CN114525818B - Construction method of combined impermeable body with horizontal impermeable and vertical impermeable functions - Google Patents
Construction method of combined impermeable body with horizontal impermeable and vertical impermeable functions Download PDFInfo
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- CN114525818B CN114525818B CN202210130133.5A CN202210130133A CN114525818B CN 114525818 B CN114525818 B CN 114525818B CN 202210130133 A CN202210130133 A CN 202210130133A CN 114525818 B CN114525818 B CN 114525818B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
- A01B79/02—Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/002—Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/004—Sealing liners
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
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- Structural Engineering (AREA)
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- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
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- Health & Medical Sciences (AREA)
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- Water Supply & Treatment (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a construction method of a combined impermeable body with horizontal impermeable and vertical impermeable, wherein the adopted combined impermeable body comprises a vertical impermeable wall (7), a composite impermeable engineering structure (9) and a horizontal impermeable system; the composite impermeable engineering structure (9) is composed of a vertical impermeable inner wall (9-1), an inner wall covering plate (9-3) which is arranged on the upper part of the vertical impermeable inner wall and extends to one side of a solid waste storage yard/polluted site, a vertical impermeable outer wall (9-2) and an outer wall covering plate (9-4) which is arranged on the upper part of the vertical impermeable outer wall and extends outwards; the horizontal seepage-proofing system is composed of a basic layer (5), a seepage-proofing material protection layer (4), a horizontal seepage-proofing layer (3), an ecological base layer (2) and an ecological layer (1) from bottom to top. The invention is suitable for solid waste piles of different shapes, such as on the ground, pits and depressions, is particularly suitable for application under the condition that the solid waste is much higher than the ground, meets the process requirements of horizontal seepage prevention and vertical seepage prevention, saves clay resources, reduces the using amount of earthwork, and has simple and convenient construction, low cost and good effect.
Description
Technical Field
The invention belongs to the technical field of construction of environment protection anti-seepage engineering, and particularly relates to a construction method with a horizontal anti-seepage and vertical anti-seepage combined structure, which is suitable for anti-seepage treatment of solid waste piles/polluted sites with different shapes, such as on-ground, pits and mountain-depression piled solid waste sites, and is particularly suitable for the situation that the solid waste piles are much higher than the ground.
Background
For historical reasons, many businesses have generated large amounts of solid waste during the production process, such as steel slag from steel mills, copper smelting waste, stripped waste rock (earth) from mining, and the like. The generated industrial solid wastes are not treated in time and are effectively utilized, so that the storage capacity of the industrial solid wastes in partial areas is rapidly increased, and huge pressure is brought to the surrounding environment. The industrial solid waste storage sites have large quantity and various types, the comprehensive utilization way is very few, the storage quantity is large, a large amount of solid waste is stored for a long time to form solid waste storage sites such as dressing and smelting slag sites, soil discharge sites and the like, a large amount of land is occupied, rainwater enters the solid waste storage sites to generate harmful wastewater, and then the harmful wastewater enters underground water or leaks out, so that the safety of a local water system is seriously influenced, the soil quality is damaged, the plant growth is influenced, and the local environmental quality is damaged.
Currently, the main methods for disposing of these solid wastes are: the impermeable methods adopted by the method comprise horizontal impermeable and vertical impermeable.
For the landfill of different places, only a small amount of solid waste is feasible under the conditions of environmental protection, safety and reliability; for historical reasons, on-site management is also a viable approach for large amounts of already existing solid wastes.
The horizontal seepage prevention is to build an impermeable layer on the surface of the solid waste storage yard in the horizontal direction, prevent rainwater or external fresh water from entering the solid waste storage layer below, and avoid the pollution of solid waste to generate new wastewater to pollute underground water.
The vertical seepage prevention is to build a vertical barrier (seepage prevention wall) around the solid waste storage yard or in a certain depth range of the downstream of underground water flow, so as to prevent the polluted water flow from diffusing and migrating to other water areas to pollute the surrounding water area.
At present, the vertical seepage prevention and the horizontal seepage prevention treatment of the wastewater generated by solid waste are respectively treated, and the construction method adopting the vertical seepage prevention and the horizontal seepage prevention measures respectively has the advantages of long construction period, complex construction and high cost. How to combine the horizontal seepage prevention and the vertical seepage prevention mutually, and construct a horizontal seepage prevention and vertical seepage prevention combined structure system together, has important significance for saving clay resources, reducing the use amount of earthwork, simplifying construction procedures and improving seepage prevention effect.
Disclosure of Invention
The invention aims to solve the problems of poor seepage prevention effect, long construction period, complex construction procedures and high cost in the prior art, and provides a construction method of a combined seepage prevention body with horizontal seepage prevention and vertical seepage prevention, which can save clay resources, reduce the use amount of earthwork, has simple and convenient construction, low construction cost and good seepage prevention effect.
In order to achieve the above purpose, the construction method of the combined impermeable body with horizontal impermeable and vertical impermeable functions is implemented by adopting the following technical scheme:
the invention relates to a construction method of a combined impermeable body with horizontal impermeable and vertical impermeable, which comprises the steps of vertical impermeable walls, a composite impermeable engineering structure and a horizontal impermeable system; the composite impermeable engineering structure consists of a vertical impermeable inner wall, an inner wall covering plate, a vertical impermeable outer wall and an outer wall covering plate, wherein the upper part of the vertical impermeable inner wall extends to one side of a solid waste storage yard/polluted site; the vertical impervious wall is positioned at the lower part of the position between the vertical impervious inner wall and the vertical impervious outer wall, a vertical impervious bonding layer is arranged at the bottom between the vertical impervious inner wall and the vertical impervious outer wall, and a concave space formed by the vertical impervious inner wall, the vertical impervious outer wall and the vertical impervious bonding layer is a horizontal impervious rainwater collecting and discharging space; the horizontal seepage-proofing system is positioned on the solid waste storage yard/pollution site stratum of the vertical seepage-proofing inner wall, which is close to one side of the solid waste storage yard/pollution site, and is composed of a base layer, a seepage-proofing material protection layer, a horizontal seepage-proofing layer, an ecological base layer and an ecological layer combination from bottom to top; determining the space size of a horizontal seepage-proof rainwater collection and drainage space according to regional environment remediation and rainwater collection and drainage calculation; the construction method comprises the following steps:
1) Defining a vertical seepage-proofing line at the outer edge of a solid waste storage yard/pollution site needing horizontal seepage-proofing and vertical seepage-proofing, and leveling the site of the solid waste storage yard/pollution site stratum according to the design elevation and gradient requirements;
2) Constructing a composite seepage-proofing engineering structure according to the position of the vertical seepage-proofing line; the composite seepage-proofing engineering structure is formed by adopting a reinforced concrete structure and pouring concrete after supporting a formwork and binding reinforcing steel bars;
3) After the stable acceptance of the composite impervious engineering structure, constructing a vertical impervious wall, wherein the vertical impervious wall adopts plain concrete or triaxial cement mixing piles or high-pressure jet grouting piles;
4) Construction of a base layer and a seepage-proof material protection layer: the foundation layer adopts mixed filling soil, and is compacted in layers, and the compaction density is not less than 0.95; the protective layer of the seepage-proofing material adopts plain soil, the plain soil is leveled and compacted, and impurities such as organic matters, crushed stone, grass and wood dust and the like cannot be contained in the plain soil;
5) Paving a horizontal impermeable layer, wherein the horizontal impermeable layer adopts a high-density polyethylene HDPE geotechnical impermeable film, and a geotechnical cloth protective layer is added on the horizontal impermeable layer;
6) Constructing an ecological base layer, wherein the ecological base layer adopts planting soil, plants are planted on the planting soil to form an ecological layer, and the plant variety is determined according to the requirements of regional ecological environment protection and greening;
7) And constructing a vertical seepage-proofing bonding layer, wherein the vertical seepage-proofing bonding layer adopts plain concrete.
Further, the adopted combined seepage-proofing body also comprises a horizontal cover plate, wherein the horizontal cover plate adopts a concrete cover plate, and the horizontal cover plate covers the vertical seepage-proofing inner wall and the vertical seepage-proofing outer wall; the horizontal cover plate is provided with a grate hole for rainwater to permeate.
Comprehensively considering the seepage-proofing effect and the construction cost, wherein the permeability coefficient of the vertical seepage-proofing wall is less than 1x10 -7 The depth of the vertical impervious wall needs to reach that the permeability coefficient is less than 1x10 -7 Is prevented from penetrating into soil layers with penetration coefficient smaller than 1x10 -7 The thickness of the impermeable soil layer is not less than 1000mm.
According to the experimental study results and comparison, the thickness B1 of the vertical impermeable inner wall and the vertical impermeable outer wall is 150-200 mm, the thickness B2 of the vertical impermeable wall is 600-800 mm, the thickness H3 of the inner wall cover plate and the outer wall cover plate is 150-200 mm, and the height H4 of the vertical impermeable inner wall and the vertical impermeable outer wall is 1300-1800 mm.
Further, the thickness of the base layer is 400-600 mm, and the thickness of each layer compacted by layering is not more than 200mm; the thickness of the anti-seepage material protective layer is 150-250 mm; the thickness of the ecological base layer is 420-560 mm.
Further, drain holes for draining rainwater in the horizontal impermeable layer into the horizontal impermeable rainwater collecting and draining space are arranged in the inner wall covering plate at intervals, and the drain holes and the inner wall covering plate are constructed synchronously.
Further, the horizontal impermeable layer is preferably a high-density polyethylene HDPE geotechnical impermeable film with the thickness of 1.5 mm.
After the technical scheme is adopted by the construction method of the combined seepage-proofing body with the horizontal seepage-proofing and the vertical seepage-proofing, the construction method has the following positive effects:
(1) The combined impermeable body is formed by adopting the vertical impermeable wall, the composite impermeable engineering structure and the horizontal impermeable system, so that the process requirements of horizontal impermeable and vertical impermeable are simultaneously met, the construction flow of the whole treatment area is optimized, the perfect combination of horizontal impermeable and vertical impermeable is realized, natural rainwater (or other ground water bodies) is effectively prevented from entering underground soil, and the generation of new polluted water is stopped;
(2) The organic combination of horizontal seepage prevention and vertical seepage prevention effectively prevents the sewage generated by the original solid waste from polluting other soil or water body of underground water;
(3) The horizontal seepage-proofing system is composed of a base layer, a seepage-proofing material protection layer, a horizontal seepage-proofing layer, an ecological base layer and an ecological layer from bottom to top, so that the horizontal seepage-proofing requirement of the solid waste storage yard/polluted site can be met, the ecology of the solid waste storage yard/polluted site is repaired, and the greening and beautifying of the solid waste storage yard/polluted site are realized;
(4) The vertical seepage-proofing system consists of a vertical seepage-proofing wall positioned at the bottom, a vertical seepage-proofing inner wall positioned at the upper part, a vertical seepage-proofing outer wall double-layer structure and a vertical seepage-proofing combination layer, and has good vertical seepage-proofing effect and convenient construction;
(5) the invention can be flexibly applied, is applicable to solid waste piles with different shapes, such as land, pits and hills, and is particularly applicable to the situation that the solid waste is much higher than the ground.
(6) Compared with the horizontal seepage prevention and vertical seepage prevention separation technology, the combined seepage prevention structure technology can save more than 30% of civil engineering cost, and can effectively save land use area, thereby saving land resources.
Drawings
FIG. 1 is a cross-sectional view of a composite impermeable body designed by a construction method of the composite impermeable body with horizontal and vertical impermeable properties;
FIG. 2 is a cross-sectional view of a composite impermeable body of the present invention having a horizontal impermeable and a vertical impermeable for use in a solid waste yard;
fig. 3 is a schematic view of a horizontal cover plate according to the present invention.
Reference numerals: 1-an ecological layer; 2-an ecological base layer; 3-a horizontal barrier layer; 4-a protective layer of impermeable material; 5-a base layer; 6-solid waste yard/contaminated site formation; 7-vertical impervious wall; 8-a vertical impermeable bond layer; 9-a composite seepage-proofing engineering structure; 9-1-a vertical impermeable inner wall; 9-2-vertical impermeable outer walls; 9-3-inner wall cladding panels; 9-4 of an outer wall covering plate; 10-collecting the horizontal seepage-proof rainwater in the drainage space; 11-horizontal cover plate.
Detailed Description
In order to further describe the present invention, a construction method of a combined impermeable body having a horizontal impermeable and a vertical impermeable will be described in further detail with reference to the accompanying drawings.
The combined impervious body structure cross section designed by the construction method of the combined impervious body with horizontal impervious and vertical impervious shown in fig. 1 is combined with fig. 2 and 3, and the combined impervious body designed by the invention is formed by combining a vertical impervious wall 7, a composite impervious engineering structure 9, a horizontal impervious system and a horizontal cover plate 11; the composite impermeable engineering structure 9 consists of a vertical impermeable inner wall 9-1, an inner wall covering plate 9-3, a vertical impermeable outer wall 9-2 and an outer wall covering plate 9-4, wherein the upper part of the vertical impermeable inner wall extends to one side of a solid waste storage yard/polluted site; the vertical impervious wall 7 is positioned at the lower part of the position between the vertical impervious inner wall 9-1 and the vertical impervious outer wall 9-2, and the permeability coefficient of the vertical impervious wall 7 is less than 1x10 -7 The depth of the vertical impervious wall 7 needs to reach the penetration coefficient smaller than 1x10 -7 Is prevented from penetrating into soil layers with penetration coefficient smaller than 1x10 -7 The thickness of the impermeable soil layer is not less than 1000mm; a vertical seepage-proofing combination layer 8 is arranged at the bottom between the vertical seepage-proofing inner wall 9-1 and the vertical seepage-proofing outer wall 9-2, a concave space formed by the vertical seepage-proofing inner wall 9-1, the vertical seepage-proofing outer wall 9-2 and the vertical seepage-proofing combination layer 8 is a horizontal seepage-proofing rainwater collecting outer emptying space 10, and the space size of the horizontal seepage-proofing rainwater collecting outer emptying space 10 is determined according to regional environment remediation and rainwater collecting and discharging calculation; the horizontal cover plate 11 is a concrete cover plate, the horizontal cover plate 11 covers the vertical impermeable inner wall 9-1 and the vertical impermeable outer wall 9-2, and the horizontal cover plate 11 is provided with a grate hole for rainwater penetration; the horizontal seepage-proofing system is positioned on the solid waste storage yard/pollution site stratum 6 of the vertical seepage-proofing inner wall 9-1, which is close to one side of the solid waste storage yard/pollution siteThe horizontal seepage-proofing system is formed by combining a base layer 5, a seepage-proofing material protection layer 4, a horizontal seepage-proofing layer 3, an ecological base layer 2 and an ecological layer 1 from bottom to top.
In engineering implementation, the structural parameters of the combined seepage-proofing body are as follows: the thickness B1 of the vertical impermeable inner wall 9-1 and the vertical impermeable outer wall 9-2 is 150-200 mm, the thickness B2 of the vertical impermeable wall 7 is 600-800 mm, the thickness H3 of the inner wall cover plate 9-3 and the outer wall cover plate 9-4 is 150-200 mm, and the height H4 of the vertical impermeable inner wall 9-1 and the vertical impermeable outer wall 9-2 is 1500mm; the thickness of the base layer (5) is 500mm, and the thickness of each layer compacted by layering is not more than 200mm; the thickness of the impermeable material protective layer 4 is 200mm; the thickness of the ecological base layer 2 is 500mm.
The construction method comprises the following steps:
1) Defining a vertical seepage-proofing line at the outer edge of a solid waste storage yard/polluted site needing horizontal seepage-proofing and vertical seepage-proofing, and leveling the site of a solid waste storage yard/polluted site stratum 6 of the solid waste storage yard/polluted site according to the design elevation and gradient requirements;
2) Constructing a composite seepage-proofing engineering structure 9 according to the position of the vertical seepage-proofing line; the composite seepage-proofing engineering structure 9 is formed by adopting a reinforced concrete structure and pouring concrete after supporting a formwork and binding reinforcing steel bars; the diameter of the steel bars in the concrete is 14mm, and the distance is 200mm. The construction is carried out along the vertical impervious wall line, the measure ensures the positioning and quality of the impervious wall and the realization of the vertical impervious target;
3) After the composite impervious engineering structure 9 is stably checked and accepted, constructing a vertical impervious wall 7, wherein the vertical impervious wall 7 adopts C30 plain concrete or triaxial cement stirring piles or high-pressure jet grouting piles;
4) Construction of a base layer 5 and a seepage-proofing material protection layer 4: the foundation layer 5 adopts mixed filling soil, and is compacted and slope-found (3 per mill) in a layered manner; the impermeable material protective layer 4 adopts plain soil, the impermeable material protective layer 4 is leveled and compacted, and impurities such as organic matters, crushed stones, grass and wood dust and the like cannot be contained in the impermeable material protective layer 4;
5) Paving a horizontal impermeable layer 3, wherein the horizontal impermeable layer 3 is a high-density polyethylene HDPE geotechnical impermeable film with the thickness of 1.5mm, and a geotechnical cloth protective layer is added on the horizontal impermeable layer;
6) Constructing an ecological base layer 2, wherein the ecological base layer 2 adopts planting soil, plants are planted on the planting soil to form an ecological layer 1, and plant varieties are determined according to requirements of regional ecological environment protection and greening;
7) And constructing a vertical seepage-proofing bonding layer 8, wherein the vertical seepage-proofing bonding layer 8 adopts plain concrete.
8) The manufacture and installation of the horizontal cover plate 14 are completed.
Claims (8)
1. A construction method of a combined impermeable body with horizontal impermeable and vertical impermeable functions is characterized by comprising the following steps: the adopted combined impervious body comprises a vertical impervious wall (7), a composite impervious engineering structure (9) and a horizontal impervious system; the composite impermeable engineering structure (9) is composed of a vertical impermeable inner wall (9-1), an inner wall covering plate (9-3) which is arranged at the upper part of the vertical impermeable inner wall and extends to one side of a solid waste storage yard/polluted site, a vertical impermeable outer wall (9-2) and an outer wall covering plate (9-4) which is arranged at the upper part of the vertical impermeable outer wall and extends outwards; the vertical impervious wall (7) is positioned at the lower part of the position between the vertical impervious inner wall (9-1) and the vertical impervious outer wall (9-2), a vertical impervious bonding layer (8) is arranged at the bottom between the vertical impervious inner wall (9-1) and the vertical impervious outer wall (9-2), a concave space formed by the vertical impervious inner wall (9-1), the vertical impervious outer wall (9-2) and the vertical impervious bonding layer (8) is a horizontal impervious rainwater collecting and draining space (10), and the space size of the horizontal impervious rainwater collecting and draining space (10) is determined according to regional environment remediation and rainwater collecting and draining calculation; the horizontal seepage prevention system is positioned on a solid waste storage yard/polluted site stratum (6) on one side of a vertical seepage prevention inner wall (9-1) close to the solid waste storage yard/polluted site, and is formed by combining a base layer (5), a seepage prevention material protection layer (4), a horizontal seepage prevention layer (3), an ecological base layer (2) and an ecological layer (1) from bottom to top; the construction method comprises the following steps:
1) Defining a vertical seepage-proofing line at the outer edge of a solid waste storage yard/polluted site needing horizontal seepage-proofing and vertical seepage-proofing, and leveling the site of a solid waste storage yard/polluted site stratum (6) of the solid waste storage yard/polluted site according to the design elevation and gradient requirements;
2) Constructing a composite seepage-proofing engineering structure (9) according to the position of the vertical seepage-proofing line; the composite seepage-proofing engineering structure (9) is formed by adopting a reinforced concrete structure and pouring concrete after supporting a formwork and binding reinforcing steel bars;
3) After the composite impervious engineering structure (9) is stably checked and accepted, constructing a vertical impervious wall (7), wherein the vertical impervious wall (7) adopts plain concrete or triaxial cement stirring piles or high-pressure jet grouting piles;
4) Construction of a base layer (5) and an impermeable material protective layer (4): the foundation layer (5) adopts miscellaneous fill, and is compacted in layers; the impermeable material protective layer (4) adopts plain soil, and is leveled and compacted;
5) Paving a horizontal impermeable layer (3), wherein the horizontal impermeable layer (3) is a high-density polyethylene HDPE geotechnical impermeable film, and a geotechnical cloth protective layer is added on the horizontal impermeable layer;
6) Constructing an ecological base layer (2), wherein the ecological base layer (2) adopts planting soil, plants are planted on the planting soil to form an ecological layer (1), and plant varieties are determined according to requirements of regional ecological environment protection and greening;
7) And constructing a vertical seepage-proofing bonding layer (8), wherein the vertical seepage-proofing bonding layer (8) adopts plain concrete.
2. The method for constructing a composite impermeable body having horizontal and vertical impermeable properties according to claim 1, wherein: the adopted combined anti-seepage body further comprises a horizontal cover plate (11), wherein the horizontal cover plate (11) is a concrete cover plate, and the horizontal cover plate (11) covers the vertical anti-seepage inner wall (9-1) and the vertical anti-seepage outer wall (9-2); the horizontal cover plate (11) is provided with a grate hole for rainwater infiltration.
3. The method for constructing a composite impermeable body having horizontal and vertical impermeable properties according to claim 2, wherein: the permeability coefficient of the vertical impervious wall (7) is less than 1x10 -7 The depth of the vertical impervious wall (7) needs to reach the penetration coefficient smaller than 1x10 -7 Is prevented from penetrating into soil layers with penetration coefficient smaller than 1x10 -7 The thickness of the impermeable soil layer is not less than 1000mm.
4. A method of constructing a composite impermeable body having a horizontal barrier and a vertical barrier as defined in claim 3, wherein: the thickness B1 of the vertical impermeable inner wall (9-1) and the vertical impermeable outer wall (9-2) is 150-200 mm, the thickness B2 of the vertical impermeable wall (7) is 600-800 mm, the thickness H3 of the inner wall covering plate (9-3) and the outer wall covering plate (9-4) is 150-200 mm, and the height H4 of the vertical impermeable inner wall (9-1) and the vertical impermeable outer wall (9-2) is 1300-1800 mm.
5. The method for constructing a combined impermeable body with horizontal and vertical impermeable functions according to claim 1, 2, 3 or 4, wherein the method comprises the following steps: the thickness of the base layer (5) is 400-600 mm, and the thickness of each layer compacted by layering is not more than 200mm; the thickness of the impermeable material protective layer (4) is 150-250 mm.
6. The method for constructing a composite impermeable body having horizontal and vertical impermeable properties according to claim 5, wherein: the thickness of the ecological base layer (2) is 420-560 mm.
7. The method for constructing a composite impermeable body having horizontal and vertical impermeable properties according to claim 6, wherein: drainage holes for draining rainwater in the horizontal impermeable layer (3) into the horizontal impermeable rainwater collecting and draining space (10) are arranged in the inner wall covering plate (9-3) at intervals.
8. The method for constructing a composite impermeable body having horizontal and vertical impermeable properties according to claim 7, wherein: the horizontal impermeable layer (3) is a high-density polyethylene HDPE geotechnical impermeable film with the thickness of 1.5 mm.
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| CN108951675A (en) * | 2017-05-17 | 2018-12-07 | 北京高能时代环境技术股份有限公司 | HDPE geomembrane and bentonite-clay complex vertical cut-pff wall and its construction method of installation |
| CN111395409A (en) * | 2020-05-07 | 2020-07-10 | 北京高能时代环境技术股份有限公司 | Seepage-proofing structure for emergency site construction and construction method of seepage-proofing structure |
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2022
- 2022-02-11 CN CN202210130133.5A patent/CN114525818B/en active Active
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| JP2003001212A (en) * | 2001-06-26 | 2003-01-07 | Kumagai Gumi Co Ltd | Method confining contaminated soil into ground |
| CN205875860U (en) * | 2016-08-08 | 2017-01-11 | 北京中兰环境工程有限公司 | Prevention of seepage sheath and prevention of seepage pond |
| CN108951675A (en) * | 2017-05-17 | 2018-12-07 | 北京高能时代环境技术股份有限公司 | HDPE geomembrane and bentonite-clay complex vertical cut-pff wall and its construction method of installation |
| CN107313468A (en) * | 2017-08-14 | 2017-11-03 | 兰州有色冶金设计研究院有限公司 | A kind of seepage proof curtain for releasing collapsible loess foundation settlement by soaking is with level every infiltration level structure and method |
| CN111395409A (en) * | 2020-05-07 | 2020-07-10 | 北京高能时代环境技术股份有限公司 | Seepage-proofing structure for emergency site construction and construction method of seepage-proofing structure |
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