CN205604306U - Perpendicular cut -pff wall of GCL - Google Patents
Perpendicular cut -pff wall of GCL Download PDFInfo
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- CN205604306U CN205604306U CN201620271836.XU CN201620271836U CN205604306U CN 205604306 U CN205604306 U CN 205604306U CN 201620271836 U CN201620271836 U CN 201620271836U CN 205604306 U CN205604306 U CN 205604306U
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Abstract
The utility model discloses a perpendicular cut -pff wall of GCL, wherein perpendicular cut -pff wall of GCL includes perpendicular cut -pff wall body, the perpendicular cut -pff wall body outside be fixed with the waterproof blanket of sodium bentonite, the waterproof blanket of sodium bentonite include that perpendicular seepage prevention structure and top fixed knot construct. The utility model discloses a cut -pff wall osmotic coefficient is low, combines with the soil body, and the prevention of seepage is effectual.
Description
Technical field
This utility model relates to antiseepage field, is specifically related to a kind of GCL vertical impermeable wall.
Background technology
There is hidden leakage defect in dykes and dams, soot etc., drastically influence safety and the existence ring of people
Border, along with the enhancing of environmental protection consciousness, people grind the antiseepage in antiseepage especially soot
Studying carefully more and more, domestic early stage has built many easy refuse landfills, these old rubbish
Landfill yard is mostly directly toppled at low-lying land, does not do any Anti-seeping technology, pollutant directly to
Diffusion around, thus contaminated soil and subsoil water.For antiseepage, level of the most mainly doing is prevented
Ooze, but vertical seepage control is also a critically important aspect of seepage control project.
Meanwhile, at the danger waste landfill site that environmental protection is higher ranked, on the basis of doing horizontal leakage preventing,
It is also required to do vertical seepage control.Existing vertical impermeable wall can be divided into rigidity cut-pff wall, plasticity anti-
Ooze wall and flexible barrier wall.Rigidity cut-pff wall has load-bearing and antiseepage effect concurrently, if but only utilized
Its barrier characteristics, there is distinct disadvantage in rigidity cut-pff wall, as elastic modelling quantity is high, is easily generated stress
There is crack in concentration, is connected extremely difficult with basic part, easily forms hidden leakage defect position,
Demolition of concrete antiseeping wall difficulty is very big, affects the shortcomings such as follow-up development & construction.Plasticity antiseepage
Wall is the cut-pff wall technology that the shortcoming according to rigidity cut-pff wall improves, and it is used bentonite, glues
Low-intensity that the admixtures such as soil replace part of cement in normal concrete and formed, low elasticity mould
The cut-pff wall material of amount, but it is improved the deficiency of rigidity cut-pff wall, can not solve completely
Certainly problem above.The current more application of flexible barrier wall in hydraulic engineering, have construction simple,
Low, the construction site similar to surrounding soil of construction costs can the feature such as development & construction again, but
Its barrier performance is difficult to meet ＜ 1 × 10-7The environmental requirement of cm/s.Curtain cut-pff wall technology is
HDPE geomembrane vertical impermeable wall, it can arrive good anti-seepage effect, but its technical difficulty
Higher, construction costs is expensive, and HDPE geomembrane can not be completely combined with surrounding soil,
When cut-pff wall generation geology moves, geomembrane can be easily separated with surrounding soil, thus affects engineering
Quality.It is only to have buffer action that above cut-pff wall has shortcoming, even if infiltration coefficient can reach
To technology requirement, but have percolate and pass through, so that harmful substance Polluted Soil therein
Earth and subsoil water.
Utility model content
This utility model provides a kind of cut-pff wall, and overall barrier performance is good, and sodio therein is swollen
Profit soil waterproof blanket can be combined closely with the soil body of surrounding.
A kind of cut-pff wall, including vertical cut-pff wall body, described vertical cut-pff wall body
Outside is fixed with sodium-based bentonite waterproof carpet, and described sodium-based bentonite waterproof carpet includes vertical anti-
Ooze structure and top fixed structure.
Further, described sodium-based bentonite waterproof carpet is powder-type sodium-based bentonite waterproof carpet,
The grammes per square metre of described powder-type sodium-based bentonite waterproof carpet is 3800-4500g/m2。
Further, the infiltration coefficient ＜ 5 × 10 of described sodium-based bentonite waterproof carpet-9cm/s。
Further, described top fixed structure is on described sodium-based bentonite waterproof carpet top
Anchoring groove it is provided with outside portion.
Further, waterproof blanket is overlapped by the bar shaped GCL of a width of 4-8m and forms, overlapping regions weight
Closing partial width and be more than 50cm, overlapping regions is smeared overlap joint cream and is sealed, when lapping direction and construction
The flow direction of mud is consistent.
On the other hand, the preparation method of a kind of cut-pff wall, comprise the steps:
Excavation groove；Back side inwall at described groove lays sodium-based bentonite waterproof carpet,
Described sodium-based bentonite waterproof carpet top is fixed；Then to be equipped with sodium bentonite waterproof
In the groove of blanket perfusion can self-solidifying mud, treat mud to solidify i.e. and obtain described cut-pff wall.
Further, described top is fixing uses anchoring groove to fix.
Further, described sodium-based bentonite waterproof carpet is by two-layer geotextile layer and two-layer soil
Bentonite bed between work tissue layer is constituted, and the grammes per square metre of described sodium-based bentonite waterproof carpet is
3800-4500g/m2。
Further, described following component can be included in terms of mass fraction by self-solidifying mud: swelling
Soil 8-12%, silty clay 30-60%, additive 8-12%, water accounting 20-30%.
Compared with prior art, this utility model application at least has the advantages that
Adding sodium-based bentonite waterproof carpet layer in the cut-pff wall of this utility model application, sodio is swollen
Profit soil waterproof blanket not only can improve the barrier performance of cut-pff wall, and can be with the soil body of surrounding
Combine closely, engineering is played the effect of stable reinforcement.
Bentonite in sodium-based bentonite waterproof carpet layer and self-solidifying mud can be with active adsorption and isolation
Harmful substance, it is possible to the harmful substance being substantially reduced in percolate.
This utility model belongs to mud wall class flexible barrier wall, construction is simple, construction costs is low,
Good seepage-proof property, does not affect place subsequent development construction.
Accompanying drawing explanation
Fig. 1 be in this utility model GCL vertical impermeable wall embodiment with GCL vertical seepage control
The soot structural representation of wall.
Detailed description of the invention
Below in conjunction with concrete preferred embodiment the technical solution of the utility model done and explain further
State, it will be appreciated that preferred embodiment is intended merely to facilitate the understanding of this utility model scheme, no
Restriction as protection domain.
The preparation method of a kind of cut-pff wall, comprises the steps:
(1) excavation groove: be the groove of 70cm at soot periphery excavation width, groove hangs down
Nogata is upwards deep into below impermeable stratum 50cm, it is therefore an objective to forms overall seepage control system, prevents
Percolate oozes out from cut-pff wall lower end
(2) the back side inwall at described groove lays powder-type sodium-based bentonite waterproof carpet
(GCL) grammes per square metre of, described powder-type GCL is 3800g/m2；Described powder-type GCL by
Bentonite bed between two-layer geotextile layer and two-layer geotextile layer is constituted；
Need exist for explanation: it is fast, under relatively low grammes per square metre that powder-type GCL meets water-responsive speed
Excellent barrier performance can be reached, and low grammes per square metre is conducive to construction.Meanwhile, in antiseepage requirement
In the less strict engineering with limited budget, it is also possible to select granular pattern GCL, graininess GCL valency
Lattice relative moderate, stripping performance are good, but granular pattern GCL grammes per square metre >=4500g/m2Just can play good
Barrier performance, grammes per square metre is higher makes troubles to construction, and its to meet water-responsive speed relatively slow, water
Barrier performance after changing completely is also much smaller than powder-type GCL.
GCL both sides are non-woven fabrics and woven cloth, can well be combined with the soil body of surrounding.GCL
Structure is uniformly to be fixed with one layer of sodium bentonite between two-layer geotextile, and bentonite is met water and sent out
Raw expansion, the coefficient of expansion is up to 24ml/2g, the confined space that bentonite is formed in two-layer geotextiles
Interior expansion forms fine and close impervious barrier, thus reaches good anti-seepage effect.
Sodium bentonite forms high density diaphragm under water pressure condition, during thickness about 3mm, it
Water penetration be equivalent to the 30cm thickness clay of 100 times, have the strongest from water retention property.
(3) then in the groove being equipped with powder-type sodium-based bentonite waterproof carpet, perfusion can self-solidifying
Mud, treats mud to solidify i.e. and obtains described cut-pff wall；Wherein can include following component by self-solidifying mud:
Bentonite 10%, silty clay 50%, additive 10%, water accounting 30%.
Additive can use the additive that cement, flyash etc. are commonly used in the art；Various groups
The ratio divided can regulate as required, and range of accommodation is bentonite 8-12%, silty clay
30-60%, additive 8-12%, water accounting 20-30%.
Need exist for explanation: mud wall is mainly composed of sodium bentonite and silty clay,
And GCL infiltration coefficient ＜ 5 × 10-9Cm/s, the barrier performance of its excellence makes whole cut-pff wall system
System barrier performance reaches Environmental Design requirement, and mud wall belongs to flexible wall, and flexible barrier wall is current
More application is in hydraulic engineering, and its outstanding feature is that elastic modelling quantity is similar to surrounding soil, easy
Construct, cost is low, construction site can development & construction again.
As preferably, use anchoring groove to fix waterproof blanket, the upper end of waterproof blanket is extended, distance
Having dug anchoring groove on the ground of excavation groove >=1m, with concrete backfill, anchoring groove can be effective
Prevent waterproof blanket from gliding.Additionally can be in the mode such as select piling fixing.
Needing exist for explanation: when waterproof blanket area is excessive, operation easier can be very big, but
If narrower width there will be again the problem of splicing leakproof, in order to prevent stitching portion seepage, permissible
Use overlapping mode, it should be noted that overlapping regions intersection width should overlap at more than 50cm
Overlap joint cream is smeared in region, and lapping direction is consistent with the flow direction of mud during construction, the most permissible
The flowing effectively preventing mud causes the damage of overlapping regions.
In order to adapt to different construction demands, the component of mud wall can be adjusted as required,
The kind of additive can also be adjusted according to the needs of those skilled in the art.
The vertical impermeable wall infiltration coefficient ＜ 1 × 10 prepared by such scheme-7Cm/s, it is possible to meet
Environmental requirement, the advantage simultaneously having flexible barrier wall concurrently.
For improving the anti-seepage effect of cut-pff wall further, overlay film type GCL can be selected, i.e. waterproof
The outside of blanket increases a hdpe layer (HDPE) film, and HDPE film is to steam and air
Permeability little, water absorption is low；
Traditional rigidity cut-pff wall and plasticity cut-pff wall have the effect of load bearing wall, in part because of it
Can not substitute in engineering, this utility model can be according to characters of practical engineering, by scheme
Mud wall is replaced by plastic concrete wall, rigidity cut-pff wall etc., by GCL and rigidity cut-pff wall
It is used in combination with plasticity cut-pff wall, barrier performance can be improved equally, reduce risk of leakage.
Fig. 1 is a kind of soot structural representation with above-mentioned vertical impermeable wall, such as Fig. 1 institute
Showing, soot includes impermeable stratum 1, sanitary fill district 2, and mud wall 3, sodium bentonite are anti-
Water blanket 4, anchoring groove 5, horizontal impervious layer 6, wherein mud wall 3 and GCL4 constitutes vertical anti-
Oozing wall, vertical impermeable wall both sides are soil 7, and vertical impermeable wall is deep into impermeable stratum 50cm,
It is possible to prevent water from junction seepage；Anchoring groove 5 is filled with concrete, is possible to prevent waterproof
Blanket sagging, makes waterproof blanket keep vertical.
The not most part of this utility model application, those skilled in the art can select as required
Select, the thickness of such as body of wall, add suitable additive etc. to meet needs, belong to
Within the protection domain of the application scheme.
The above, detailed description of the invention the most of the present utility model, but guarantor of the present utility model
The scope of protecting is not limited thereto, and any those familiar with the art is at this utility model
In the technical scope disclosed, change can be readily occurred in or replace, all should contain at this utility model
Protection domain within.Therefore, protection domain of the present utility model should be with described claim
Protection domain is as the criterion.
Claims (5)
1. a GCL vertical impermeable wall, including vertical impermeable wall body, it is characterised in that institute
The vertical impermeable wall outer body stated is fixed with sodium-based bentonite waterproof carpet, described Na-bentonite
Soil waterproof blanket includes vertical seepage control structure and top fixed structure.
GCL vertical impermeable wall the most according to claim 1, it is characterised in that described
Sodium-based bentonite waterproof carpet is powder-type sodium-based bentonite waterproof carpet, and described powder-type sodio is swollen
The grammes per square metre of profit soil waterproof blanket is 3800-4500g/m2。
GCL vertical impermeable wall the most according to claim 1, it is characterised in that described
The infiltration coefficient ＜ 5 × 10 of sodium-based bentonite waterproof carpet-9cm/s。
GCL vertical impermeable wall the most according to claim 1, it is characterised in that described
Top fixed structure is that described sodium-based bentonite waterproof carpet top outer is provided with anchoring groove.
GCL vertical impermeable wall the most according to claim 1, it is characterised in that waterproof blanket
Being overlapped by the bar shaped GCL of a width of 4-8m and form, overlapping regions intersection width is more than 50cm,
Overlapping regions is smeared overlap joint cream and is sealed, and lapping direction is consistent with the flow direction of mud during construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620271836.XU CN205604306U (en) | 2016-03-31 | 2016-03-31 | Perpendicular cut -pff wall of GCL |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201620271836.XU CN205604306U (en) | 2016-03-31 | 2016-03-31 | Perpendicular cut -pff wall of GCL |
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| CN205604306U true CN205604306U (en) | 2016-09-28 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672365A (en) * | 2016-03-31 | 2016-06-15 | 天津中联格林科技发展有限公司 | GCL vertical anti-seepage wall and preparation method thereof |
| CN108755778A (en) * | 2018-05-25 | 2018-11-06 | 句容康泰膨润土有限公司 | A kind of sodium-based bentonite waterproof carpet and its construction method |
| CN109837928A (en) * | 2018-09-12 | 2019-06-04 | 中国环境科学研究院 | The application method of seepage proof curtain, guide seepage control system and seepage proof curtain |
| 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 |
-
2016
- 2016-03-31 CN CN201620271836.XU patent/CN205604306U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672365A (en) * | 2016-03-31 | 2016-06-15 | 天津中联格林科技发展有限公司 | GCL vertical anti-seepage wall and preparation method thereof |
| CN108755778A (en) * | 2018-05-25 | 2018-11-06 | 句容康泰膨润土有限公司 | A kind of sodium-based bentonite waterproof carpet and its construction method |
| CN109837928A (en) * | 2018-09-12 | 2019-06-04 | 中国环境科学研究院 | The application method of seepage proof curtain, guide seepage control system and seepage proof curtain |
| 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 |
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