CN116837875A - Ecological slope protection structure of fissured soil side slope and construction method - Google Patents
Ecological slope protection structure of fissured soil side slope and construction method Download PDFInfo
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- CN116837875A CN116837875A CN202310856300.9A CN202310856300A CN116837875A CN 116837875 A CN116837875 A CN 116837875A CN 202310856300 A CN202310856300 A CN 202310856300A CN 116837875 A CN116837875 A CN 116837875A
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- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 31
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Classifications
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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
-
- 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
- A01G13/00—Protecting plants
- A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
- A01G13/0256—Ground coverings
- A01G13/0268—Mats or sheets, e.g. nets or fabrics
- A01G13/0275—Films
-
- 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
- A01G20/00—Cultivation of turf, lawn or the like; Apparatus or methods therefor
-
- 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
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/10—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material
-
- 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
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/20—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material
-
- 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
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/30—Growth substrates; Culture media; Apparatus or methods therefor based on or containing synthetic organic compounds
-
- 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
- E02D3/005—Soil-conditioning by mixing with fibrous materials, filaments, open mesh or the like
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0051—Including fibers
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention relates to an ecological slope protection structure of a fissured soil side slope and a construction method, wherein the structure comprises an iron wire net, a solidified soil layer, a sisal fiber and biochar modified soil layer, and PAM and Na 2 SO 4 Improving soil layers and vegetation layers; the height of the top of the wire netting is 60 mm-70 mm away from the untreated slit soil slope; the solidified soil layer is fractured soil, water and a curing agentThe thickness of the formed solidified soil is 80 mm-120 mm; the sisal fiber and biochar modified soil layer is formed by slit soil, sisal fiber, biochar and water, and is covered on the solidified soil layer, and the thickness is 40-60mm; the PAM+Na 2 SO 4 The improved soil layer is PAM+Na formed by fissured soil, polyacrylamide, sodium sulfate and water 2 SO 4 The thickness of the improved soil is 90 mm-110 mm; the vegetation layer is planted in PAM+Na 2 SO 4 And (5) improving the soil layer. Not only can remarkably improve the strength and the slope stability of the slit soil, but also can realize local material taking and waste utilization by improving the slit soil of the slope, thereby being beneficial to the local ecological environment protection.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering, and particularly relates to an ecological slope protection structure of a fissured soil side slope and a construction method.
Background
The crack soil is high-plasticity cohesive soil with water absorption expansion, water loss shrinkage and larger expansion and shrinkage deformation capacity, and has the characteristics of poor water permeability, large strength change, water loss shrinkage consolidation, sharp reduction in strength when meeting water and the like. Typical fracture clays include red clay, expansive clay, loess, and other swelling clays. The crack soil is dehydrated and contracted, so that cracks are easy to generate, the strength of the soil slope is reduced due to the cracks, the stability of the slope is reduced, engineering diseases such as slope collapse and the like are easy to be caused, and the crack soil slope must be protected and treated. Common engineering measures for slope protection and management include engineering slope protection, grid grass planting slope protection, turf slope protection and the like. The simple engineering slope protection belongs to a rigid structure, cannot adapt to the deformation of the slope, has high manufacturing cost and is not beneficial to ecological protection; although the grid grass planting slope protection and turf are favorable for environmental protection, the generation and development of slope cracks cannot be effectively prevented due to the fact that the slope soil is not improved, and therefore slope engineering diseases are easy to generate. Therefore, according to the soil conditions of the fractured soil, a slope protection structure suitable for the fractured soil is provided, and the aim of ecologically treating the fractured soil slope is fulfilled.
Disclosure of Invention
The invention aims to provide an ecological slope protection structure of a fissured soil side slope and a construction method thereof, which are used for solving the defects of the technology. The invention not only can obviously improve the strength and the slope stability of the slit soil, but also can realize local material taking and waste utilization by improving the slit soil of the slope, is beneficial to the local ecological environment protection, and accords with the concepts of resource recycling, ecological China, green construction and the like advocated by China.
In order to achieve the above purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides an ecological slope protection structure of a fissured soil slope, which comprises an iron wire net, a solidified soil layer, a sisal fiber and biochar modified soil layer, and PAM and Na 2 SO 4 Soil and vegetation layers are improved.
The height of the top of the wire netting is 60-70mm away from the slope surface of untreated slit soil, the wire netting covers the slope top, the slope surface and the slope foot and is used for anchoring filled solidified soil, and an anchoring steel bar is arranged at every other connecting point of the wire netting and is used for fixing the wire netting.
The solidified soil layer is solidified soil formed by slit soil, water and a curing agent, the 28-day unconfined compressive strength of the solidified soil is between 0.4MPa and 1MPa, the 28-day unconfined compressive strength is preferably between 0.5 and 0.9MPa, the fluidity is between 150mm and 200mm, the solidified soil layer is covered on an iron wire net, the stability of a slit soil slope is further improved, and the thickness of the solidified soil layer is between 80mm and 120mm.
The sisal fiber and biochar modified soil layer is formed by fissured soil, sisal fiber, biochar and water, the sisal fiber and biochar modified soil layer is covered on the solidified soil layer, the fissured rate of the sisal fiber and biochar modified soil is not more than 5%, the average width of the fissures is not more than 2mm, the thickness is 40-60mm, and the sisal fiber and biochar modified soil formed by the sisal fiber and biochar modified fissured soil can inhibit the generation and development of the fissures so as to reduce the infiltration of rainwater and improve the stability of a slope.
The PAM+Na 2 SO 4 The improved soil layer is fissured soil, polypropylene Amide (PAM), sodium sulfate (Na) 2 SO 4 ) Pam+na formed with water 2 SO 4 Modified soil covered on sisal fiber and biochar modified soil layer, PAM+Na 2 SO 4 The 28-day unconfined compressive strength of the improved soil is between 0.5MPa and 1MPa, the disintegration time is not less than 300min, and the thickness is 90mm to 110mm. PAM+Na 2 SO 4 The improved soil can reduce rainwater infiltration, reduce water evaporation in the soil, improve the fertility of the fractured soil, resist the flushing of the side slope by the rainwater and facilitate vegetation growth.
The vegetation layer is planted in PAM+Na 2 SO 4 On the improved soil layer, the selected plants adapt to the local climate environment and the soil layer, the vegetation layer is favorable for ecological environment protection, water and soil loss is prevented, and the stability of the fissured soil slope is further enhanced.
The range of the mass ratio of each substance in the solidified soil is as follows:
fracture soil: and (3) cement: slag: steel slag: gypsum: sodium sulfate: water=1200 (30-110): (110-30): (7-100): (4-15): (2-15): (700-900);
the length range of the sisal fibers in the sisal fibers and biochar modified soil is 10-30mm, the doping amount of the sisal fibers is 0.1% -0.5%, and the doping amount of the biochar is 4% -10%.
The PAM+Na 2 SO 4 The PAM doping amount in the improved soil ranges from 0.01% to 0.15%, and the sodium sulfate doping amount ranges from 0.5% to 3%.
The solidified soil layer, sisal fiber, biochar modified soil layer, PAM and Na 2 SO 4 The concrete proportion of the improved soil layer can select the optimal and most economical formula in the range according to different properties of the fractured soil, so that each layer can meet the performance requirements of each layer, and the function of fracture control and protection of the fractured soil can be achieved.
In a second aspect, the invention also provides a construction method of the ecological slope protection structure of the fissured soil slope, which comprises the following steps:
(1) Digging according to the designed slope rate, drilling holes at the appointed position of the slope, implanting reinforcing steel bars, and binding wire netting on the reinforcing steel bars to enable the wire netting to be parallel to the slope;
(2) Mixing solidified soil according to a mixing ratio, spreading the solidified soil on a slope of the fractured soil, manually rolling and compacting, covering a plastic film, and curing for 7-14 days;
(3) Mixing sisal fiber and biochar modified soil according to a mixing ratio, paving the sisal fiber and biochar modified soil on a solidified soil layer, and manually rolling and compacting;
(4) Mixing PAM+Na according to the mixing proportion 2 SO 4 The improved soil is paved on a sisal fiber and biochar improved soil layer and is manually leveled;
(5) At PAM+Na 2 SO 4 Grass seeds are sowed on the improved soil layer, and the improved soil layer is covered with a plastic film for maintenance for 7-14 days after being watered.
In a third aspect, the invention provides an ecological slope protection construction method for a fissured soil side slope, which comprises the following steps:
step 1, recognizing a fracture soil slope at a slope site of suspected fracture soil, collecting a soil sample, air-drying, carrying out a particle analysis experiment, a liquid-plastic limit experiment and a shrinkage experiment, determining whether the slope soil belongs to cohesive soil or not and whether the linear shrinkage rate is greater than 2.5% according to experimental indexes, and if the slope soil is cohesive soil and the linear shrinkage rate is greater than 2.5%, determining that the slope soil is fracture soil;
step 2, laboratory improved soil manufacturing and detection
Step 2.1, solidifying the soil
Collecting a slope fissured soil sample, taking slag, cement, gypsum, steel slag, sodium sulfate and the like as curing agent materials, adding a proper amount of water, fully mixing, compacting and forming, curing for 28 days, performing an unconfined compression test and a fluidity test, testing the compression strength and fluidity of the solidified soil, and determining the optimal solidified soil mixing ratio according to the comprehensive performance of the solidified soil;
step 2.2, sisal fiber and biochar modified soil
Sisal fibers with different lengths and different doping amounts and biochar with different doping amounts are selected to be uniformly doped into the fractured soil, the samples are compacted and prepared after stewing for 48 hours, an indoor cracking test is carried out, indexes such as the fracture rate, the average fracture width and the like of the samples are measured, and the optimal doping amount and the optimal mixing ratio are determined according to the experimental indexes;
step 2.3, PAM+Na2SO4 soil improvement
Selecting different doping amounts of PAM and Na 2 SO 4 Dry blending and liquid blending are respectively carried out (PAM and Na are firstly mixed 2 SO 4 Dissolving in water) into the fractured soil, stewing for 48 hours, compacting and preparing samples, curing for 28 days, carrying out unconfined compression resistance and disintegration test, measuring indexes such as compression strength, disintegration time and the like, and determining the optimal doping mode and the optimal doping amount of the additive according to the experimental indexes;
step 3, site construction
Step 3.1, preparation for construction
Excavating a side slope on site according to the designed side slope rate, finishing and forming, and drawing a crack soil side slope area needing to be reinforced by lime powder; manufacturing an iron wire net sheet; taking a field fractured soil sample, measuring the water content, and doping different modifying agents into the fractured soil according to the optimal doping amount and the optimal doping ratio determined in the step 2 to obtain different modified soil for later use; the modifier in the solidified soil is a curing agent, the modifier in the sisal fiber and biochar modified soil is sisal fiber and biochar, and the modifier in the PAM+Na2SO4 modified soil is PAM and Na 2 SO 4 ；
Step 3.2, wire netting construction
Firstly, measuring and paying off a fracture soil slope, determining the position of a steel bar to be anchored, then inserting the steel bar at a designated position, requiring stability without loosening, and finally binding an iron wire net on the anchored steel bar, wherein the distance between the iron wire net and a slope surface is required to be 60-70mm;
step 3.3, construction of the solidified soil layer
Pouring the prepared solidified soil mixture into the slope surface from top to bottom along the wire netting layer by layer, manually compacting and approximately trowelling, ensuring that the surface height difference is not more than 20mm, ensuring that the solidified soil thickness is 80-120mm, and covering the surface with a film for curing;
step 3.4, sisal fiber and biochar improved soil layer construction
After curing the solidified soil layer for one week to form primary strength, performing construction on the sisal fiber and biochar modified soil layer, layering and paving the sisal fiber and biochar modified soil prepared on site from the slope bottom to the slope top along the slope surface, and adopting manual compaction molding to ensure that the surface is primarily smooth, the surface height is not more than 20mm, and the soil layer thickness is 40-60mm;
step 3.5, PAM+Na 2 SO 4 Improved soil layer construction
PAM+Na prepared on site 2 SO 4 The improved soil is paved on a sisal fiber and biochar improved soil layer in two layers from the slope bottom to the slope top along the slope surface, wherein the lower layer is compacted manually and has the thickness of 70-90mm, and the upper layer is not compacted and has the thickness of 20mm;
step 3.6, construction of vegetation layer
At PAM+Na 2 SO 4 The surface of the improved soil layer is spread with grass seeds suitable for local growth, then water is sprayed on the soil layer, so that the grass seeds are tightly bonded with the soil layer, and finally, a plastic film is covered for curing for 7-14 days;
step 4, ecological slope protection completion acceptance
And 3, after finishing 3-6 months, forming a vegetation layer after the grass seeds grow, and carrying out completion acceptance of ecological slope protection, wherein the completion acceptance comprises detection of related indexes such as slope flatness, integrity, vegetation growth rate and height.
Compared with the prior art, the invention has the beneficial effects that:
1. the ecological slope protection structure is formed by combining a plurality of improved soil layers, the solidified soil layers can seal and excavate crack soil slopes and greatly improve the strength of the slope soil, the sisal fiber and biochar improved soil layers can inhibit the generation and the expansion of cracks, and PAM+Na 2 SO 4 The improved soil layer can improve the strength of the fractured soil and reduce the entry of external moisture and the evaporation of internal moisture, and the sisal fiber, biochar improved soil and PAM+Na 2 SO 4 The solidified soil of the improved soil is beneficial to the growth of vegetation, and the vegetation layer can slow down water and soil loss and protect ecological environment. The ecological slope protection structure can control the generation and development of cracks through the synergistic effect of the three improved soil layers, so as to control the crack generation, improve the slope stability, reduce the water and soil loss and promote the growth of cracksThe purpose of vegetation growth on the side slope is achieved.
2. According to the construction method, each improved soil layer has different mix proportion, characteristics and functions, and the ecological protection structure with the best crack control effect and optimal economical efficiency is achieved by scientifically improving and reasonably layering the cracked soil.
3. The solidified soil, sisal fiber and biochar adopted in the invention improve soil, PAM and Na 2 SO 4 The improved soil can be prepared into different mixing ratios according to different fracture soil types and construction requirements, and the requirements of various fracture soil side slopes are met.
4. The sisal fibers, the biochar and the PAM adopted by the invention belong to ecological environment-friendly materials, and are beneficial to ecological environment protection; the raw materials of the biochar used in the invention are straw, wheat straw, seed husks, animal manure and other crops, and garbage manufactured by human beings, such as sewage sludge or other household garbage, and the biochar produced by using garbage waste materials has double carbon reduction effects.
5. The invention adopts the slit soil as the side slope material, and can fully utilize the bad soil, thereby reducing the construction cost and reducing the problem that the waste soil occupies land resources.
6. The ecological slope protection structure is simple, the construction difficulty is low, the construction time and cost can be saved, and the application range is wide.
Drawings
FIG. 1 is a schematic cross section of an ecological slope protection structure of a slit soil slope of the invention;
FIG. 2 is a schematic diagram of the layout of an ecological slope protection wire netting of the slit soil side slope of the invention;
FIG. 3 is a three-dimensional structure diagram of an ecological slope protection treatment layer of the fractured-soil slope;
FIG. 4 is a graph showing the analysis results of the fissured soil particles in example 1;
FIG. 5 is a graph showing the results of analysis of the fractured soil particles in example 2.
Wherein, 1 side slope crack soil layer, 2 wire netting layer, 3 solidified soil layer, 4 sisal hemp fiber and biological carbon improved soil layer, 5PAM+Na 2 SO 4 Improving soil layer and 6 vegetation layer.
Detailed Description
The present invention will be further described with reference to the following specific examples and drawings, which illustrate specific construction methods, and are not to be construed as limiting the invention.
The ecological slope protection structure of the slit soil slope (see figures 1-3) comprises an iron wire net layer 2, a solidified soil layer 3, a sisal fiber and biochar modified soil layer 4 and PAM and Na 2 SO 4 A modified soil layer 5 and a vegetation layer 6; the solidified soil layer is modified by slag, cement, gypsum, steel slag, sodium sulfate and the like on the basis of the fractured soil and is covered on the wire netting layer; the sisal fiber and biochar modified soil layer 4 is used for inhibiting cracks by using biochar and sisal fiber modified soil; PAM+Na 2 SO 4 The soil layer is improved by using the polypropylene amide and sodium sulfate to improve the soil and improve the fertility and the rainwater permeability.
The height of the top of the wire netting is 60-70mm away from the slope surface of untreated slit soil, the wire netting covers the slope top, slope surface and slope foot of the slope slit soil layer 1 and is used for anchoring filled solidified soil, and an anchoring steel bar (see figure 2) is arranged at every other connecting point of the wire netting and is used for fixing the wire netting.
The invention aims at improving the fissured soil in three ways to form three improved layers, namely a solidified soil layer 3, a sisal fiber and biochar improved soil layer 4 and PAM+Na 2 SO 4 The improved soil layer 5 and the soil layer cooperate to control the generation and development of cracks, effectively prevent the entry and evaporation of water and realize the effective protection of the crack soil slope.
Embodiment 1, an ecological slope protection structure of a fissured soil side slope and a construction method thereof, comprising the following steps:
step 1, collecting soil samples on a slope site of suspected fracture soil, air-drying, and carrying out a particle analysis experiment, a liquid plastic limit experiment and a shrinkage experiment, wherein the basic property indexes of the soil are shown in table 1, the particle analysis result is shown in figure 4, the proportion of sand grains (0.075 mm-2 mm) in the soil is 2.5%, the proportion of powder grains (0.005 mm-0.075 mm) is 19.7%, the proportion of sticky grains (less than 0.005 mm) is 77.8%, and the measured values of other property indexes of the soil are shown in table 1
Table 1: basic physical Properties of fractured soil
| Specific gravity of soil particles | Shrinkage/% | Body shrinkage/% | Linear shrinkage/% | Liquid limit/% | Plastic limit/% | Plasticity index |
| 2.72 | 16.3 | 14.05 | 4.87 | 67.7％ | 28.3％ | 39.4 |
As can be seen from the above table, the linear shrinkage of the slope soil selected in this example was 4.87% > 2.5%, and the slope soil was judged to be a slit soil, and further judged to be a high liquid limit clay based on particle analysis.
Step 2, laboratory improved soil manufacturing and detection
Step 2.1 preparation of solidified soil
Collecting a slope crack soil sample, taking slag, cement, gypsum, steel slag, sodium sulfate and the like as curing materials, adding a proper amount of water, fully mixing, compacting and forming. Wherein, in the present example, the blending amount of slag, cement, gypsum, steel slag and sodium sulfate, and water is as follows;
scheme one:
fracture soil: and (3) cement: slag: steel slag: gypsum: sodium sulfate: water=1200:32.4:72.0:7.2:4.8:3.6:800
Scheme II, cracking soil: and (3) cement: slag: steel slag: gypsum: sodium sulfate: water=1200:57.6:57.6:8.4:10.8:7.2:850
Scheme III:
fracture soil: and (3) cement: slag: steel slag: gypsum: sodium sulfate: water=1200:72.0:32.4:9.6:14.4:14.4:900
The solidified soil prepared according to the first, second and third schemes has the following 28-day unconfined compressive strength and fluidity:
table 2: compression strength value of solidified soil (peak strength)
| Group number | Scheme one | Scheme II | Scheme III |
| 28d compressive Strength | 0.497MPa | 0.896MPa | 0.917MPa |
Table 3: fluidity value of solidified soil
| Group number | Scheme one | Scheme II | Scheme III |
| Fluidity of flow | 182mm | 196mm | 209mm |
And finally, the compression strength value and the fluidity value of the second detection scheme meet the requirement that the unconfined compression strength is between 0.5 and 1MPa in 28 days, the fluidity is between 150 and 200mm, the economy is integrated, and the optimal blending amount is determined as the second scheme.
Step 2.2, manufacturing sisal fiber and biochar modified soil
Sisal fibers with different lengths and different doping amounts and biochar with different doping amounts are selected to be uniformly doped into the fractured soil, after the mixture is stewed for 48 hours, the mixture is compacted and sampled, then an indoor cracking test is carried out, indexes such as fracture rate, average fracture width and the like are measured, wherein in the embodiment, the lengths of the Sisal Fibers (SF) are 10mm, 20mm and 30mm, the doping amounts are selected to be 0.15%, 0.3% and 0.45%, and the doping amounts of the biochar (B) are set to be 4%, 6% and 8%. The specific test results are shown in Table 4 and Table 5:
table 4: sisal fiber and biochar improved soil fracture rate
| Blending amount | 4％B | 6％B | 8％B |
| 10mm/0.15％SF | 7.12％ | 7.09％ | 7.02％ |
| 10mm/0.30％SF | 7.08％ | 7.01％ | 6.94％ |
| 10mm/0.45％SF | 7.02％ | 6.98％ | 6.89％ |
| 20mm/0.15％SF | 6.84％ | 6.77％ | 6.69％ |
| 20mm/0.30％SF | 5.99％ | 5.89％ | 5.76％ |
| 20mm/0.45％SF | 5.26％ | 5.17％ | 5.09％ |
| 30mm/0.15％SF | 5.11％ | 5.04％ | 5.01％ |
| 30mm/0.30％SF | 5.07％ | 4.91％ | 4.61％ |
| 30mm/0.45％SF | 4.72％ | 4.68％ | 4.12％ |
Table 5: average crack width of sisal hemp fiber and biochar modified soil
| Blending amount | 4％B | 6％B | 8％B |
| 10mm/0.15％SF | 3.23mm | 3.91mm | 2.74mm |
| 10mm/0.30％SF | 2.83mm | 3.51mm | 2.52mm |
| 10mm/0.45％SF | 2.91mm | 3.66mm | 2.68mm |
| 20mm/0.15％SF | 2.45mm | 2.92mm | 2.13mm |
| 20mm/0.30％SF | 2.21mm | 2.36mm | 1.72mm |
| 20mm/0.45％SF | 1.92mm | 2.14mm | 1.64mm |
| 30mm/0.15％SF | 2.35mm | 2.63mm | 2.11mm |
| 30mm/0.30％SF | 1.94mm | 2.02mm | 1.89mm |
| 30mm/0.45％SF | 2.04mm | 2.6mm | 1.99mm |
Finally, as can be seen from tables 4 and 5, the ratio of the amount of the mixture to the average width of the cracks of less than 2mm, which satisfies the crack ratio of less than 5%, is as follows: in combination with the economical principle, the optimal blending scheme is 30mm/0.30% SF+8% B and 30mm/0.45% SF+8% B.
Step 2.3, PAM+Na 2 SO 4 Improved soil preparation
Selecting different doping amounts of PAM and Na 2 SO 4 Dry blending and liquid blending are respectively carried out (PAM and Na are firstly mixed 2 SO 4 Dissolved in water) into the fractured soil, stewing the materials for 48 hours, compacting and preparing samples, curing for 28 days, carrying out unconfined compression resistance and disintegration tests, and determining indexes such as compression strength, disintegration time and the like, wherein in the embodiment, the doping amount of PAM is set to 0.03%,0.06%,0.09%, and the doping amount of sodium sulfate is set to 1%,2%, and the specific test results are shown in tables 6 and 7:
table 6: PAM+Na2SO4 improved soil compressive strength value (peak strength)
Table 7: PAM+Na2SO4 improved soil disintegration time
| Blending amount | 1％Na 2 SO 4 | 2％Na 2 SO 4 |
| 0.03% PAM (Dry) | 261min | 249min |
| 0.06% PAM (Dry) | 297min | 284min |
| 0.09% PAM (Dry) | 281min | 267min |
| 0.03% PAM (liquid) | 294min | 286min |
| 0.06% PAM (liquid) | 329min | 307min |
| 0.09% PAM (liquid) | 305min | 299min |
With reference to tables 6 and 7, the compressive strength and disintegration time were each set to be between 0.5MPa and 1MPa, and the disintegration time was greater than 300min for three groups, each of 0.06% PAM (liquid) +1% Na 2 SO 4 0.06% PAM (liquid) +2% Na 2 SO 4 And 0.09% pam (liquid) +1% na 2 SO 4 But is compared withCompared with the compressive strength and the disintegration time, the optimal blending ratio is obviously shown as follows: 0.06% PAM (liquid) +1% Na 2 SO 4 。
Step 3, site construction
Step 3.1, preparation for construction
The field is according to 1:1.75, excavating a side slope, finishing and forming, and drawing a crack soil side slope area needing to be reinforced by lime powder; manufacturing an iron wire net sheet; taking a field fractured soil sample, measuring the water content to be 17.9%, and doping different modifying agents into the fractured soil according to the optimal doping amount and the optimal doping ratio determined in the step 2 to obtain different modified soil for later use;
step 3.2, wire netting construction
Firstly, measuring and paying off a fracture soil slope, determining the position of a steel bar to be anchored, then inserting the steel bar at a designated position, requiring stability without loosening, and finally binding an iron wire net on the anchored steel bar, wherein the distance between the iron wire net and the slope surface is 70mm;
step 3.3, construction of the solidified soil layer
Pouring prepared solidified soil on the slope surface from top to bottom along the wire netting layer by layer, manually compacting and approximately trowelling, ensuring that the surface height difference is not more than 20mm, ensuring that the solidified soil thickness is 100mm, and covering the surface with a film for curing;
step 3.4, sisal fiber and biochar improved soil layer construction
After curing the solidified soil layer for one week to form primary strength, performing construction on the sisal fiber and biochar modified soil layer, layering and paving the sisal fiber and biochar modified soil prepared on site from the slope bottom to the slope top along the slope surface, and adopting manual compaction molding to ensure that the surface is primarily smooth, the surface height difference is not more than 20mm, and the soil layer thickness is 50mm;
step 3.5, PAM+Na 2 SO 4 Improved soil layer construction
Pam+na prepared in step 3.1 2 SO 4 The improved soil is paved on a sisal fiber and biochar improved soil layer in two layers from the slope bottom to the slope top along the slope surface, wherein the lower layer is compacted manually and has the thickness of 80mm, and the upper layer is not compacted and has the thickness of 20mm;
step 3.6, construction of vegetation layer
At PAM+Na 2 SO 4 And (3) sowing the grass seeds of the kuh and the horsetail on the surface of the improved soil layer, spraying water on the soil layer to enable the grass seeds to be tightly bonded with the soil layer, and finally covering a plastic film for curing for 14 days.
Step 4, ecological slope protection completion acceptance
And 3, after finishing 6 months, the grass seeds grow to form a vegetation layer, and completion acceptance of ecological slope protection is carried out, wherein related indexes such as slope flatness, integrity, vegetation growth rate and height are detected, and finally, all the measured indexes are larger than standard standards, so that the improvement effect is good, and the crack control effect is good.
Embodiment 2, an ecological slope protection structure of an expansive soil side slope and a construction method thereof are known, comprising the following steps:
step 1, collecting an expansive soil sample on a slope site known as expansive soil, air-drying, and performing a particle analysis experiment, a liquid-plastic limit experiment and a shrinkage experiment, wherein the basic property indexes of the expansive soil are shown in table 8, and the particle analysis result is shown in fig. 5.
Table 8: basic physical Properties of expansive soil
| Free expansion rate/% | Total rate of expansion/contraction% | Linear shrinkage/% | Liquid limit/% | Plastic limit/% | Plasticity index |
| 45％ | 7.19％ | 2.89％ | 47％ | 20.3％ | 26.7 |
So according to the free expansion ratio of 45% and the linear shrinkage ratio of 2.89% > 2.5%, the selected expansive soil is weak expansive soil and is slit soil in this example.
Step 2, laboratory improved soil manufacturing and detection
Step 2.1 preparation of solidified soil
Collecting an expansive soil side slope crack soil sample, taking slag, cement, gypsum, steel slag, sodium sulfate and the like as curing materials, adding a proper amount of water, fully mixing, compacting and forming. Wherein, in the present example, the blending amount of slag, cement, gypsum, steel slag and sodium sulfate, and water is as follows;
scheme one:
expansive soil: and (3) cement: slag: steel slag: gypsum: sodium sulfate: water=1200:67.2:100.8:42:8.4:3.6:870
Scheme II:
expansive soil: and (3) cement: slag: steel slag: gypsum: sodium sulfate: water=1200:86.4:57.6:36:7.2:2.4:870
Scheme III:
expansive soil: and (3) cement: slag: steel slag: gypsum: sodium sulfate: water=1200:100.8:67.2:48:9.6:4.8:870
The 28-day unconfined compressive strength and fluidity of the solidified soil prepared according to the first, second and third schemes are as follows:
table 9: compression strength value of solidified soil (peak strength)
| Group number | Scheme one | Scheme II | Scheme III |
| 28d compressive Strength | 0.499MPa | 0.796MPa | 0.926MPa |
Table 10: fluidity value of solidified soil
| Group of | Scheme one | Scheme II | Scheme III |
| Fluidity of flow | 179mm | 183mm | 187mm |
As can be seen from the comprehensive tables 9 and 10, the scheme II and the scheme III both meet the requirement that 28 days of unconfined compressive strength is between 0.5MPa and 1MPa, the fluidity is between 150mm and 200mm, but the scheme III is much more than the scheme II in cement consumption due to the combination of economy, and the manufacturing cost is higher, so that the optimal blending amount is determined to be the scheme II.
Step 2.2, manufacturing sisal fiber and biochar modified soil
Sisal fibers with different lengths and different doping amounts and biochar with different doping amounts are selected to be uniformly doped into expansive soil, after stewing for 48 hours, compaction and sample preparation are carried out, indoor cracking tests are carried out, indexes such as crack rate and average crack width are measured, wherein in the embodiment, the lengths of the sisal fibers are 10mm, 20mm and 30mm, the doping amounts are selected to be 0.15%, 0.3%, 0.45%, and the biochar doping amounts are set to be 3%, 5% and 7%. The specific experimental results are shown in tables 11 and 12:
table 11: sisal fiber and biochar improved soil fracture rate
| Blending amount | 3％B | 5％B | 7％B |
| 10mm/0.15％SF | 7.32％ | 7.26％ | 7.12％ |
| 10mm/0.30％SF | 7.25％ | 7.09％ | 7.01％ |
| 10mm/0.45％SF | 7.18％ | 7.02％ | 6.86％ |
| 20mm/0.15％SF | 6.82％ | 6.79％ | 6.77％ |
| 20mm/0.30％SF | 6.12％ | 6.04％ | 5.92％ |
| 20mm/0.45％SF | 5.91％ | 5.64％ | 5.23％ |
| 30mm/0.15％SF | 5.15％ | 5.09％ | 5.01％ |
| 30mm/0.30％SF | 5.06％ | 4.92％ | 4.81％ |
| 30mm/0.45％SF | 5.02％ | 4.96％ | 4.26％ |
Table 12: average crack width of sisal hemp fiber and biochar modified soil
| Blending amount | 3％B | 5％B | 7％B |
| 10mm/0.15％SF | 3.54mm | 4.02mm | 3.29mm |
| 10mm/0.30％SF | 2.99mm | 3.42mm | 2.78mm |
| 10mm/0.45％SF | 3.21mm | 3.76mm | 2.76mm |
| 20mm/0.15％SF | 2.54mm | 3.02mm | 2.23mm |
| 20mm/0.30％SF | 2.30mm | 2.62mm | 1.83mm |
| 20mm/0.45％SF | 2.03mm | 2.26mm | 1.74mm |
| 30mm/0.15％SF | 2.46mm | 2.84mm | 2.23mm |
| 30mm/0.30％SF | 2.02mm | 2.17mm | 1.98mm |
| 30mm/0.45％SF | 2.23mm | 2.81mm | 2.09mm |
Finally, according to tables 11 and 12, the crack rate is required to be less than 5% and the average width of the crack is required to be less than 2mm, and the mixing ratio is only: 30mm/0.30% SF+7% B, so the optimal blending scheme is 30mm/0.30% SF+7% B.
Step 2.3, PAM+Na 2 SO 4 Improved soil preparation
Selecting different doping amounts of PAM and Na 2 SO 4 Dry blending and liquid blending are respectively carried out (PAM and Na are firstly mixed 2 SO 4 Dissolved in water) into expansive soil, stewing for 48 hours, compacting and preparing samples, curing for 28 days, carrying out unconfined compression resistance and disintegration test, and determining indexes such as compression strength, disintegration time and the like, wherein in the embodiment, the doping amount of PAM is set to 0.03%, 0.05%, 0.07%, the doping amount of sodium sulfate is set to 1%,2%, and specific test results are as follows:
table 13: PAM+Na2SO4 improved soil compressive strength value (peak strength)
| Curing age | 1％Na2SO4 | 2％Na 2 SO 4 |
| 0.03% PAM (Dry) | 0.409MPa | 0.387MPa |
| 0.05% PAM (Dry) | 0.484MPa | 0.472MPa |
| 0.07% PAM (Dry) | 0.579MPa | 0.561MPa |
| 0.03% PAM (liquid) | 0.427MPa | 0.411MPa |
| 0.05% PAM (liquid) | 0.501MPa | 0.493MPa |
| 0.07% PAM (liquid) | 0.619MPa | 0.596MPa |
Table 14: PAM+Na 2 SO 4 Improved soil disintegration time
| Curing age | 1％Na 2 SO 4 | 2％Na 2 SO 4 |
| 0.03% PAM (Dry) | 212min | 202min |
| 0.05% PAM (Dry) | 264min | 249min |
| 0.07% PAM (Dry) | 309min | 297min |
| 0.03% PAM (liquid) | 223min | 211min |
| 0.05% PAM (liquid) | 274min | 236min |
| 0.07% PAM (liquid) | 349min | 323min |
With reference to tables 13 and 14, the compression strength and disintegration time were all set to be between 0.5MPa and 1MPa, and the disintegration time was set to be greater than 300min for three groups, 0.07% PAM (dry) +1% Na 2 SO 4 0.07% PAM (liquid) +1% Na 2 SO 4 And 0.07% pam (liquid) +2% na 2 SO 4 However, comparing the compressive strength and the disintegration time, it is evident that the optimum blending ratio is: 0.07% PAM (liquid) +1% Na 2 SO 4 。
Step 3, site construction
Step 3.1, preparation for construction
The field is according to 1:1.75, excavating a side slope, finishing and forming, and drawing an expansive soil side slope area needing reinforcement by lime powder; manufacturing an iron wire net sheet; taking a site expansive soil sample, measuring the water content to be 16%, and doping different modifying agents into the expansive soil according to the optimal doping amount and the optimal mixing ratio determined in the step 2 to obtain different modified soil for later use;
step 3.2, wire netting construction
Firstly, measuring and paying off an expansive soil slope, determining the position of a steel bar to be anchored, then inserting the steel bar at a designated position, requiring stability without loosening, and finally binding an iron wire net on the anchored steel bar, wherein the distance between the iron wire net and the slope surface is 60mm;
step 3.3, construction of the solidified soil layer
Pouring prepared solidified soil on the slope surface from top to bottom along the wire netting layer by layer, manually compacting and approximately trowelling, ensuring that the surface height difference is not more than 20mm, ensuring that the solidified soil has the thickness of 80mm, and covering the surface with a film for curing;
step 3.4, sisal fiber and biochar improved soil layer construction
After curing the solidified soil layer for one week to form primary strength, performing construction on the sisal fiber and biochar modified soil layer, layering and paving the sisal fiber and biochar modified soil prepared on site from the slope bottom to the slope top along the slope surface, and adopting manual compaction molding to ensure that the surface is primarily smooth, the surface height difference is not more than 20mm, and the soil layer thickness is 40mm;
step 3.5, PAM+Na 2 SO 4 Improved soil layer construction
Pam+na prepared in step 3.1 2 SO 4 The improved soil is paved on a sisal fiber and biochar improved soil layer in two layers from the slope bottom to the slope top along the slope surface, wherein the lower layer is compacted manually and has the thickness of 60mm, and the upper layer is not compacted and has the thickness of 20mm;
step 3.6, construction of vegetation layer
At PAM+Na 2 SO 4 The surface of the improved soil layer is spread with the seeds of the horsetail grass and the miscanthus, then water is sprayed on the soil layer, so that the seeds are tightly adhered to the soil layer, and finally, the plastic film is covered for maintenance for 10 days.
Step 4, ecological slope protection completion acceptance
And 3, after finishing 5 months, the grass seeds grow to form a vegetation layer, and completion acceptance of ecological slope protection is carried out, wherein related indexes such as slope flatness, integrity, vegetation growth rate and height are detected, and all the detected indexes meet the standard, so that good improvement effect is indicated.
The invention is applicable to the prior art where it is not described.
Claims (6)
1. The ecological slope protection structure of the fissured soil side slope is characterized by comprising an iron wire net, a solidified soil layer, a sisal fiber and biochar modified soil layer, and PAM and Na 2 SO 4 Improving soil layers and vegetation layers;
the height of the top of the wire netting is 60-70mm away from the untreated slit soil slope, the wire netting covers the slope top, the slope surface and the slope foot, anchoring steel bars are arranged at the connection points of the wire netting, and the steel bars are used for fixing the wire netting;
the solidified soil layer is solidified soil formed by slit soil, water and a curing agent, the 28-day unconfined compressive strength of the solidified soil is between 0.4MPa and 1MPa, the fluidity is between 150mm and 200mm, and the solidified soil is covered on an iron wire net; the thickness of the solidified soil layer is 80-120 mm;
the sisal fiber and biochar modified soil layer is sisal fiber and biochar modified soil formed by fissured soil, sisal fiber, biochar and water, the sisal fiber and biochar modified soil layer is covered on the solidified soil layer, the fissure rate of the sisal fiber and biochar modified soil is not more than 5%, the average width of the fissure is not more than 2mm, and the thickness is 40-60mm;
the PAM+Na 2 SO 4 The improved soil layer is fissured soil, polypropylene Amide (PAM), sodium sulfate (Na) 2 SO 4 ) Pam+na formed with water 2 SO 4 Modified soil covered on sisal fiber and biochar modified soil layer, PAM+Na 2 SO 4 The 28-day unconfined compressive strength of the improved soil is between 0.5MPa and 1MPa, the disintegration time is not less than 300min, and the PAM+Na 2 SO 4 The thickness of the improved soil layer is 90 mm-110 mm;
the vegetation layer is planted in PAM+Na 2 SO 4 And (5) improving the soil layer.
2. The ecological slope protection structure of a split soil slope according to claim 1, wherein the curing agent comprises slag, cement, gypsum, steel slag and sodium sulfate; the biochar comprises at least one of crops, animal manure, and human-made waste, wherein the crops comprise at least one of straw, wheat straw, and seed hulls, and the human-made waste comprises sewage sludge or household waste.
3. The ecological slope protection structure of a fractured soil slope according to claim 1, wherein the mass ratio of each substance in the solidified soil has a value ranging from:
fracture soil: and (3) cement: slag: steel slag: gypsum: sodium sulfate: water=1200 (30-110): (110-30): (7-100): (4-15): (2-15): (700-900);
the length range of the sisal fibers in the sisal fibers and biochar modified soil is 10-30mm, the doping amount of the sisal fibers is 0.1% -0.5%, and the doping amount of the biochar is 4% -10%.
The PAM+Na 2 SO 4 The PAM doping amount in the improved soil ranges from 0.01% to 0.15%, and the sodium sulfate doping amount ranges from 0.5% to 3%.
4. The ecological slope protection structure of a split soil slope according to claim 1, wherein the split soil comprises at least one of red clay, expansive soil, loess and other swelling clay.
5. A method of constructing an ecological slope protection structure for a split soil slope according to claim 1, comprising the steps of:
(1) Digging according to the designed slope rate, drilling holes at the appointed position of the slope, implanting reinforcing steel bars, and binding wire netting on the reinforcing steel bars to enable the wire netting to be parallel to the slope;
(2) Mixing solidified soil, spreading the solidified soil on a slope of the fractured soil, manually rolling and compacting, covering a plastic film, and curing for 7-14 days;
(3) Mixing sisal fiber and biochar modified soil, paving the sisal fiber and biochar modified soil on a solidified soil layer, and manually rolling and compacting;
(4) Mixing PAM+Na 2 SO 4 The improved soil is paved on a sisal fiber and biochar improved soil layer and is manually leveled;
(5) At PAM+Na 2 SO 4 Grass seeds are sowed on the improved soil layer, and the improved soil layer is covered with a plastic film for maintenance for 7-14 days after being watered.
6. The ecological slope protection construction method for the fissured soil side slope is characterized by comprising the following steps of:
step 1, identifying a fracture soil slope
Collecting soil samples on a side slope field of suspected fracture soil, air-drying, carrying out a particle analysis experiment, a liquid-plastic limit experiment and a shrinkage experiment, determining whether the side slope soil belongs to cohesive soil and whether the linear shrinkage is greater than 2.5% according to experimental indexes, and if the side slope soil is cohesive soil and the linear shrinkage is greater than 2.5%, determining that the side slope soil is fracture soil;
step 2, laboratory improved soil manufacturing and detection
Step 2.1, solidifying the soil
Collecting a slope crack soil sample, taking slag, cement, gypsum, steel slag and sodium sulfate as curing agent materials, adding water, fully mixing, compacting and forming, curing for 28 days, performing an unconfined compression test and a fluidity test, testing the compression strength and fluidity of the cured soil, and determining the optimal cured soil mixing ratio according to the comprehensive performance of the cured soil;
step 2.2, sisal fiber and biochar modified soil
Sisal fibers with different lengths and different doping amounts and biochar with different doping amounts are selected to be uniformly doped into the fractured soil, the samples are compacted and prepared after stewing for 48 hours, an indoor cracking test is carried out, the fracture rate and the average fracture width index of the samples are measured, and the optimal doping amount and the optimal mixing ratio are determined according to the experimental indexes;
step 2.3, PAM+Na2SO4 soil improvement
Selecting different doping amounts of PAM and Na 2 SO 4 Respectively carrying out dry blending and liquid blending into the fractured soil, stewing for 48 hours, compacting and preparing samples, then curing for 28 days, carrying out unconfined compression resistance and disintegration test, measuring compression strength and disintegration time index, and determining the optimal blending mode and the optimal blending amount of the additive according to the experimental index;
step 3, site construction
Step 3.1, preparation for construction
Excavating a side slope on site according to the designed side slope rate, finishing and forming, and drawing a crack soil side slope area needing to be reinforced; manufacturing an iron wire net sheet; taking a field fractured soil sample, measuring the water content, and doping different modifying agents into the fractured soil according to the optimal doping amount and the optimal mixing ratio determined in the step 2 to obtain different modified soil for standby;
step 3.2, wire netting construction
Firstly, measuring and paying off a fracture soil slope, determining the position of a steel bar to be anchored, then inserting the steel bar at a designated position, requiring stability without loosening, and finally binding an iron wire net on the anchored steel bar, wherein the distance between the iron wire net and a slope surface is required to be 60-70mm;
step 3.3, construction of the solidified soil layer
Pouring prepared solidified soil on the slope surface from top to bottom along the wire netting layer by layer, manually compacting and trowelling, ensuring that the surface height difference is not more than 20mm, ensuring that the thickness of a solidified soil layer is 80-120mm, and covering the surface with a film for curing;
step 3.4, sisal fiber and biochar improved soil layer construction
After curing the solidified soil layer for one week to form primary strength, performing construction on the sisal fiber and biochar modified soil layer, paving the sisal fiber and biochar modified soil prepared on site in a layered manner from the slope bottom to the slope top along the slope surface, and adopting manual compaction molding to ensure that the surface is primarily smooth, the surface height difference is not more than 20mm, and the sisal fiber and biochar modified soil layer thickness is 40-60mm;
step 3.5, PAM+Na 2 SO 4 Improved soil layer construction
PAM+Na prepared on site 2 SO 4 The improved soil is paved on a sisal fiber and biochar improved soil layer in two layers from the slope bottom to the slope top along the slope surface, wherein the lower layer is compacted manually and has the thickness of 70-90mm, and the upper layer is not compacted and has the thickness of 15-22mm;
step 3.6, construction of vegetation layer
At PAM+Na 2 SO 4 The surface of the improved soil layer is spread with grass seeds which are suitable for local growth, and then PAM+Na is carried out 2 SO 4 Spraying water on the improved soil layer to tightly bond the grass seeds and the soil layer, and finally covering a plastic film for curing for 7-14 days;
step 4, ecological slope protection completion acceptance
And 3, after finishing 3-6 months, forming a vegetation layer after the grass seeds grow, and carrying out completion acceptance of ecological slope protection, wherein the completion acceptance comprises detection of the evenness, the integrity, the vegetation growth rate and the height of the slope.
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| KR101179582B1 (en) * | 2011-11-17 | 2012-09-05 | 주식회사 예승종합기술공사 | A Method for reinforcing soil ground slope by using improved soil |
| CN113897978A (en) * | 2021-10-08 | 2022-01-07 | 中核大地勘察设计有限公司 | Ecological spraying and grouting slope vegetation restoration method |
| CN113981993A (en) * | 2021-07-29 | 2022-01-28 | 长沙理工大学 | Fissure soft rock slope ecological protection structure and prevention and control method thereof |
| CN114031338A (en) * | 2021-11-16 | 2022-02-11 | 长江水利委员会长江科学院 | Cement modified expansive soil, preparation method thereof and cement modified expansive soil ecological base material |
| CN114467398A (en) * | 2021-12-23 | 2022-05-13 | 南京农业大学 | Improvement method and application of coastal viscous saline-alkali soil |
| CN116335166A (en) * | 2023-03-15 | 2023-06-27 | 长沙理工大学 | Expansive soil slope ecological protection structure and method |
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2023
- 2023-07-13 CN CN202310856300.9A patent/CN116837875A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101179582B1 (en) * | 2011-11-17 | 2012-09-05 | 주식회사 예승종합기술공사 | A Method for reinforcing soil ground slope by using improved soil |
| CN113981993A (en) * | 2021-07-29 | 2022-01-28 | 长沙理工大学 | Fissure soft rock slope ecological protection structure and prevention and control method thereof |
| CN113897978A (en) * | 2021-10-08 | 2022-01-07 | 中核大地勘察设计有限公司 | Ecological spraying and grouting slope vegetation restoration method |
| CN114031338A (en) * | 2021-11-16 | 2022-02-11 | 长江水利委员会长江科学院 | Cement modified expansive soil, preparation method thereof and cement modified expansive soil ecological base material |
| CN114467398A (en) * | 2021-12-23 | 2022-05-13 | 南京农业大学 | Improvement method and application of coastal viscous saline-alkali soil |
| CN116335166A (en) * | 2023-03-15 | 2023-06-27 | 长沙理工大学 | Expansive soil slope ecological protection structure and method |
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