CN112627203A - Construction method of ecological protection structure of soil slope - Google Patents
Construction method of ecological protection structure of soil slope Download PDFInfo
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- CN112627203A CN112627203A CN202011558622.8A CN202011558622A CN112627203A CN 112627203 A CN112627203 A CN 112627203A CN 202011558622 A CN202011558622 A CN 202011558622A CN 112627203 A CN112627203 A CN 112627203A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- 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
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
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- 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
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- 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
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- 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
- A01G24/22—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material containing plant material
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- 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
- A01G24/28—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material containing peat, moss or sphagnum
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/30—Flood prevention; Flood or storm water management, e.g. using flood barriers
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Health & Medical Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Botany (AREA)
- General Health & Medical Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Toxicology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Cultivation Of Plants (AREA)
Abstract
The invention discloses a construction method of an ecological protection structure of a soil slope, which adopts artificial water repellent soil to cover the surface layer of the slope so as to increase the surface runoff of the slope and reduce the infiltration of rainwater, so that the water content of the soil of the slope is basically not changed and the purpose of stabilizing the slope is achieved. The method comprises the following steps: after leveling and brushing the surface layer of the soil slope, excavating a slope surface drainage system; spreading and fixing the galvanized rhombic metal net or the high-strength plastic geotechnical net from top to bottom; stirring the artificial water repellent soil and water to prepare a fluid plastic mixture, and uniformly spraying the fluid plastic mixture on the whole net surface; adopting cement mortar or concrete to pour a drainage system; spraying the prepared foreign soil onto a water repellent soil layer; the seeds and the slow release fertilizer are stirred and sprayed to the surface of the foreign soil, and the soil is maintained regularly. The selected material is ecological and environment-friendly, can be obtained from local materials, has simple preparation process and simple and convenient construction operation, has long-term stable water repellency, and can meet the protection requirement of the slope surface of a common soil slope, and the growth of vegetation on the upper layer is not influenced by the water repellent soil on the bottom layer.
Description
Technical Field
The invention belongs to the field of slope protection engineering, and particularly relates to a construction method of an ecological protection structure of a soil slope in slope engineering.
Background
The strength parameter reduction and the water pressure and permeability increase caused by the soil moisture change are one of the important reasons for generating soil slope instability, and the seepage prevention requirement is higher. The traditional impermeable materials such as geomembranes, concrete impermeable walls and the like have the defects of high production cost, complex construction process, easy aging of materials and the like, are easy to damage the ecological environment and influence the engineering construction and operation. On the other hand, how to treat a large amount of spoil generated by engineering construction is also a troublesome problem in engineering. If the engineering waste soil can be artificially subjected to water repellency so that the engineering waste soil has stable water repellency, the waste can be changed into valuable, the engineering waste soil is used for protecting the slope surface of the soil slope, the influence of rainfall evaporation and the like on the water content of the soil on the slope is reduced, and the soil slope is further ensured to be in a long-term stable state.
Disclosure of Invention
The invention provides a construction method of an ecological protection structure of a soil slope, aiming at the current situations of high seepage-proofing cost, complicated construction process, poor long-term seepage-proofing performance and the like of the traditional soil slope protection structure.
A construction method of an ecological protection structure of a soil slope is characterized by comprising the following steps:
(1) leveling the surface layer of the soil slope, brushing the slope, and performing arc treatment on corners of a slope toe and a slope top;
(2) excavating and building a drainage system according to design requirements, and temporarily not pouring and forming;
(3) spreading and fixing the galvanized rhombic metal net or the high-strength plastic geotechnical net from top to bottom. The net surface of the rear edge of the slope top extends to the outer side of the intercepting ditch by not less than 2m, and the net surface of the front edge of the slope toe extends to the outer side of the intercepting ditch by not less than 1 m;
(4) stirring the artificial water repellent soil and water to prepare a fluid plastic mixture, and uniformly spraying the fluid plastic mixture on the whole net surface, wherein the thickness is not less than 3cm, and the compactness is not less than 80%;
(5) adopting cement mortar not lower than M3 or concrete not lower than C25 for pouring a drainage system, and performing arc treatment on corners;
(6) spraying the prepared foreign soil onto a water repellent soil layer, wherein the thickness is not less than 2cm, and the compactness is not less than 80%; the extension of the rear edge of the slope top and the front edge of the slope toe are not less than 1 m;
(7) stirring the seeds and slow release fertilizer and other materials into slurry, uniformly spraying the slurry on the surface of the foreign soil, and ensuring that the thickness of the whole water repellent soil on the slope surface is not less than 100 mm;
(8) the slope is maintained regularly until the engineering requirements are met.
Further, in the construction method of the ecological protection structure of the soil slope, in the step (1), the surface layer of the slope is processed in a transverse slope brushing mode so as to ensure that the water repellent soil is tightly meshed with the slope surface.
Further, in the construction method of the ecological protection structure of the soil slope, in the steps (2) and (5), the drainage system is designed and constructed according to the current technical code of building slope engineering.
Further, in the construction method of the ecological protection structure of the soil slope, in the step (3), the net is spread from top to bottom during construction. The adjacent metal nets or the geotechnical nets are respectively connected by iron wires or U-shaped steel bars, and the joint of the two nets is overlapped and is not less than 5 cm; hard cushion blocks are uniformly arranged between the net and the slope surface at a certain interval, so that the net is suspended on the slope surface by not less than 2cm, and the covering thickness of the hydrophobic soil meets the engineering requirements.
Further, in the construction method of the ecological protection structure of the soil slope, in the step (4), the artificial water repellent soil can be prepared by adopting the anionic amine salts, and the water content is required to enable the soil body to reach a soft plastic state, so that a good spraying effect is ensured; soft plastic means that the liquidity index of the mixture is between 0.75 and 1. Generally, the mass water content is equal to or more than 20%, and when the mass water content is within the range, the mixture has obvious water repellency and soft plastic state.
Further, in the construction method of the ecological protection structure of the soil slope, in the step (6), the alien soil is mainly formed by mixing peat, humus soil, vegetation fiber, slow-release nutrient fertilizer and other materials with water in proportion, and is sprayed and sown on a water repellent soil layer after being stirred by a specific machine.
Further, in the construction method of the ecological protection structure of the soil slope, in the step (7), according to the conditions of the soil dressing component, the climate condition, the construction factor and the like, proper vegetation type seeds are selected, and are stirred with the vegetation fiber, the adhesive, the water-retaining agent, the slow-release nutrient fertilizer, the water and the like in proportion to form slurry, and then the slurry is sprayed on the soil dressing layer.
Further, in the construction method of the ecological protection structure of the soil slope, in the step (8), materials such as non-woven fabrics and the like can be adopted to cover the spray-seeding surface, and watering and maintenance are carried out periodically until vegetation grows normally.
The invention has the advantages that the artificial water repellent soil is used for replacing the traditional slope impermeable material, and compared with the prior art, the invention has the following advantages:
1) the selected materials are easy to obtain, low in price, ecological and environment-friendly, and can be obtained and prepared from local materials;
2) the anti-seepage core layer is artificial water repellent soil, has strong environmental adaptability, can be constructed by adopting conventional methods and equipment, does not influence the field construction progress, and does not increase the construction cost.
Drawings
FIG. 1 is a flow chart of a construction method of an ecological protection structure of a soil slope.
Fig. 2 is a schematic view of the ecological protection structure of the soil slope.
Detailed Description
According to the advantages of non-toxicity, high stability, good adaptability and the like of the anionic water repellent agent, the anionic water repellent agent and remolded soil are prepared into artificial water repellent soil according to requirements and then cover the surface layer of the side slope, so that the runoff of the surface of the side slope is increased, the infiltration of rainwater is reduced, and the water content of the soil of the side slope is basically not changed, thereby achieving the purpose of stabilizing the side slope.
According to the above principle, the present invention designs the following implementation steps according to the method and structure shown in fig. 1 and 2:
(1) and after the side slope is leveled and brushed, a drainage system is built in advance according to design requirements, and pouring and forming are not performed for the time. The surface layer of the side slope is processed by adopting a transverse slope brushing mode, and the concrete slope brushing mode has a step shape, a saw tooth shape and the like, so that the meshing degree of the water repellent soil and the slope surface is enhanced, and the integrity is improved; and performing arc treatment on corners of the slope toe and the slope top.
(2) Spreading and fixing the galvanized rhombic metal net or the high-strength plastic geotechnical net from top to bottom. The adjacent metal nets or the geotechnical nets are respectively connected by iron wires or U-shaped steel bars, and the joint of the two nets is overlapped and not less than 5 cm. The hard cushion blocks are uniformly arranged between the net and the slope surface at a certain interval, so that the net is suspended on the slope surface by not less than 2cm, and the covering thickness of the hydrophobic soil meets the design requirement. The net surface of the rear edge of the slope top extends to the outer side of the intercepting ditch by not less than 2m, and the net surface of the front edge of the slope toe extends to the outer side of the intercepting ditch by not less than 1 m.
(3) The artificial water repellent soil and water are stirred to prepare a fluid plastic mixture, and the fluid plastic mixture is uniformly sprayed on the whole net surface, wherein the thickness is not less than 3cm, and the compactness is not less than 80%. The water repellent soil is prepared by adopting anionic amine salts, and the water content of the soil body is required to be in a soft plastic state, so that the spraying effect is good; soft plastic means that the liquidity index of the mixture is between 0.75 and 1. Generally, the mass water content is equal to or more than 20%, and when the mass water content is within the range, the mixture has obvious water repellency and soft plastic state.
(4) And (3) pouring the drainage system by adopting cement mortar (not less than M3) or concrete (not less than C25), and performing arc treatment on corners. The construction is designed according to the current technical code of building slope engineering.
(5) Peat, humus soil, grass and wood fiber, a slow-release nutrient fertilizer and other materials are mixed with water in proportion to prepare alien soil, the alien soil is sprayed and sowed on a water repellent soil layer after being stirred by a specific machine, the thickness of the alien soil is not less than 2cm, the compactness is not less than 80%, and the extension of the rear edge of a slope top and the front edge of a slope toe is not less than 1 m.
(6) According to the conditions of soil dressing components, climatic conditions, construction factors and the like, proper vegetation type seeds are selected, and are stirred with the vegetation fibers, the adhesive, the water-retaining agent, the slow-release nutrient fertilizer, the water and the like in proportion to form slurry, and then the slurry is sprayed to the surface of the soil dressing layer, and the thickness of the whole soil repellent to the surface of the slope is not less than 100 mm.
(7) The spraying surface is covered by materials such as non-woven fabrics, and the vegetation is watered and maintained regularly until the vegetation grows normally.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the concept of the present invention, and these modifications and decorations are also regarded as the protection scope of the present invention.
Claims (8)
1. A construction method of an ecological protection structure of a soil slope is characterized by comprising the following steps:
(1) leveling the surface layer of the soil slope, brushing the slope, and performing arc treatment on corners of a slope toe and a slope top;
(2) excavating and building a drainage system according to design requirements, and temporarily not pouring and forming;
(3) spreading and fixing the galvanized rhombic metal net or the high-strength plastic geotechnical net from top to bottom; the net surface of the rear edge of the slope top extends to the outer side of the intercepting ditch by not less than 2m, and the net surface of the front edge of the slope toe extends to the outer side of the intercepting ditch by not less than 1 m;
(4) stirring the artificial water repellent soil and water to prepare a fluid plastic mixture, and uniformly spraying the fluid plastic mixture on the whole net surface, wherein the thickness is not less than 3cm, and the compactness is not less than 80%;
(5) adopting cement mortar not lower than M3 or concrete not lower than C25 for pouring a drainage system, and performing arc treatment on corners;
(6) spraying the prepared foreign soil onto a water repellent soil layer, wherein the thickness is not less than 2cm, and the compactness is not less than 80%; the extension of the rear edge of the slope top and the front edge of the slope toe are not less than 1 m;
(7) stirring the seeds and the slow release fertilizer into slurry, uniformly spraying the slurry on the surface of the foreign soil, and ensuring that the thickness of the whole water repellent soil on the slope surface is not less than 100 mm;
(8) the slope is maintained regularly until the engineering requirements are met.
2. The soil slope ecological protection structure construction method of claim 1, characterized in that: in the step (1), the surface layer of the side slope is processed in a transverse slope brushing mode to ensure that the water repellent soil is tightly occluded with the slope surface.
3. The soil slope ecological protection structure construction method of claim 1, characterized in that: in the steps (2) and (5), the drainage system is designed and constructed according to the existing technical code of building slope engineering.
4. The soil slope ecological protection structure construction method of claim 1, characterized in that: in the step (3), the net is spread from top to bottom during construction; the adjacent metal nets or the geotechnical nets are respectively connected by iron wires or U-shaped steel bars, and the joint of the two nets is overlapped and is not less than 5 cm; hard cushion blocks are uniformly arranged between the net and the slope surface at a certain interval, so that the net is suspended on the slope surface by not less than 2cm, and the covering thickness of the hydrophobic soil meets the engineering requirements.
5. The soil slope ecological protection structure construction method of claim 1, characterized in that: in the step (4), the anionic amine salts can be adopted to prepare the artificial water repellent soil, and the water content is required to enable the soil body to reach a soft plastic state, so that a good spraying effect is ensured; soft plastic means that the liquidity index of the mixture is between 0.75 and 1; the water content of the mixture is not less than 20% by mass, and when the water content of the mixture is within the range, the mixture has obvious water repellency and soft plastic state.
6. The soil slope ecological protection structure construction method of claim 1, characterized in that: in the step (6), the soil dressing is prepared by mixing peat, humus soil, plant fiber, slow-release nutrient fertilizer and water in proportion; mechanically stirring and spraying onto the water repellent soil layer.
7. The soil slope ecological protection structure construction method of claim 1, characterized in that: in the step (7), proper vegetation type seeds are selected according to the soil dressing components, climatic conditions and construction factors, and are stirred with the vegetation fibers, the adhesive, the water-retaining agent, the slow-release nutrient fertilizer and the water in proportion to form slurry which is sprayed on the soil dressing layer.
8. The soil slope ecological protection structure construction method of claim 1, characterized in that: in the step (8), non-woven fabrics can be adopted to cover the spray-seeding surface, and watering and maintenance are carried out regularly until the vegetation grows normally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011558622.8A CN112627203A (en) | 2020-12-25 | 2020-12-25 | Construction method of ecological protection structure of soil slope |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011558622.8A CN112627203A (en) | 2020-12-25 | 2020-12-25 | Construction method of ecological protection structure of soil slope |
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| CN112627203A true CN112627203A (en) | 2021-04-09 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04102621A (en) * | 1990-08-20 | 1992-04-03 | Sogo Riyokuka Kk | Surface soil protection sheet and soil erosion protection method |
| CN104264694A (en) * | 2014-09-29 | 2015-01-07 | 南京赛伯通建筑工程有限公司 | Expansive soil slope and construction method |
| JP2016146787A (en) * | 2015-02-12 | 2016-08-18 | 多機能フィルター株式会社 | Water barrier greening sheet |
| CN108385701A (en) * | 2018-03-14 | 2018-08-10 | 中建五局土木工程有限公司 | Road Protection of Expansive Soil structure and its construction method |
| CN109629580A (en) * | 2018-12-04 | 2019-04-16 | 昆明理工大学 | A kind of side slope surface seepage prevention design method |
| CN111197299A (en) * | 2020-01-14 | 2020-05-26 | 南昌航空大学 | Preparation and construction method of geotechnical impermeable material |
-
2020
- 2020-12-25 CN CN202011558622.8A patent/CN112627203A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04102621A (en) * | 1990-08-20 | 1992-04-03 | Sogo Riyokuka Kk | Surface soil protection sheet and soil erosion protection method |
| CN104264694A (en) * | 2014-09-29 | 2015-01-07 | 南京赛伯通建筑工程有限公司 | Expansive soil slope and construction method |
| JP2016146787A (en) * | 2015-02-12 | 2016-08-18 | 多機能フィルター株式会社 | Water barrier greening sheet |
| CN108385701A (en) * | 2018-03-14 | 2018-08-10 | 中建五局土木工程有限公司 | Road Protection of Expansive Soil structure and its construction method |
| CN109629580A (en) * | 2018-12-04 | 2019-04-16 | 昆明理工大学 | A kind of side slope surface seepage prevention design method |
| CN111197299A (en) * | 2020-01-14 | 2020-05-26 | 南昌航空大学 | Preparation and construction method of geotechnical impermeable material |
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Application publication date: 20210409 |