CN103924606A - Basalt fiber and polyvinyl alcohol combined anti-erosion construction protection method for silt slope - Google Patents
Basalt fiber and polyvinyl alcohol combined anti-erosion construction protection method for silt slope Download PDFInfo
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Abstract
The invention provides a basalt fiber and polyvinyl alcohol combined anti-erosion construction protection method for a silt slope, and relates to the technical field of geotechnical engineering slope protection. The invention discloses the three-layer slope anti-erosion protection layer and a design and construction method thereof. The protection layer comprises silt, basalt fibers and modified polyvinyl alcohol mixed soil. A surface protection layer is a common spray-seeding or earth spraying grass planting layer with the thickness ranging from 0.5 cm to 2 cm; a middle protection layer is a mixed layer comprising the silt, basalt fibers and modified polyvinyl alcohol containing a vegetable nutrient solution, the thickness of the mixed layer ranges from 2 cm to 5 cm, and the lengths of the basalt fibers range from 6 mm to 20 mm; a bottom protection layer is a mixed layer comprising the silt and basalt fibers, the thickness of the mixed layer ranges from 5 cm to 15 cm, and the lengths of the basalt fibers range from 20 mm to 30 mm. The method integrates multiple anti-erosion technologies including grass planting, reinforcement and curing agents, mainly aims to eliminate the phenomenon that water and soil loss is prone to occurring on the silt slope under rainfall erosion situations, and has the advantages of being capable of meeting the requirements for low carbon and environment protection, convenient and quick to construct, low in manufacturing cost, and capable of integrating reinforcement, erosion resistance and greening.
Description
Technical field
The present invention relates to a kind of basalt fibre and combine antiscour side slope protection technology and construction method thereof with polyvinyl alcohol, belong to geotechnical engineering side slope protection technical field.Mainly for powdery soil slope, under rainfall erosion condition, easily there is soil erosion phenomenon, thereby cause the situation of erosion damage, especially in the protection of silt side slope of embankment, construct convenient by greening and the antiscour more aobvious advantage that unites two into one.
Background technology
The erosion damage on side slope surface is one of modal disease of powdery soil slope.The granularmetric composition of silt be take powder and fine sand as main, and clay content is few, so the specific area of silt is little, and ion-exchange is little.Liquid limit and the index of plasticity of silt are little, when dry easily crushed, airborne dust is large, easy-formation not, construction rolling easily produces imbricate and passes and stratification; During immersion, easily drenched very soon again, there is the native feature of stream, erosion resistance ability.Therefore under condition of raining, the slope runoff of powdery soil slope can wash away the domatic top layer soil body, and then affects the long-time stability of powdery soil slope.
1., plant protection side slope scouring-resistance means of defence is broadly divided into four classes; 2., bricklaying+plant protection; 3., Earthworking reinforced bar+plant protection; 4., curing compound+plant protection.Plant protection, comprises kind of a grass, plants grass, turfing and tree planting etc.The quick industrialized construction technology of grass planting is mainly Seed spraying technology, adopts the hydraulic pressure method of sowing grass seeds by duster, and the selection of grass seeds is mainly according to local soil and weather conditions, selects well developed root system, resistance to low level management, drought-enduring kind.Seed spraying technology is used special-purpose plant equipment, by seed, and soil moved in to improve the original, water-keeping material, an agent, stabilizing agent, bulk material, fertilizer etc. mixes, and spray is placed in side slope surface, makes soil moved in to improve the original formation table soil under stable state.1., utilize root system of plant to form reinforcement fixation the antiscour effect of grass planting is mainly:; 2., plant leaf can reduce in rainfall raindrop to domatic impact strength; 3., strengthen rainfall infiltration amount, the scouring force of reduction overland flow.The shortcoming of grass planting protection is solid native depth as shallow, Gu native weak strength.Bricklaying+plant protection, bricklaying protection adopts the materials such as mortar flag stone, cast-in-situ concrete, French interlocking type concrete precast block, Japanese rectangle concrete precast block on side slope surface, to carry out graticule mesh laying.Plant protection carries out the plant protections such as grass planting, tree planting in the graticule mesh neutral gear of bricklaying protection.These safeguard procedures are the most general real project using, and effect is best.That but shortcoming is cost is high, construction tired, silt difficult closely knit, structure is easy to crack.Earthworking reinforced bar+plant protection is mainly three-dimensional earthwork grass planting technology.Being applicable to slope gradient delays in cut slope and the ratio of slope of 1: 1 and delays the side slope of embankment in 1: 1.5.Three-dimensional earthwork is selected layer stereo geotechnique gauze pad, and in three-dimensional earthwork bag, backfill adopts local cohesive soil, adds appropriate fertilizer, water-loss reducer, cementing agent, guarantees its permeability, water retention and caking property, is beneficial to careless bank up the roots of seedlings growth.The Main Function of reinforcement is: muscle material and native rubbing action have limited native distortion, have improved the shear strength of the soil body.Shortcoming is to tend to occur along the sliding rupture that washes away between grid and basic unit's face.Curing compound+plant protection, adds the different curing compound such as traditional inorganic solidification agent, ion curing compound, organic curing agent in silt the inside, to reaching the antiscour intensity that improves silt.The domatic multiple green engineering that still adopts plant protection.Shortcoming: 1., traditional curing compound, be unfavorable for mixing use with plant protection, do not meet green requirement; 2., ion curing compound, there is certain pollution effect, do not meet environmental requirement; 3., organic curing agent, poor effect, cost is high.
In sum, powdered road base side slope is very easily by rain drop erosion, and general protection method effect is undesirable.After plant reinforcement protection, domaticly still destroy; Bricklaying protection is only applicable to dry slope, large to amount of precipitation, dryly wetly change area frequently and should not use, and construction has certain difficulty, and expense is higher; And for spray soil solidification stabilizing agent grass planting method, be not cannot environment protection standard, be exactly to apply too high being difficult to of cost.
Summary of the invention
Technical problem: the object of the invention is to merge grass planting, reinforcement, the multiple antiscour technological means of curing compound, proposed a kind ofly to meet low-carbon green environmental protection, construct convenient, cheap, take into account the basalt fibre that increases steady, antiscour, greening integrated powdery soil slope and combine antiscour guard technology and construction method thereof with polyvinyl alcohol.
Technical scheme: the basalt fibre of powdery soil slope of the present invention is combined antiscour protection construction method and comprised design and construction two parts with polyvinyl alcohol, concrete steps are as follows:
The first step: collect the 10 years above rainfall observational datas in weather station in engineering area, calculate the average rainfall intensity in design recurrence interval and rainfall duration according to 9.1.6 bar in < < highway drainage design specifications JTG/T D33-2012 > >; If lack rainfall observational data, can, according to 9.1.7 bar in < < highway drainage design specifications JTG/T D33-2012 > >, calculate rainfall intensity;
Second step: prevent and treat 2.0.3 in standard GB/T50434-2007 > > clause according to the water and soil conservation of < < development & construction project, in conjunction with the gradient of intending carrying out safeguard procedures side slope, according to < < classification of soil erosion grade scale SL190-96 > > 4.1.2, determine corresponding intend carrying out the engineering slope Grading index of soilerosion intensity of safeguard procedures and corresponding allowing average soil erosion modulus and allow average Soil loss thickness, These parameters is the controlling indicator of antiscour guard technology requirement,
The 3rd step: the basalt fibre of powdery soil slope combines antiscour guard technology with polyvinyl alcohol and construction method adopts three layers of stratification and injection or the domatic antiscour overcoat of the construction that paves, and comprises top layer overcoat: common sowing grass seeds by duster or alien earth sparging grass planting layer, middle level overcoat: silt, short basalt fiber, containing the mixed layer of the modified polyvinylalcohol of plant nutrition liquid, bottom overcoat: the mixed layer of silt, basalt long fiber, according to the plan of second step, carry out the controlling indicator of allowing soil erosion intensity of safeguard procedures side slope, tentatively draft 5 groups of protection effect degree different by fiber, mix ratio, modified polyvinylalcohol mixes ratio, and the protection Design scheme of each overcoat thickness composition, according to the requirement of < < development & construction project conservation technology standard GB50433-2008 > > 5.7.6, in conjunction with rainfall intensity that the first step obtains, according to < < development & construction project conservation technology standard GB50433-2008 > > 5.9.10, 5.9.11, 5.9.12, 5.9.13 in, rainfall or artificial rainfall runoff plot test are carried out in listed requirement, test obtains soil erosion modulus and the Soil loss thickness under above-mentioned each scheme, and compare with allowing controlling value, acquisition meets the protection Design scheme of antiscour condition, if cannot meet antiscour condition, according to result of the test, reformulating scheme tests,
The 4th step: the slope stability of carrying out whole protective facing for the protection Design scheme that meets antiscour condition is checked, each scheme satisfying condition is carried out to corresponding silt and mix ratio with fiber, modified polyvinylalcohol mix than shear strength test, to obtain respective intensities index, in conjunction with each overcoat thickness, according to highway subgrade design specifications JTG D30-2004, carrying out the slope stability of whole protective facing checks, check by rear and finally select final design scheme according to economy, if check, do not pass through, according to stability result of calculation, suitably increase mix than and overcoat thickness, re-start check, until meet stability requirement,
The 5th step: the soil fertility index based on Project Areas silt, selected according to highway environment protection design specifications JT2006-98 is common sowing grass seeds by duster or alien earth sparging grass planting scheme, the common layer 0.5cm left and right of sowing grass seeds by duster, alien earth sparging layer 2cm left and right; Construction part:
The 6th step: guarantee that powdery soil slope is stability, should carry out again the construction of antiscour overcoat by after date when side slope early stage stagnating one section after treatment measures during construction, guarantee that the sedimentation and deformation of side slope completes before construction;
The 7th step: clear up domaticly, clear up the side slope surface of works area, clear up and domaticly should guarantee domatic camber average out to ± 10cm, forbid occurring counter-slope;
The 8th step: unwrapping wire, in strict accordance with the requirement of design working drawing, by design laying depth, region, carry out unwrapping wire, require unwrapping wire accurate;
The 9th step: bottom overcoat paves, according to design mixture proportion, carries out mix preparation to silt, basalt fibre composite soil at the construction field (site); Slope surface treatment, scratches processing to domatic, and sprays layer of polyethylene polyol curing agent liquid; Before basic unit's domatic injection polyvinyl alcohol liquid is not dry, according to design thickness, carry out paving of composite soil, in paving, carry out three times top-down beating compactings, guarantee composite soil degree of compaction and the density of design;
The tenth step: middle level overcoat sprays, and according to design mixture proportion, at the construction field (site) silt, basalt fibre, polyvinyl alcohol mixing soil is carried out to mix preparation; Slope surface treatment, scratches processing to domatic, and sprays layer of polyethylene polyol curing agent liquid; Before basic unit's domatic injection polyvinyl alcohol liquid is not dry, according to design thickness, carry out the injection of composite soil, in injection, control pressure and the speed of spraying, guarantee density of mixed soil and the slope leveling degree of design;
The 11 step: common the sowing grass seeds by duster determining according to design scheme carried out grass planting construction with alien earth sparging method, the common constructure scheme of sowing grass seeds by duster is as follows: 1. slope surface treatment: roadbed slope is scratched to processing, be convenient to fertilising, make seed be combined with roadbed slope tightr simultaneously; 2. fertilising: according to the fertility of soil, apply in 48h prior to seeding; 3. domatic watering: before sowing grass seeds by duster, tackle domatic watering, keep domatic dampness, be beneficial to seed germination; 4. the preparation of sowing grass seeds by duster: stocked the materials such as seed, adhesive, seed should be through purity check and germination percentage test, and carries out vernalization and prepare before gushing; 5. hydraulic pressure is sowed grass seeds by duster: will after seed, adhesive and the blending of modified polyvinylalcohol liquid, sow grass seeds by duster uniformly rapidly on domatic; 6. cover nonwoven: tighten limit mouth, with bamboo nail, bury with soil at two, overlapping 10cm between nonwoven; 7. maintenance: do not rain and water to keep ground moistening every day after sowing grass seeds by duster as; while growing to setting height to seedling; take nonwoven off; before taking off, should suitably temper dew seedling; forbid that fine day takes off cloth suddenly; after Cheng Ping, can reduce gradually the number of times watering, alien earth sparging constructure scheme is according to highway environment protection design specifications JT2006-98, alien earth sparging green material application standard JT2002-45, alien earth sparging greening Foundation Design material standard JT2002-41, spraying and seeding afforesting construction technology rules JT2002-127.
Wherein, in the 3rd step: common sowing grass seeds by duster or alien earth sparging grass planting bed thickness 0.5～2cm; Middle level overcoat: silt, the thick 6mm～20mm of short basalt fiber; The mixing bed thickness 2～5cm that contains the modified polyvinylalcohol of plant nutrition liquid; Bottom overcoat: mixing bed thickness 5～15cm of silt, the thick 20mm～30mm of basalt long fiber.
Beneficial effect: the present invention adopts above technical scheme, possesses following advantage compared with prior art:
1., this technological incorporation multipath antiscour preventive means, top layer has played that reduction runoff washes away, rhizome fixation; Reinforcement silt structure has been played in middle level, increases aggregate cementation, reduces to corrode infiltration capacity, improves domatic soil body tension and shear strength; Distribution that basalt fibre is omnidirectional prevents from washing away loss slippage along stationary plane table soil; Bottom has played the antiscour of effective connection topsoil and deep soil and has sheared intermal force, and simultaneously unoriented fiber distributes and can effectively prevent from washing away loss slippage along stationary plane table soil.
2., basalt fibre refines from basalt stone material, modified polyvinylalcohol is the high-molecular organic material of recommendation in National 863 plan " new material and low-cost technology of preparing for sand-fixing vegetation ", above-mentioned material all meets low-carbon (LC), green, environmental protection, is difficult for aging technical requirements, and basalt fibre and polyvinyl alcohol are all industrial materials, cheap, be easy to large-scale application and promote;
3., the three-layer protection body of this technology all adopts the form of construction work that paves and spray slurries, construction cost is low and convenient.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and case study on implementation, the invention will be further described.
The basalt fibre of Fig. 1 powdery soil slope is combined antiscour guard technology generalized section with polyvinyl alcohol.
Fig. 2 is the soil layer schematic diagram that the present invention is applied to side slope.
In figure, have: road surface 1, roadbed side slope 2, roadbed 3, lawn 4, silt+short basalt fiber+containing nutrient solution modified polyvinylalcohol 5, silt+basalt long fiber 6, basic unit's silt 7.
The specific embodiment
Below in conjunction with 1 pair of technical scheme of the present invention of accompanying drawing, be elaborated:
The basalt fibre of powdery soil slope is combined antiscour guard technology and construction method thereof with polyvinyl alcohol, its feature mainly comprises design and construction two large divisions, and concrete steps are as follows:
The basalt fibre of powdery soil slope is combined an antiscour protection construction method with polyvinyl alcohol, it is characterized in that the method comprises design and construction two parts, and concrete steps are as follows:
The first step: collect the 10 years above rainfall observational datas in weather station in engineering area, calculate the average rainfall intensity in design recurrence interval and rainfall duration according to 9.1.6 bar in < < highway drainage design specifications JTG/T D33-2012 > >; If lack rainfall observational data, can, according to 9.1.7 bar in < < highway drainage design specifications JTG/T D33-2012 > >, calculate rainfall intensity.
Second step: prevent and treat 2.0.3 in standard GB/T50434-2007 > > clause according to the water and soil conservation of < < development & construction project, in conjunction with the gradient of intending carrying out safeguard procedures side slope, according to < < classification of soil erosion grade scale SL190-96 > > 4.1.2, determine corresponding intend carrying out the engineering slope Grading index of soilerosion intensity of safeguard procedures and corresponding allowing average soil erosion modulus and allow average Soil loss thickness.These parameters is the controlling indicator of antiscour guard technology requirement.
The 3rd step: the basalt fibre of powdery soil slope combines antiscour guard technology with polyvinyl alcohol and construction method adopts three layers of stratification and injection or the domatic antiscour overcoat of the construction that paves, and comprises top layer overcoat: common sowing grass seeds by duster or alien earth sparging grass planting layer (0.5～2cm); Middle level overcoat: silt, short basalt fiber (6mm～20mm), containing the mixed layer (2～5cm) of the modified polyvinylalcohol of plant nutrition liquid; Bottom overcoat: the mixed layer (5～15cm) of silt, basalt long fiber (20mm～30mm).According to the plan of second step, carry out the controlling indicator of allowing soil erosion intensity of safeguard procedures side slope, tentatively draft 5 groups of protection effect degree different by fiber, mix ratio, modified polyvinylalcohol mixes ratio, and the protection Design scheme of each overcoat thickness composition, according to the requirement of < < development & construction project conservation technology standard GB50433-2008 > > 5.7.6, in conjunction with rainfall intensity that the first step obtains, according to < < development & construction project conservation technology standard GB50433-2008 > > 5.9.10, 5.9.11, 5.9.12, 5.9.13 in, rainfall or artificial rainfall runoff plot test are carried out in listed requirement, test obtains soil erosion modulus and the Soil loss thickness under above-mentioned each scheme.And compare with allowing controlling value, obtain the protection Design scheme that meets antiscour condition.If cannot meet antiscour condition, according to result of the test, reformulate scheme and test.
The 4th step: the slope stability of carrying out whole protective facing for the protection Design scheme that meets antiscour condition is checked.To each scheme satisfying condition carry out corresponding silt and fiber mix ratio, modified polyvinylalcohol mix than shear strength test, to obtain respective intensities index.In conjunction with each overcoat thickness, according to highway subgrade design specifications JTG D30-2004, carry out the slope stability of whole protective facing and check.Check by rear and finally select final design scheme according to economy.If check, do not pass through, according to stability result of calculation, suitably increase mix than and overcoat thickness, re-start check, until meet stability requirement.
The 5th step: the soil fertility index based on Project Areas silt, selected according to highway environment protection design specifications JT2006-98 is common sowing grass seeds by duster or alien earth sparging grass planting scheme, the common layer 0.5cm left and right of sowing grass seeds by duster, alien earth sparging layer 2cm left and right; Construction part:
The 6th step: guarantee that powdery soil slope is stability, should carry out again the construction of antiscour overcoat by after date when side slope early stage stagnating one section after treatment measures during construction, guarantee that the sedimentation and deformation of side slope completes before construction;
The 7th step: clear up domaticly, clear up the side slope surface of works area, clear up and domaticly should guarantee domatic camber average out to ± 10cm, forbid occurring counter-slope;
The 8th step: unwrapping wire, in strict accordance with the requirement of design working drawing, by design laying depth, region, carry out unwrapping wire, require unwrapping wire accurate;
The 9th step: bottom overcoat paves, according to design mixture proportion, carries out mix preparation to silt, basalt fibre composite soil at the construction field (site); Slope surface treatment, scratches processing to domatic, and sprays layer of polyethylene polyol curing agent liquid; Before basic unit's domatic injection polyvinyl alcohol liquid is not dry, according to design thickness, carry out paving of composite soil, in paving, carry out three times top-down beating compactings, guarantee composite soil degree of compaction and the density of design;
The tenth step: middle level overcoat sprays, and according to design mixture proportion, at the construction field (site) silt, basalt fibre, polyvinyl alcohol mixing soil is carried out to mix preparation; Slope surface treatment, scratches processing to domatic, and sprays layer of polyethylene polyol curing agent liquid; Before basic unit's domatic injection polyvinyl alcohol liquid is not dry, according to design thickness, carry out the injection of composite soil, in injection, control pressure and the speed of spraying, guarantee density of mixed soil and the slope leveling degree of design;
The 11 step: common the sowing grass seeds by duster determining according to design scheme carried out grass planting construction with alien earth sparging method, the common constructure scheme of sowing grass seeds by duster is as follows: 1. slope surface treatment: roadbed slope is scratched to processing, be convenient to fertilising, make seed be combined with roadbed slope tightr simultaneously; 2. fertilising: according to the fertility of soil, apply in 48h prior to seeding; 3. domatic watering: before sowing grass seeds by duster, tackle domatic watering, keep domatic dampness, be beneficial to seed germination; 4. the preparation of sowing grass seeds by duster: stocked the materials such as seed, adhesive, seed should be through purity check and germination percentage test, and carries out vernalization and prepare before gushing; 5. hydraulic pressure is sowed grass seeds by duster: will after seed, adhesive and the blending of modified polyvinylalcohol liquid, sow grass seeds by duster uniformly rapidly on domatic; 6. cover nonwoven: tighten limit mouth, with bamboo nail, bury with soil at two, overlapping 10cm between nonwoven; 7. maintenance: do not rain and water to keep ground moistening every day after sowing grass seeds by duster as; while growing to setting height to seedling; take nonwoven off; before taking off, should suitably temper dew seedling; forbid that fine day takes off cloth suddenly; after Cheng Ping, can reduce gradually the number of times watering, alien earth sparging constructure scheme is according to highway environment protection design specifications JT2006-98, alien earth sparging green material application standard JT2002-45, alien earth sparging greening Foundation Design material standard JT2002-41, spraying and seeding afforesting construction technology rules JT2002-127.
Claims (2)
1. the basalt fibre of powdery soil slope is combined an antiscour protection construction method with polyvinyl alcohol, it is characterized in that the method comprises design and construction two parts, and concrete steps are as follows:
The first step: collect the 10 years above rainfall observational datas in weather station in engineering area, calculate the average rainfall intensity in design recurrence interval and rainfall duration according to 9.1.6 bar in < < highway drainage design specifications JTG/T D33-2012 > >; If lack rainfall observational data, can, according to 9.1.7 bar in < < highway drainage design specifications JTG/T D33-2012 > >, calculate rainfall intensity;
Second step: prevent and treat 2.0.3 in standard GB/T50434-2007 > > clause according to the water and soil conservation of < < development & construction project, in conjunction with the gradient of intending carrying out safeguard procedures side slope, according to < < classification of soil erosion grade scale SL190-96 > > 4.1.2, determine corresponding intend carrying out the engineering slope Grading index of soilerosion intensity of safeguard procedures and corresponding allowing average soil erosion modulus and allow average Soil loss thickness, These parameters is the controlling indicator of antiscour guard technology requirement,
The 3rd step: the basalt fibre of powdery soil slope combines antiscour guard technology with polyvinyl alcohol and construction method adopts three layers of stratification and injection or the domatic antiscour overcoat of the construction that paves, and comprises top layer overcoat: common sowing grass seeds by duster or alien earth sparging grass planting layer, middle level overcoat: silt, short basalt fiber, containing the mixed layer of the modified polyvinylalcohol of plant nutrition liquid, bottom overcoat: the mixed layer of silt, basalt long fiber, according to the plan of second step, carry out the controlling indicator of allowing soil erosion intensity of safeguard procedures side slope, tentatively draft 5 groups of protection effect degree different by fiber, mix ratio, modified polyvinylalcohol mixes ratio, and the protection Design scheme of each overcoat thickness composition, according to the requirement of < < development & construction project conservation technology standard GB50433-2008 > > 5.7.6, in conjunction with rainfall intensity that the first step obtains, according to < < development & construction project conservation technology standard GB50433-2008 > > 5.9.10, 5.9.11, 5.9.12, 5.9.13 in, rainfall or artificial rainfall runoff plot test are carried out in listed requirement, test obtains soil erosion modulus and the Soil loss thickness under above-mentioned each scheme, and compare with allowing controlling value, acquisition meets the protection Design scheme of antiscour condition, if cannot meet antiscour condition, according to result of the test, reformulating scheme tests,
The 4th step: the slope stability of carrying out whole protective facing for the protection Design scheme that meets antiscour condition is checked, each scheme satisfying condition is carried out to corresponding silt and mix ratio with fiber, modified polyvinylalcohol mix than shear strength test, to obtain respective intensities index, in conjunction with each overcoat thickness, according to highway subgrade design specifications JTG D30-2004, carrying out the slope stability of whole protective facing checks, check by rear and finally select final design scheme according to economy, if check, do not pass through, according to stability result of calculation, suitably increase mix than and overcoat thickness, re-start check, until meet stability requirement,
The 5th step: the soil fertility index based on Project Areas silt, selected according to highway environment protection design specifications JT2006-98 is common sowing grass seeds by duster or alien earth sparging grass planting scheme, the common layer 0.5cm left and right of sowing grass seeds by duster, alien earth sparging layer 2cm left and right; Construction part:
The 6th step: guarantee that powdery soil slope is stability, should carry out again the construction of antiscour overcoat by after date when side slope early stage stagnating one section after treatment measures during construction, guarantee that the sedimentation and deformation of side slope completes before construction;
The 7th step: clear up domaticly, clear up the side slope surface of works area, clear up and domaticly should guarantee domatic camber average out to ± 10cm, forbid occurring counter-slope;
The 8th step: unwrapping wire, in strict accordance with the requirement of design working drawing, by design laying depth, region, carry out unwrapping wire, require unwrapping wire accurate;
The 9th step: bottom overcoat paves, according to design mixture proportion, carries out mix preparation to silt, basalt fibre composite soil at the construction field (site); Slope surface treatment, scratches processing to domatic, and sprays layer of polyethylene polyol curing agent liquid; Before basic unit's domatic injection polyvinyl alcohol liquid is not dry, according to design thickness, carry out paving of composite soil, in paving, carry out three times top-down beating compactings, guarantee composite soil degree of compaction and the density of design;
The tenth step: middle level overcoat sprays, and according to design mixture proportion, at the construction field (site) silt, basalt fibre, polyvinyl alcohol mixing soil is carried out to mix preparation; Slope surface treatment, scratches processing to domatic, and sprays layer of polyethylene polyol curing agent liquid; Before basic unit's domatic injection polyvinyl alcohol liquid is not dry, according to design thickness, carry out the injection of composite soil, in injection, control pressure and the speed of spraying, guarantee density of mixed soil and the slope leveling degree of design;
The 11 step: common the sowing grass seeds by duster determining according to design scheme carried out grass planting construction with alien earth sparging method, the common constructure scheme of sowing grass seeds by duster is as follows: 1. slope surface treatment: roadbed slope is scratched to processing, be convenient to fertilising, make seed be combined with roadbed slope tightr simultaneously; 2. fertilising: according to the fertility of soil, apply in 48h prior to seeding; 3. domatic watering: before sowing grass seeds by duster, tackle domatic watering, keep domatic dampness, be beneficial to seed germination; 4. the preparation of sowing grass seeds by duster: stocked the materials such as seed, adhesive, seed should be through purity check and germination percentage test, and carries out vernalization and prepare before gushing; 5. hydraulic pressure is sowed grass seeds by duster: will after seed, adhesive and the blending of modified polyvinylalcohol liquid, sow grass seeds by duster uniformly rapidly on domatic; 6. cover nonwoven: tighten limit mouth, with bamboo nail, bury with soil at two, overlapping 10cm between nonwoven; 7. maintenance: do not rain and water to keep ground moistening every day after sowing grass seeds by duster as; while growing to setting height to seedling; take nonwoven off; before taking off, should suitably temper dew seedling; forbid that fine day takes off cloth suddenly; after Cheng Ping, can reduce gradually the number of times watering, alien earth sparging constructure scheme is according to highway environment protection design specifications JT2006-98, alien earth sparging green material application standard JT2002-45, alien earth sparging greening Foundation Design material standard JT2002-41, spraying and seeding afforesting construction technology rules JT2002-127.
2. the basalt fibre of powdery soil slope according to claim 1 is combined antiscour protection construction method with polyvinyl alcohol, it is characterized in that in the 3rd step: common sowing grass seeds by duster or alien earth sparging grass planting bed thickness 0.5～2cm; Middle level overcoat: silt, the thick 6mm～20mm of short basalt fiber; The mixing bed thickness 2～5cm that contains the modified polyvinylalcohol of plant nutrition liquid; Bottom overcoat: mixing bed thickness 5～15cm of silt, the thick 20mm～30mm of basalt long fiber.
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| CN107371770A (en) * | 2017-09-12 | 2017-11-24 | 北京林业大学 | One kind flowing sand grassland fast reconstructing method |
| CN109024626A (en) * | 2018-08-15 | 2018-12-18 | 深圳市粤通建设工程有限公司 | Tearing away of bank Treatment Methods |
| CN111213553A (en) * | 2020-02-18 | 2020-06-02 | 中煤地华盛水文地质勘察有限公司 | Extrusion type spray seeding process for organic soil aggregate |
| CN111233380A (en) * | 2020-02-24 | 2020-06-05 | 长安大学 | Loess slope surface protection material and preparation and use method thereof |
| CN112921730A (en) * | 2021-01-20 | 2021-06-08 | 南京工业大学 | Discrete reinforced modified silt and modification method based on lignin and fibers |
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| CN111213553A (en) * | 2020-02-18 | 2020-06-02 | 中煤地华盛水文地质勘察有限公司 | Extrusion type spray seeding process for organic soil aggregate |
| CN111233380A (en) * | 2020-02-24 | 2020-06-05 | 长安大学 | Loess slope surface protection material and preparation and use method thereof |
| CN112921730A (en) * | 2021-01-20 | 2021-06-08 | 南京工业大学 | Discrete reinforced modified silt and modification method based on lignin and fibers |
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