adopting protective measures is obvious, the scour ditches are developed, and the scour rate is as high as 70.2%.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (2)
1. An ecological protection method for soft rock slope soil is characterized in that: the method comprises the following steps:
(1) spraying a layer of curing agent on the soft rock, enabling the curing agent to penetrate into the soft rock to prevent the soft rock from weathering and disintegrating, then cleaning a slope surface, leveling, determining the position of the anchor rod according to a design drawing, performing drilling construction and installing the anchor rod;
(2) laying a wire netting along the slope, tensioning the wire netting, leveling and fixing the wire netting by using an anchor rod;
(3) uniformly mixing a planting base material and a curing agent, spraying the mixture to the slope surface in three times, wherein the first spraying thickness is 2-3cm, the total thickness of the three spraying is 11-14cm, and after the base material is sprayed, uniformly spraying the nutrition mud matched with the grass seeds on the base material by using a hydraulic spray seeder;
the curing agent comprises the following raw materials in parts by weight: 30-40 parts of composite resin, 10-20 parts of chloroprene rubber, 5-10 parts of corn straw, 5-10 parts of polyacrylic acid, 4-8 parts of cement, 4-8 parts of polyethanolamine, 4-8 parts of polyoxyethylene, 2-6 parts of polyvinyl acetate, 2-6 parts of polyaspartic acid, 1-3 parts of ammonium sulfate and 1-3 parts of curing aid;
the composite resin is a mixture of epoxy resin and urea-formaldehyde resin, and the weight ratio of the epoxy resin to the urea-formaldehyde resin is as follows: urea-formaldehyde resin ═ 3: 1; the curing assistant is a mixture of maleic acid, sodium fluoride and potassium bisulfate, and the weight ratio of the maleic acid to the sodium fluoride is as follows: sodium fluoride: potassium hydrogen sulfate ═ 3: 2: 1;
the corn stalks are treated in the following way: a. dissolving itaconic acid in deionized water to prepare 20% itaconic acid aqueous solution, slowly dropwise adding 20% NaOH solution to obtain 55% -75% neutralization itaconic acid solution, adding acrylamide, N-vinyl pyrrolidone and N, N-methylene bisacrylamide, and stirring until the itaconic acid solution is completely dissolved;
b. washing corn straws with deionized water, drying, crushing to 100-200 meshes, mixing with N, N-dimethylene formamide, performing ultrasonic pretreatment at 40kHz and 300W, adding phytic acid and urea, heating to 50-90 ℃, reacting for 2-6 h, cooling the reaction product to room temperature, filtering, and drying at 45-55 ℃;
c. heating the product obtained in the step b to 75-85 ℃ for gelatinization for 30-40 min, then cooling to 55-65 ℃ to be mixed with the product obtained in the step a, and then adding (NH) with the concentration of 20%4)2S2O8-NaHSO3After polymerization reaction for 2-3 h, the polymer gel is poured into ethanol for precipitation, washed for 2-3 times and dried at the temperature of 40-60 ℃, then crushed by a crusher, extracted and separated by acetone in a Soxhlet extractor for 8-16 hours, and dried and crushed at the temperature of 50-70 ℃ after homopolymer is removed.
2. The ecological protection method of soft rock slope soil as claimed in claim 1, wherein: the curing agent comprises the following raw materials in parts by weight: 35 parts of composite resin, 15 parts of chloroprene rubber, 7 parts of corn straw, 7 parts of polyacrylic acid, 6 parts of polyethanolamine, 6 parts of polyethylene oxide, 6 parts of cement, 4 parts of polyvinyl acetate, 4 parts of polyaspartic acid, 2 parts of ammonium sulfate and 2 parts of curing assistant.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811033191.6A CN109440785B (en) | 2018-09-05 | 2018-09-05 | Ecological protection method for soft rock slope soil |
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| CN201811033191.6A CN109440785B (en) | 2018-09-05 | 2018-09-05 | Ecological protection method for soft rock slope soil |
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| CN109440785A CN109440785A (en) | 2019-03-08 |
| CN109440785B true CN109440785B (en) | 2021-08-13 |
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| CN111472371B (en) * | 2020-04-27 | 2021-06-15 | 长沙理工大学 | Comprehensive ecological prevention and control structure and method for easily weathered soft rock high and steep slope |
| CN112482402A (en) * | 2020-11-05 | 2021-03-12 | 河南省恒丰集成技术有限责任公司 | Construction method for greening ecological soil slope protection |
| CN112442996A (en) * | 2020-11-06 | 2021-03-05 | 上海建工七建集团有限公司 | Slope protection structure and method applied to hilly area |
| CN113412696B (en) * | 2021-06-23 | 2022-09-20 | 中南林业科技大学 | Coal gangue slope shallow layer reinforcing and ecological restoration method |
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| CN102926391B (en) * | 2012-11-09 | 2015-02-18 | 北京北林绿源生态技术研究院有限责任公司 | Loess slope ecological protection method |
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