CN107700509A - Compound underground anti-seepage isolation wall construction and construction method - Google Patents
Compound underground anti-seepage isolation wall construction and construction method Download PDFInfo
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- CN107700509A CN107700509A CN201710941627.0A CN201710941627A CN107700509A CN 107700509 A CN107700509 A CN 107700509A CN 201710941627 A CN201710941627 A CN 201710941627A CN 107700509 A CN107700509 A CN 107700509A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
- E02D29/0258—Retaining or protecting walls characterised by constructional features
- E02D29/0275—Retaining or protecting walls characterised by constructional features cast in situ
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a kind of compound underground anti-seepage isolation wall construction and construction method.Compound underground anti-seepage isolates wall construction, and it includes vertically arranged wall, every layer be arranged in wall uses different at least two one functional layers of material, and the setting direction of functional layer is parallel with wall, and at least one layer of functional layer is membranaceous.Based on the construction method of above-mentioned compound underground anti-seepage isolation wall construction, comprise the following steps：A. the position of antiseepage divider wall need to set to excavate grooving, is injecting slurry coat method in groove, functional layer film material is laid along the line of rabbet joint, and adjacent two panels film material is spliced, in the lower suspension variable weights of film material；B. film material is slowly sunk into slurry coat method, the flatness and perpendicularity of film is kept during sinking to；C. film material is sunk into designed elevation；D. injection wall body material discharges slurry coat method in groove.
Description
Technical field
The present invention relates to a kind of compound underground anti-seepage isolation wall construction and construction method.
Background technology
In recent years, Urbanization in China is very fast, industry and municipal and environment-friendly infrastructure construction and operation management water
It is flat to relatively lag behind, cause China's Urban Underground water and soil pollution getting worse.The definition of soil pollution is：Because mankind's activity produces
Harmful, noxious material enter soil, accumulate to a certain extent, be from net energy in itself more than soil, cause soil property and matter
Amount change, forms influence and the harm to human body and ecological environment.Necessarily lead to due to the effect such as drenching with rain and washing away containing harmful
The percolate of composition, if do not taken effective seepage control measure, percolate can migrate with the seepage flow of underground water, pollute place
The pollution of surrounding ecology.Landfill Leachate Pollutants mainly include 3 types:(1) water soluble organic substance, it is represented by COD
Or total organic carbon (TOC), including volatile fatty acid and fulvic acid class and humic acids compound etc. (COD)；(2) it is special-shaped raw
The organic matter (XOCs) of material, is mainly derived from family and industrial chemicals, including a series of aromatic hydrocarbons,
Benezene material and chlorinated aliphatic hydrocarbon etc.；(3) heavy metal pollution, including Cd2+、Cr3+、Cu2+、Pb2+、Ni2+And Zn2+Deng.City
Lower water and soil pollution has following features：(1) spatial spreading is big, and it is difficult to pollute Site evaluation；(2) soil body and underground
Water pollution coexists, and soil sample chemistry former state keeps difficulty big in sampling process；(3) based on combined pollution, often there is heavy metal
Coexisted with organic pollution, it is desirable to it is wide to administer restorative procedure applicability；(4) Contaminants Transport depth is larger, complex geologic conditions,
It is high to repair difficulty.Urban Underground water and soil pollution These characteristics, which are reconnoitred, administer and repaired for it, brings huge Science and Technology
Challenge.
Divider wall early stage is mainly used in large-scale or reservoir seepage control project.With the development of technology, as shown in figure 1,
Divider wall is more and more used in pollution control engineering, and label 1 is divider wall in Fig. 1, and arrow represents that pollutant oozes
Saturating direction.Commonly using vertical divider wall engineering can following several class：Soil-bentonite divider wall, plastic concrete divider wall, commonly mix
Coagulate native divider wall (rigid concrete divider wall), Soil-cement piling wall and the compound divider wall of geomembrane-bentonite etc..No
The difference that stresses also with country to vertical divider wall type, China at present more uses cement (plastic concrete or soil cement)
Grouting curtain is as main divider wall form, to obstruct percolate in landfill yard.
Above-mentioned existing divider wall respectively has advantage and disadvantage.Form as shown in Figure 2 lists lacking for conventional vertical divider wall
Point.On the one hand, existing conventional divider wall is due to drying and watering cycle and the influence of Frozen-thawed cycled, the anti-seepage effect meeting after long service
Weaken, on the other hand, in face of increasingly complicated water and soil pollution situation, the vertical antiseepage divider wall of single structure has been difficult to meet
Complicated pollution situation.There are some researches show the presence of some heavy metals can hinder hydrated cementitious, and in a long time to cement
Firming body is exerted an adverse impact, and reduces the intensity of cut-pff wall, and through crack is produced in firming body, loses wall anti-
Isolation effect is oozed, so needing to consider the compatibility of cement and pollutant when using cement system cut-pff wall.Bentonite is although right
It is better than cement, but the cut-pff wall low intensity formed in the compatibility of pollutant, application is restricted, and answering in high concentration
The antiseepage barrier property for closing wall under the erosion of pollutant is typically difficult to the anti-seepage standard for reaching code requirement.
Although the compound divider wall permeability coefficient of geomembrane-bentonite is low, isolation effect is good, but Pollution Field in engineering
Often there is various heavy and situation that the pollutant such as organic coexists, pollution condition is extremely multiple often based on combined pollution in ground
Miscellaneous, form as shown in Figure 3, the earth working material of conventional single kind has certain limitation, and under complicated pollution condition,
Percolate and its a large amount of pollutants of carrying are easier to puncture barrier, greatly shorten service life, so this single structure
Divider wall is difficult to meet complicated every dirty antiseepage requirement.
The content of the invention
In order to solve the technical problem of the above, it is an object of the invention to propose a kind of compound underground anti-seepage divider wall knot
Structure and construction method.
In order to achieve the above object, the invention provides a kind of technical scheme：Compound underground anti-seepage isolates wall construction, it
Different at least two one functional layers of material, function are used including vertically arranged wall, be arranged in wall every layer
The setting direction of layer is parallel with wall, and at least one layer of functional layer is membranaceous.
Further, the material that functional layer uses includes butyl rubber coiled material, Polyvinyl chloride rubber roofing material, chlorosulfonation and gathered
Ethylene rubber, EPDM rubber rolling material, neoprene coiled material, polyethylene film for earthwork, high-density polyethylene geomembrane or polychlorostyrene
Ethene geomembrane.
Further, the material that functional layer uses includes polyacrylonitrile carbon based fibers film, electro spinning nanometer fiber membrane, fluorine rubber
Glue, silicon rubber, fluorosioloxane rubber, mesoporous carbon/silica composite wood, attapulgite/active carbon nanometer composite material or acrylamide
Compound high hydroscopic resin.
Further, the distance between adjacent two layers functional layer is not less than 150mm.
Further, wall uses cement-bentonite or soil-bentonite.
Present invention also offers another technical solution：It is a kind of that wall construction is isolated based on above-mentioned compound underground anti-seepage
Construction method, comprise the following steps：
A. the position of antiseepage divider wall need to set to excavate grooving, slurry coat method is being injected in groove, by functional layer film material
Laid along the line of rabbet joint, and adjacent two panels film material is spliced, in the lower suspension variable weights of film material；
B. film material is slowly sunk into slurry coat method, the flatness and perpendicularity of film is kept during sinking to；
C. film material is sunk into designed elevation；
D. injection wall body material discharges slurry coat method in groove.
Further, in step a, excavation grooving is carried out by groover.
Further, in step a, adjacent two panels film material is spliced by bonding method or hot weld connection.
Further, in step d, materials for wall is cement bentonite hardening slurry or soil-bentonite compound.
Due to using above-mentioned technical proposal, the compound underground anti-seepage isolation wall construction of the present invention and construction method, comparing existing
There is technology, there is advantages below：
1st, can be according to the species of mixed pollutants, selectively using a variety of isolation sorbing materials, in underground anti-seepage
The design phase of wall, can according to the specific pollution condition in required isolation place, select effective isolation sorbing material with it is suitable
The functional layer number of plies, make design more targeted；
2nd, functional layer and divider wall wall collective effect, the leaching of combined pollutant is effectively reduced, in new type compound
In lower antiseepage isolation wall construction, on the one hand, cut-off wall inherently has certain impermeability, on the other hand, functional layer pair
There is very big isolation adsorption capacity in pollutant, the functional layer of multiple different materials, which is used in combination, can effectively obstruct mixing dirt
Contaminate the leaching of thing.The synergy of these two aspects, the possibility that polluter leaches in place is greatly reduced, is provided for engineering
" multiple security "；
3rd, the composite construction of functional layer and materials for wall separately provides protection to functional layer, and materials for wall has obstructed dirt
The debris such as the rubble in dye place directly contact with functional layer, effectively prevent sharp hard thing to be damaged for the physics of functional layer
Wound, ensure that the service life of functional layer；
4th, by novel construction method, make various different shapes barrier sorbing material apply to that antiseepage divider wall turns into can
Can, barrier sorbing material can be generally divided into film and two kinds of forms of plate, and the present invention is directed to the construction method of film material, will not be right
The construction of board-like material impacts, to ensure the construction of this new type compound underground anti-seepage divider wall.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
Brief description of the drawings
Accompanying drawing 1 is the schematic diagram of antiseepage divider wall in the prior art；
Accompanying drawing 2 is conventional vertical divider wall defect list in the prior art；
Accompanying drawing 3 is obstructing capacity list of the earth working material for pollutant in the prior art, wherein, it is poor that P is represented, and G is represented
Well, IIR is Butyl rubber (butyl rubber), and CPE is Chlorinated polyethylene (haloflex),
CSM is Chlorosulfonated polyethylene (CSM), ECO epichlorohydrin
Copolymer (copoly type epichlorohydrin rubber), EPDM are Ethylene propylene diene monomer (ethylene-propylene-diene monomers
Glue), CR is Polychloroprene (neoprene), and PE is Polyethylene (polyethylene), PVC Polyvinyl
Chloride (polyvinyl chloride)；
Accompanying drawing 4 is compound underground anti-seepage divider wall structural representation in the present invention；
Accompanying drawing 5 isolates the structural representation of step a in the construction method of wall construction for the compound underground anti-seepage of the present invention；
Accompanying drawing 6 is A partial schematic diagrams in accompanying drawing 5；
Accompanying drawing 7 isolates the structural representation of step b in the construction method of wall construction for the compound underground anti-seepage of the present invention；
Accompanying drawing 8 isolates the structural representation of step c in the construction method of wall construction for the compound underground anti-seepage of the present invention；
Accompanying drawing 9 isolates the structural representation of step d in the construction method of wall construction for the compound underground anti-seepage of the present invention.
In figure marked as：
10th, divider wall；
20th, wall；21st, functional layer；22nd, film material；23rd, slurry coat method；24th, materials for wall；25th, variable weights.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
Referring to the drawings 4, the compound underground anti-seepage isolation wall construction in the present embodiment, it include vertically arranged wall 1,
At least two one functional layers 2 being arranged in wall 1, the setting direction of functional layer 2 is parallel with wall 1, and at least one layer of functional layer 2 is
It is membranaceous.Use material different per one functional layer 2.Arrow represents contaminant infiltration direction in accompanying drawing 4.
In a kind of highly preferred embodiment, all functional layers 2 can be all using film material, also can be existing
Film material, there is board-like material again.
The material that membranaceous functional layer 2 uses can be butyl rubber (IIR-Butyl rubber) coiled material, chlorinated polyethylene
Alkene rubber (CPE-Chlorinated polyethylene) coiled material, chlorosulfonated polyethylene (CSM-Chlorosulfonated
Polyethylene) rubber, ethylene propylene diene rubber (EPDM-Ethylene propylene diene monomer) coiled material, chlorine
Buna (CR-Polychloroprene) coiled material, polyethylene (PE-Polyethylene) geomembrane, high density polyethylene (HDPE)
(HDPE-High Density Polyethylene) geomembrane or polyvinyl chloride (PVC-Polyvinyl chloride) geotechnique
Film.
The material that the functional layer 2 of tabular uses includes polyethylene (PE-Polyethylene) plate, high density polyethylene (HDPE)
(HDPE-High Density Polyethylene) plate, ultra-high molecular weight polyethylene (UHMWPE-Ultra High
Molecular Weight Polyethylene) plate or polyvinyl chloride (PVC-Polyvinyl chloride) plate.
In a kind of highly preferred embodiment, functional layer 2 also uses new isolation sorbing material, including polypropylene
Nitrile carbon based fibers film, electro spinning nanometer fiber membrane, fluorubber, silicon rubber, fluorosioloxane rubber, mesoporous carbon/silica composite wood, concave convex rod
Stone/active carbon nanometer composite material or the compound high hydroscopic resin of acrylamide.
In above-mentioned new isolation sorbing material：1st, for the pollution of microorganism, polyacrylonitrile carbon based fibers film for
The compatibility of microorganism possesses compared with traditional material for microorganism clear superiority, there is very big adsorption capacity to bacterium；
2nd, for oil pollution, fluorubber, silicon rubber and fluorosioloxane rubber all have good barrier and corrosion resistance under high/low temperature；
3rd, there is good adsorption capacity for PAH (PAHs) for organic contamination, electro spinning nanometer fiber membrane；Mesoporous carbon/silica is multiple
Material is closed due to the advantages of it has had activated carbon and mesoporous material concurrently, good absorption macromolecular organic pollution can have been reached
Effect；4 attapulgites/active carbon nanometer composite material has very big adsorption capacity (up to 346mg/g) to methylene blue, concavo-convex
Rod stone/active carbon nanometer composite material is using attapulgite as template, and cellulose is carbon source, and zinc chloride is activator, certain
Calcination condition under, be prepared by the method for a step carbonization-activation；4th, for heavy metal pollution, the compound height of acrylamide
Water-absorbing resin is in Cu2+Adsorbance of initial concentration when being 1000mg/L be 299mg/g, the compound high hydroscopic resin of acrylamide
High water holding capacity is kept at high temperature under high pressure, is a kind of organic adsorption material developed rapidly, and heavy metal has very strong
Adsorption capacity.
In a kind of highly preferred embodiment, the distance between adjacent two layers functional layer 2 is not less than 150mm.
In a kind of highly preferred embodiment, wall uses cement-bentonite or soil-bentonite.
This compound low antiseepage isolation wall construction, can repair the combined pollutant concrete condition in place according to target,
Suitable isolation sorbing material is selected as functional layer.Wall body structure is spaced compound of multiple function layers and materials for wall
Structure.Materials for wall provides intensity for antiseepage wall construction and plays a part of antiseepage to a certain extent, compound impervious wall for
The antiseepage obstructing capacity of pollutant is mainly provided by functional layer, and functional layer is determined according to the species of pollutant in the percolate of place
Material is formed, and the number of plies of functional layer is determined according to the compound quantity of pollutant classification.This composite construction provides for cut-pff wall
" multiple security ", avoid leaching of the pollutant in underground environment.
The present embodiment additionally provides a kind of construction method based on above-mentioned compound underground anti-seepage isolation wall construction, including
Following steps：
A. the position of antiseepage divider wall need to set to excavate grooving, slurry coat method 23 is being injected in groove, by the membranaceous material of functional layer
Material 22 is laid along the line of rabbet joint, and adjacent two panels film material 22 is spliced, in the lower suspension variable weights 25 of film material 22, such as
Shown in accompanying drawing 5, arrow represents the sinking direction of film material in figure；
B. film material 22 is slowly sunk into slurry coat method 23, the flatness and perpendicularity of film is kept during sinking to, such as
Shown in accompanying drawing 7, arrow represents the sinking direction of film material in figure；
C. film material 22 is sunk into designed elevation, as shown in Figure 8；
D. injection wall body material 24 discharges slurry coat method 23 in groove, as shown in Figure 9.
In a kind of highly preferred embodiment, in step a, excavation grooving is carried out by groover.
In a kind of highly preferred embodiment, in step a, by bonding method or hot weld connection come to adjacent two panels film
Shape material 22 is spliced, as shown in Figure 6.
In a kind of highly preferred embodiment, in step d, materials for wall 24 be cement bentonite hardening slurry or
Soil-bentonite compound.Materials for wall is gradually injected from the bottom of groove, because the used density of materials for wall 24 is more than shield
Wall mud 23, with the injection of materials for wall 24, slurry coat method 23 is gradually discharged from top.
Consider the applicability for variety classes mixed pollutants, the isolation sorbing material of the invention by various trait
Isolated wall is handled by corresponding construction technology, forms spaced new multiple of multiple function layers and materials for wall
Mould assembly wall body structure, this compound underground anti-seepage divider wall have advantages below：1. according to the contaminated site of required processing
Specific combined pollutant type, purposive selection reasonably isolate sorbing material as functional layer, and it is total to materials for wall
The leaching of combined pollutant can be prevented to greatest extent with formed compound underground impervious wall is constructed；2. cut-off wall material
Material forms protection to isolation adsorption function layer, prevents functional layer from being damaged by sharp objects in place are repaired, ensure that antiseepage
The service life of divider wall；3. new construction method forms compound for the isolation sorbing material of various trait with materials for wall
Underground impervious wall provides feasibility.
Experimental verification：
Because the change of urban planning is with greater need for factory site resettlement is carried out, sheet has been left in genuine location for certain plant area of Chemical Co., Ltd.
Contaminated site, pollutant is mainly oil pollution and heavy metal pollution in place, and it is thick that four layers of nearly 18m are distributed with the base of original place
Silty clay, impermeable stratum are located underground about at 21m.Compound underground anti-seepage divider wall uses the composite junction of two one functional layers 2
Structure, (side of the close contaminated area of divider wall is interior, and the side away from contaminated area is outer) is respectively fluorine to functional layer 2 from the inside to the outside
Rubber coiled material and polyvinyl chloride (PVC) plate, wall 1 are cement bentonite, and isolation wall thickness is 600mm, and wall end stretch enters waterproof
Layer 500mm, between functional layer 2 and the side of wall 1, the distance between two one functional layers 2 be 200mm.
Project measures wall saturation permeability coefficient 1 × 10 after being completed-11M/s or so, in the underground water outside antiseepage divider wall
Pollutant is not detected, by the use of nearly 5 years, the infiltration coefficient not significant change of vertical divider wall, for pollutant
Absorption iris action is still good, and monitored quality of groundwater is normal during use, demonstrates the validity and reliability of scheme.
Described above is only the preferred embodiment of the present invention, is not intended to limit the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is some improvement and
Modification, these improvement and modification also should be regarded as protection scope of the present invention.
Claims (9)
- A kind of 1. compound underground anti-seepage isolation wall construction, it is characterised in that：It include vertically arranged wall, be arranged on it is described Every layer in wall uses different at least two one functional layers of material, and setting direction and the wall of the functional layer are put down OK, the functional layer described at least one layer is membranaceous.
- 2. compound underground anti-seepage isolation wall construction according to claim 1, it is characterised in that：What the functional layer used Material includes butyl rubber coiled material, Polyvinyl chloride rubber roofing material, CSM, EPDM rubber rolling material, chlorine Buna coiled material, polyethylene film for earthwork, high-density polyethylene geomembrane or polyvinyl chloride geomembrane.
- 3. compound underground anti-seepage isolation wall construction according to claim 1, it is characterised in that：What the functional layer used Material includes polyacrylonitrile carbon based fibers film, electro spinning nanometer fiber membrane, fluorubber, silicon rubber, fluorosioloxane rubber, mesoporous carbon/oxidation Silicon composite wood, attapulgite/active carbon nanometer composite material or the compound high hydroscopic resin of acrylamide.
- 4. compound underground anti-seepage isolation wall construction according to claim 1, it is characterised in that：Function described in adjacent two layers The distance between layer is not less than 150mm.
- 5. compound underground anti-seepage isolation wall construction according to claim 1, it is characterised in that：Described wall uses water Mud-bentonite or soil-bentonite.
- 6. a kind of construction method of the compound underground anti-seepage isolation wall construction based on any one of claim 1-5, bag Include following steps：A. the position of antiseepage divider wall need to set to excavate grooving, injection slurry coat method in groove, by functional layer film material along groove Line is laid, and film material described in adjacent two panels is spliced, in the lower suspension variable weights of the film material；B. the film material is slowly sunk into slurry coat method, the flatness and perpendicularity of film is kept during sinking to；C. the film material is sunk into designed elevation；D. injection wall body material discharges the slurry coat method in the groove.
- 7. the construction method of compound underground anti-seepage isolation wall construction according to claim 6, it is characterised in that：Described In step a, excavation grooving is carried out by groover.
- 8. the construction method of compound underground anti-seepage isolation wall construction according to claim 6, it is characterised in that：Described In step a, adjacent two panels film material is spliced by bonding method or hot weld connection.
- 9. the construction method of compound underground anti-seepage isolation wall construction according to claim 6, it is characterised in that：Described In step d, the materials for wall is cement bentonite hardening slurry or soil-bentonite compound.
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| CN201710941627.0A CN107700509A (en) | 2017-10-11 | 2017-10-11 | Compound underground anti-seepage isolation wall construction and construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826215A (en) * | 2018-12-20 | 2019-05-31 | 国家能源投资集团有限责任公司 | Antiseepage membrane module, the construction method of underground waterproof curtain and underground waterproof curtain |
| WO2022047643A1 (en) * | 2020-09-02 | 2022-03-10 | 四川轻化工大学 | Environmentally-friendly composite bypass seepage-prevention flexible vertical isolation system, and installation method |
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| CN103321256A (en) * | 2013-07-09 | 2013-09-25 | 中国瑞林工程技术有限公司 | Anti-pollution three-dimensional composite seepage-proofing barrier system |
| CN104499510A (en) * | 2014-12-16 | 2015-04-08 | 北京高能时代环境技术股份有限公司 | Anti-seepage composite barrier |
| CN106320385A (en) * | 2016-10-17 | 2017-01-11 | 天津中联格林科技发展有限公司 | Vertical anti-seepage barrier and construction method thereof |
| CN106677226A (en) * | 2016-11-21 | 2017-05-17 | 北京高能时代环境技术股份有限公司 | Flexible barrier having restoration and vertical obstruction functions and preparation and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321256A (en) * | 2013-07-09 | 2013-09-25 | 中国瑞林工程技术有限公司 | Anti-pollution three-dimensional composite seepage-proofing barrier system |
| CN104499510A (en) * | 2014-12-16 | 2015-04-08 | 北京高能时代环境技术股份有限公司 | Anti-seepage composite barrier |
| CN106320385A (en) * | 2016-10-17 | 2017-01-11 | 天津中联格林科技发展有限公司 | Vertical anti-seepage barrier and construction method thereof |
| CN106677226A (en) * | 2016-11-21 | 2017-05-17 | 北京高能时代环境技术股份有限公司 | Flexible barrier having restoration and vertical obstruction functions and preparation and application thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826215A (en) * | 2018-12-20 | 2019-05-31 | 国家能源投资集团有限责任公司 | Antiseepage membrane module, the construction method of underground waterproof curtain and underground waterproof curtain |
| WO2022047643A1 (en) * | 2020-09-02 | 2022-03-10 | 四川轻化工大学 | Environmentally-friendly composite bypass seepage-prevention flexible vertical isolation system, and installation method |
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