CN108951675A - HDPE geomembrane and bentonite-clay complex vertical cut-pff wall and its construction method of installation - Google Patents
HDPE geomembrane and bentonite-clay complex vertical cut-pff wall and its construction method of installation Download PDFInfo
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- CN108951675A CN108951675A CN201710348618.0A CN201710348618A CN108951675A CN 108951675 A CN108951675 A CN 108951675A CN 201710348618 A CN201710348618 A CN 201710348618A CN 108951675 A CN108951675 A CN 108951675A
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- bentonite
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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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/001—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing unburned clay
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
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- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a kind of HDPE geomembrane-bentonite complex vertical cut-pff wall and its construction methods of installation, the vertical impermeable wall is arranged on the relative water resisting layer of underground, the vertical impermeable wall is made of HDPE geomembrane and bentonite-clay lenses, and according to the following steps, engineering geology and Hydrogeologic Survey are carried out to contaminated area and prevention and cure of pollution place；Smooth location；It is inserted perpendicularly into and is laid with HDPE geomembrane；Interruption supplement bentonite-clay mortar；It forms and leads wall and lead the cipollettic dam that wall platform is linked together；Pass through the technical program, have many advantages, such as that installation is simple, low in cost, do not destroy impervious barrier structure, pollution in situ remediation, it is available locally in work progress, on the basis of meeting original antiseepage requirement, the security and stability that geomembrane anti-seepage layer can be increased avoids geomembrane destruction caused by by external environment disturbance or due to the backwater effect of bottom.
Description
Technical field
The present invention relates to a kind of underground anti-seepage technologies, anti-more particularly to a kind of HDPE geomembrane-bentonite complex vertical
Seep wall and its construction method of installation.
Background technique
In petrochemical plant, filling station, household refuse landfill sites, Industrial Solid Waste landfill yard, danger wastes landfill
All there is earth's surface hidden leakage defect or have already appeared leakage problems in the place such as field, and seriously polluted periphery underground water and soil, shadow
The living environment and life safety of people are rung.
With environmental protection consciousness enhancing and environmental regulation it is more stringent, people especially pollute underground anti-seepage
The underground anti-seepage research of place is more and more, many industrial workings, the filling station, Industrial Solid Waste heap that domestic early stage builds
Field, Tailings Dam and household refuse landfill sites, these old plant areas, landfill area are mostly directly to topple over, and it is anti-not do any earth's surface
It seeps treatment measures or earth's surface Anti-seeping technology standard cannot be met environmental requirements or impervious element has been destroyed, pollutant is straight
Connect to surrounding and spread, thus contaminated soil and underground water, for contamination control, vertical seepage control be underground anti-seepage engineering very
Important one aspect.
For danger wastes landfill yard, if addressing is unsatisfactory for associated contamination control standard requirements, corresponding engineering hand
Section is also that vertical seepage control is done in selection, and it is vertical that existing underground vertical seepage control technique can be divided into rigid vertical seepage control technique, plasticity
Seepage control technique and flexible vertical seepage control technique；Rigid seepage control technique has both mainly by materials such as cement as main impervious material
Structure load-bearing and antiseepage effect, as seepage control technique, there are distinct disadvantages for rigid antiseepage, such as elasticity modulus height, non-deformability
Less than 1%, be also easy to produce stress concentration there is crack, connect with elasticity modulus lesser soil layer it is extremely difficult, it is easy to form leak it is hidden
Affected part position, and cement corrosion resistance ability is poor, easily contaminated object corrosion failure, while rigid cut-pff wall removes difficulty pole
Greatly, the disadvantages of subsequent development & construction is influenced；Plasticity seepage control technique be improved according to the shortcomings that rigid seepage control technique it is anti-
Infiltration wall technology, the low-intensity formed with part of cement in the rigid cut-pff wall of the admixtures such as bentonite, clay substitution, low bullet
Property modulus, low-permeability cut-pff wall material, but it only improves deficiency of rigid cut-pff wall, can not be fully solved resistance
The disadvantages of shape ability is poor, is easy to produce pre-existing fracture when constructing, and corrosion resistance is general.
Summary of the invention
In view of this, the main purpose of the present invention is to provide a kind of HDPE geomembrane-bentonite complex vertical cut-pff walls
And its construction method of installation is applied on environment-friendly engineering by the technical program, have barrier performance strong, corrosion resistance and good,
Durability is good, non-deformability is strong and has multiple seepage prevention system collective effect, construction site can spies such as development & construction again
Point, while bentonite-clay mortar has very strong adsorption capacity, polluter can be adsorbed, to effectively compensate for
Deficiency present in existing single vertical seepage control technology.
In order to achieve the above object, the technical scheme of the present invention is realized as follows:
The opposite of underground is arranged in a kind of HDPE geomembrane and bentonite-clay complex vertical cut-pff wall, the vertical impermeable wall
On water barrier, the vertical impermeable wall is made of HDPE geomembrane and bentonite-clay lenses, and the HDPE geomembrane is vertical
It is arranged in bentonite-clay lenses.
The HDPE geomembrane is 3.0mm thick, the infiltration coefficient < 1 × 10 of HDPE geomembrane-12Cm/s, the bentonite-
Clay lenses with a thickness of 300-600mm, the bentonite-clay lenses infiltration coefficient < 1 × 10-7cm/s。
Positioned at bentonite-clay lenses top two sides be provided with and lead wall, be provided on leading wall above it is viscous with bentonite-
What native impervious barrier flushed leads wall platform, is provided in being coated on HDPE geomembrane upper end on leading wall platform, and formed with
It leads wall and leads the cipollettic dam that wall platform is linked together.
A kind of HDPE geomembrane and bentonite-clay complex vertical cut-pff wall construction method of installation, sequentially include the following steps:
(a) engineering geology and Hydrogeologic Survey are carried out to contaminated area and prevention and cure of pollution place, measure groundwater level and water quality,
Relative water resisting layer lithology, infiltration coefficient, depth and thickness, water-bearing layer lithology and property, contamination range determine vertical seepage control
The cutting depth and thickness of wall；
(b) smooth location prepares bentonite-clay mortar, and in pollution antiseepage region, unpolluted area periphery excavates groove
And it will be in prepared bentonite-clay mortar injection respective grooves；
(c) it is inserted perpendicularly into bentonite-clay mortar in the groove and is laid with HDPE geomembrane；
(d) after moisture content exudation or evaporation are reduced in bentonite-clay mortar, interruption supplement bentonite-clay mortar to groove
In；
(e) after moistening soil-clay mortar and expiring groove solidification, bentonite-clay lenses is formed, is returned on leading wall platform with clay
It fills out in being coated on HDPE geomembrane upper end, and is formed and lead wall and lead the cipollettic dam that wall platform is linked together.
Bentonite-the clay mortar be can self-solidifying mud, and by following Ingredient Wt part constitute: bentonite 8-12,
Cohesive soil 50-70, water 20-30, additive 8-10.
The additive is polycarboxylic acids PVA, acrylates, lignosulfonates.
Beneficial effect after by adopting the above technical scheme is: a kind of HDPE geomembrane and bentonite-clay complex vertical are anti-
Seep wall and its construction method of installation, by the technical program, have install it is simple, low in cost, do not destroy impervious barrier structure, dirt
The advantages that contaminating in situ remediation is available locally in work progress, on the basis of meeting original antiseepage requirement, can increase geotechnique
The security and stability of film impervious barrier avoids geomembrane destruction caused by by external environment disturbance or due to the backwater effect of bottom.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is HDPE geomembrane-bentonite-clay vertical impermeable wall structural schematic diagram in the present invention.
In figure, 1 relative water resisting layer, 2 HDPE geomembranes, 3 bentonites-clay lenses, 4 lead wall, 5 lead wall platform, 6 ladder
Shape dam, 7 soil layers or rock stratum, 8 contaminated areas.
Specific embodiment
The specific embodiment in the present invention is described in further detail below in conjunction with attached drawing.
As depicted in figs. 1 and 2, HDPE geomembrane and bentonite of the present invention-clay complex vertical cut-pff wall, it is described
Vertical impermeable wall is arranged on the relative water resisting layer 1 of underground, and the vertical impermeable wall is by HDPE geomembrane 2 and bentonite-clay
Impervious barrier 3 is constituted, and the HDPE geomembrane 2 is vertically set in bentonite-clay lenses 3.
The HDPE geomembrane 2 is 3.0mm thick, the infiltration coefficient < 1 × 10 of HDPE geomembrane 2-12Cm/s, the swelling
Soil-clay lenses 3 with a thickness of 300-600mm., the 3 infiltration coefficient < 1 × 10 of bentonite-clay lenses-7cm/
s。
Be provided with positioned at 3 top two sides of bentonite-clay lenses and lead wall 4, be provided on leading wall 4 above and swelling
What soil-clay lenses 3 flushed leads wall platform 5, is provided in being coated on 2 upper end of HDPE geomembrane on leading wall platform 5, and
And it is formed and leads wall 4 and lead the cipollettic dam 6 that wall platform 5 is linked together.
HDPE geomembrane and bentonite of the present invention-clay complex vertical cut-pff wall construction method of installation, by following
Step carries out:
(a) engineering geology and Hydrogeologic Survey are carried out to contaminated area 8 and prevention and cure of pollution place, measures groundwater level and water
Matter, relative water resisting layer 1, infiltration coefficient, depth and thickness, water-bearing layer lithology and property, contamination range determine vertical seepage control
Position, cutting depth and the thickness of wall；
(b) smooth location prepares bentonite-clay mortar, and in pollution antiseepage region, unpolluted area periphery excavates groove
And it will be in prepared bentonite-clay mortar injection respective grooves；
(c) it is inserted perpendicularly into bentonite-clay mortar in the groove and is laid with HDPE geomembrane 2；
(d) after moisture content exudation or evaporation are reduced in bentonite-clay mortar, interruption supplement bentonite-clay mortar to groove
In；
(e) after moistening soil-clay mortar and expiring groove solidification, bentonite-clay lenses 3 is formed, uses clay on leading wall platform 5
In 2 upper end of HDPE geomembrane is coated on by backfill, and is formed and lead wall 4 and lead the cipollettic dam 6 that wall platform 5 is linked together.
Bentonite-the clay mortar be can self-solidifying mud, and by following Ingredient Wt part constitute: bentonite 8-12,
Cohesive soil 50-70, water 20-30, additive 8-10.
The additive is polycarboxylic acids PVA, acrylates, lignosulfonates.
Sodium bentonite and cohesive soil, and the infiltration coefficient < 1 × 10 of HDPE geomembrane 2 are used in the present invention-12Cm/s,
Its excellent barrier performance makes the barrier performance of entire vertical seepage control wall construction reach Environmental Design requirement, bentonite-clay
The cut-pff wall that impervious barrier 3 and HDPE geomembrane 2 are constituted belongs to flexible wall, and outstanding feature is elasticity modulus and surrounding soil phase
Seemingly, it is easy to construct, low cost, construction site can development & construction again.
It, can also be using the fixed HDPE geomembrane 2 of anchoring groove, by the upper end of HDPE geomembrane 2 in the embodiment of the present invention
Extend, distance, which is excavated to dig on the ground groove >=1m, anchoring groove, is backfilled with cohesive soil or sandy soil, and anchoring groove can allow
Later use HDPE geomembrane 3 is more convenient, and band steel can additionally be selected to be fixed to the modes such as lead on wall 4.
In the embodiment of the present invention, when 2 area of HDPE geomembrane is excessive, operation difficulty can be very big, therefore generally using 4m's
Breadth carries out the decentralization of HDPE geomembrane 2, and two HDPE geomembranes 2 are connected using lock connection, latches junction in order to prevent
Leakage, can use sealing rod and bentonite-clay mortar composite anti-penetrating.
In the present invention, bentonite-clay lenses 3 and HDPE geomembrane 2 constitute vertical impermeable wall, vertical impermeable wall two
Side is soil layer or rock stratum 7, and vertical impermeable wall must be deep into 1 or less 1.0 ~ 1.5m of relative water resisting layer, backfills bentonite-clay mortar
After can prevent pollutant from cut-pff wall bottom leaky, leading wall 4 is builds along cut-pff wall metope upper end two sides with sufficiently strong
Degree, rigidity and precision play the role of earth-retaining, guiding, supporting heavy, save mud and the twice of measuring basis are parallel to cut-pff wall
The works of central axis, above it overlay lead wall platform 5 and bentonite-clay lenses 3 are encapsulated in interior, HDPE geomembrane
2 upper ends are stretched out from leading in wall platform 5, are led and cipollettic dam 6 are arranged on wall platform 5 HDPE geomembrane 2 is encapsulated in cipollettic dam 6.
The above, preferable possible embodiments only of the invention, the protection scope being not intended to limit the invention.
Claims (6)
1. the phase of underground is arranged in a kind of HDPE geomembrane and bentonite-clay complex vertical cut-pff wall, the vertical impermeable wall
To on water barrier, which is characterized in that the vertical impermeable wall is made of HDPE geomembrane and bentonite-clay lenses, described
HDPE geomembrane is vertically set in bentonite-clay lenses.
2. HDPE geomembrane according to claim 1 and bentonite-clay complex vertical cut-pff wall, which is characterized in that institute
Stating HDPE geomembrane is 3.0mm thick, the infiltration coefficient < 1 × 10 of HDPE geomembrane-12Cm/s, the bentonite-clay lenses
With a thickness of 300-600mm., the bentonite-clay lenses infiltration coefficient < 1 × 10-7cm/s。
3. HDPE geomembrane according to claim 1 and bentonite-clay complex vertical cut-pff wall, which is characterized in that position
It is neat with bentonite-clay lenses above bentonite-clay lenses top two sides are provided with and lead wall, are provided on leading wall
Flat leads wall platform, is provided in being coated on HDPE geomembrane upper end on leading wall platform, and is formed and lead wall and lead wall
The cipollettic dam that platform is linked together.
4. a kind of HDPE geomembrane and bentonite-clay complex vertical cut-pff wall construction method of installation, which is characterized in that by following
Step carries out:
(a) engineering geology and Hydrogeologic Survey are carried out to contaminated area and prevention and cure of pollution place, measure groundwater level and water quality,
Relative water resisting layer lithology, infiltration coefficient, depth and thickness, water-bearing layer lithology and property, contamination range determine vertical seepage control
Position, cutting depth and the thickness of wall；
(b) smooth location prepares bentonite-clay mortar, and in pollution antiseepage region, unpolluted area periphery excavates groove
And it will be in prepared bentonite-clay mortar injection respective grooves；
(c) it is inserted perpendicularly into bentonite-clay mortar in the groove and is laid with HDPE geomembrane；
(d) after moisture content exudation or evaporation are reduced in bentonite-clay mortar, interruption supplement bentonite-clay mortar to groove
In；
(e) after moistening soil-clay mortar and expiring groove solidification, bentonite-clay lenses is formed, is returned on leading wall platform with clay
It fills out in being coated on HDPE geomembrane upper end, and is formed and lead wall and lead the cipollettic dam that wall platform is linked together.
5. HDPE geomembrane according to claim 4 and bentonite-clay complex vertical cut-pff wall construction method of installation,
Be characterized in that, the bentonite-clay mortar be can self-solidifying mud, and by following Ingredient Wt part constitute: bentonite 8-12,
Cohesive soil 50-70, water 20-30, additive 8-10.
6. HDPE geomembrane according to claim 5 and bentonite-clay complex vertical cut-pff wall construction method of installation,
It is characterized in that, the additive is polycarboxylic acids PVA, acrylates, lignosulfonates.
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| CN201710348618.0A CN108951675A (en) | 2017-05-17 | 2017-05-17 | HDPE geomembrane and bentonite-clay complex vertical cut-pff wall and its construction method of installation |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110984238A (en) * | 2019-10-28 | 2020-04-10 | 上海市政工程设计研究总院（集团）有限公司 | HDPE (high-density polyethylene) film-bentonite composite vertical anti-seepage wall system and construction equipment and construction method thereof |
| CN111074920A (en) * | 2020-01-16 | 2020-04-28 | 周同和 | Construction method for inserting anti-seepage blanket into cement-soil continuous wall to form composite curtain and composite curtain prepared by construction method |
| CN111441375A (en) * | 2020-05-08 | 2020-07-24 | 天津建昌环保股份有限公司 | Flexible continuous wall for underground pollution blocking and construction method thereof |
| CN113062296A (en) * | 2021-04-02 | 2021-07-02 | 交通运输部天津水运工程科学研究所 | Vacuum preloading boundary sealing method |
| CN113338349A (en) * | 2021-06-09 | 2021-09-03 | 中冶节能环保有限责任公司 | Novel steel slag landfill vertical separation system and implementation method |
| CN113914374A (en) * | 2021-09-30 | 2022-01-11 | 中节能大地（杭州）环境修复有限公司 | Construction method of flexible barrier wall of refuse landfill suitable for high water level condition |
| CN114130784A (en) * | 2021-11-08 | 2022-03-04 | 中煤科工集团西安研究院有限公司 | Waste packaging device and method |
| CN114525818A (en) * | 2022-02-11 | 2022-05-24 | 中钢集团马鞍山矿山研究总院股份有限公司 | Construction method of combined anti-seepage body with horizontal anti-seepage function and vertical anti-seepage function |
| CN115233717A (en) * | 2022-07-27 | 2022-10-25 | 中国矿业大学(北京) | Vertical and horizontal combined tailing pond stable structure and construction method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110984238A (en) * | 2019-10-28 | 2020-04-10 | 上海市政工程设计研究总院（集团）有限公司 | HDPE (high-density polyethylene) film-bentonite composite vertical anti-seepage wall system and construction equipment and construction method thereof |
| CN111074920A (en) * | 2020-01-16 | 2020-04-28 | 周同和 | Construction method for inserting anti-seepage blanket into cement-soil continuous wall to form composite curtain and composite curtain prepared by construction method |
| CN111441375A (en) * | 2020-05-08 | 2020-07-24 | 天津建昌环保股份有限公司 | Flexible continuous wall for underground pollution blocking and construction method thereof |
| CN113062296A (en) * | 2021-04-02 | 2021-07-02 | 交通运输部天津水运工程科学研究所 | Vacuum preloading boundary sealing method |
| CN113338349A (en) * | 2021-06-09 | 2021-09-03 | 中冶节能环保有限责任公司 | Novel steel slag landfill vertical separation system and implementation method |
| CN113914374A (en) * | 2021-09-30 | 2022-01-11 | 中节能大地（杭州）环境修复有限公司 | Construction method of flexible barrier wall of refuse landfill suitable for high water level condition |
| CN114130784A (en) * | 2021-11-08 | 2022-03-04 | 中煤科工集团西安研究院有限公司 | Waste packaging device and method |
| CN114130784B (en) * | 2021-11-08 | 2022-12-13 | 中煤科工集团西安研究院有限公司 | Waste packaging device and method |
| CN114525818A (en) * | 2022-02-11 | 2022-05-24 | 中钢集团马鞍山矿山研究总院股份有限公司 | Construction method of combined anti-seepage body with horizontal anti-seepage function and vertical anti-seepage function |
| CN114525818B (en) * | 2022-02-11 | 2023-07-28 | 中钢集团马鞍山矿山研究总院股份有限公司 | Construction method of combined impermeable body with horizontal impermeable and vertical impermeable functions |
| CN115233717A (en) * | 2022-07-27 | 2022-10-25 | 中国矿业大学(北京) | Vertical and horizontal combined tailing pond stable structure and construction method |
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Application publication date: 20181207 |
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| RJ01 | Rejection of invention patent application after publication |