CN209482263U - A kind of geomembrane core-wall and rigid cut-pff wall connection structure - Google Patents
A kind of geomembrane core-wall and rigid cut-pff wall connection structure Download PDFInfo
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- CN209482263U CN209482263U CN201822095896.2U CN201822095896U CN209482263U CN 209482263 U CN209482263 U CN 209482263U CN 201822095896 U CN201822095896 U CN 201822095896U CN 209482263 U CN209482263 U CN 209482263U
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Abstract
The utility model provides a kind of geomembrane core-wall and rigid cut-pff wall connection structure, including intact geomembrane and rigid cut-pff wall；The inner end positions of the intact geomembrane are fixed with phase gelling rock structure, and the inner end positions of rigid cut-pff wall are fixed with second phase gelling rock structure, and a phase is gelled rock structure by the grouting of I sequence grout hole, and second phase gelling rock structure is in the milk by II sequence grout hole；One phase was gelled rock structure as muti-piece, and every piece of radius is not less than 50cm；Second phase gelling rock structure is muti-piece, and every piece of radius is not less than 50cm.Mode, reasonable arrangement sequence of construction of the utility model by using controlled grouting are attached geomembrane and rigid cut-pff wall connecting portion, save engineering cost, concentrated leakage passage is completely enclosed, is removed a hidden danger.
Description
Technical field
The utility model relates to a kind of geomembrane core-wall and rigid cut-pff wall connection structure, belong to water conservancy, hydroelectric project
Earth and rockfill dam (cofferdam) reinforcement technical field.
Background technique
In recent years, in Medium & Small Earth Rock Dam and the earth rock cofferdam construction of the engineerings such as water conservancy, water power, geomembrane seepage prevention of core wall
Structure application is gradually extensive, and geomembrane core-wall when the case where a variety of causes leads to partial region impermeable failure, a large amount of leaks because having
Occur, jet grouted barrier wall generallyd use for continuous concentrative seepage region in blocks or concrete cut carries out closure processing,
Such cut-pff wall is rigid structure, cannot be directly connected to existing intact geomembrane core-wall.The prior art generallys use increase
The mode that the lap of splice extends seepage paths solves, and not only increases engineering cost, and cannot completely enclose concentrated leakage passage.
Utility model content
In order to solve the above technical problems, the utility model, which provides a kind of geomembrane core-wall, connect knot with rigid cut-pff wall
Structure, the geomembrane core-wall and rigid cut-pff wall connection structure are filled by joining position to geomembrane and rigid cut-pff wall using control
The mode of slurry is attached, and saves engineering cost, concentrated leakage passage is completely enclosed.
The utility model is achieved by the following technical programs.
A kind of geomembrane core-wall provided by the utility model and rigid cut-pff wall connection structure, including intact geomembrane and just
Property cut-pff wall；The inner end positions of the intact geomembrane are fixed with phase gelling rock structure, the inner end positions of rigid cut-pff wall
It is fixed with second phase gelling rock structure, a phase is gelled rock structure by the grouting of I sequence grout hole, and second phase gelling rock structure passes through
The grouting of II sequence grout hole；One phase was gelled rock structure as muti-piece, and every piece of radius is not less than 50cm；Second phase gelling rock structure is more
Block, every piece of radius are not less than 50cm.
The pitch of holes of the I sequence grout hole is not more than 1.2 times of the grouting radius of phase gelling rock structure.
The pitch of holes of the II sequence grout hole is not more than 1.2 times of the grouting radius of second phase gelling rock structure.
The anchorage length of the intact geomembrane is not less than 50cm.
The one phase gelling rock structure is in the milk by I sequence grout hole, and referring to will to the progress controlling grouting of I sequence grout hole
Dam body soil stone fills the cementing formation of material.
The second phase gelling rock structure is in the milk by II sequence grout hole, is referred to and is carried out controlling grouting to II sequence grout hole
Dam body soil stone is filled into the cementing formation of material.
The rigidity cut-pff wall and the second phase gelling rock structure lap of splice are not less than the thickness of rigid cut-pff wall.
Retain safe distance between the rigidity cut-pff wall and phase gelling rock structure.
The utility model has the beneficial effects that: by using the mode of controlled grouting, reasonable arrangement sequence of construction, to soil
Work film is attached with rigid cut-pff wall connecting portion, saves engineering cost, concentrated leakage passage is completely enclosed, and is eliminated hidden
Suffer from.
Detailed description of the invention
Fig. 1 is the planar structure schematic diagram of the utility model.
In figure: the intact geomembrane of 1-, 2- rigidity cut-pff wall, 3-I sequence grout hole, 4-II sequence grout hole, mono- phase of 5- are gelled soil
Stone structure, 6- second phase are gelled rock structure, and 7- dam body soil stone fills material, the anchorage length of the intact geomembrane of a-, and mono- phase of b- is gelled
Distance of the rock structure upstream and downstream lateral boundaries to geomembrane plane projection zone boundary, the plane projection width of c- geomembrane, d-
The pitch-row of grout hole, the thickness of e- rigidity cut-pff wall, f- rigidity cut-pff wall and the second phase gelling rock structure lap of splice, g-- are rigid
Property cut-pff wall and phase gelling rock structure between retain safe distance, r- controlling is in the milk dilation angle.
Specific embodiment
Be described further below the technical solution of the utility model, but claimed range be not limited to it is described.
A kind of geomembrane core-wall as shown in Figure 1 and rigid cut-pff wall connection structure, including intact geomembrane 1 and rigidity are prevented
Seep wall 2；The inner end positions of the intact geomembrane 1 are fixed with phase gelling rock structure 5, the inner end positions of rigid cut-pff wall 2
It is fixed with second phase gelling rock structure 6, phase gelling rock structure 5 passes through I sequence grout hole 3 and is in the milk, second phase gelling rock structure 6
It is in the milk by II sequence grout hole 4；One phase was gelled rock structure 5 as muti-piece, and every piece of radius is not less than 50cm；The native stone knot of second phase gelling
Structure 6 is muti-piece, and every piece of radius is not less than 50cm.
The pitch of holes of the I sequence grout hole 3 is not more than 1.2 times of the grouting radius of phase gelling rock structure 5.
The pitch of holes of the II sequence grout hole 4 is not more than 1.2 times of the grouting radius of second phase gelling rock structure 6.
The anchorage length of the intact geomembrane 1 is not less than 50cm.
The one phase gelling rock structure 5 is in the milk by I sequence grout hole 3, is referred to and is carried out controlling filling to I sequence grout hole 3
Dam body soil stone is filled 7 cementing formation of material by slurry.
The second phase gelling rock structure 6 is in the milk by II sequence grout hole 4, is referred to and is carried out controlling to II sequence grout hole 4
Dam body soil stone is filled 7 cementing formation of material by grouting.
The rigidity cut-pff wall 2 is not less than the thickness of rigid cut-pff wall 2 with second phase gelling 6 lap of splice of rock structure.
Retain safe distance between the rigidity cut-pff wall 2 and phase gelling rock structure 5.
It is specific:
It is in the milk to form phase gelling rock structure 5 by carrying out controlling to I sequence grout hole 3, fixes and protect connector portions
The intact geomembrane core-wall 1 of position；It is in the milk to form second phase gelling rock structure 6 by arranging the progress of grout hole 4 controlling to II, to rigid
Property cut-pff wall 2 and a phase gelling rock structure 5 carry out closing form rigid connection structure.
Native stone is filled 7 cementing shapes of material by carrying out controlling grouting to I sequence grout hole 3 by one phase gelling rock structure 5
At design strength and permeance property are required to be calculated according to boundary conditions such as water blocking heads and be determined；Dilation angle r is according to filling for grouting
Material property is determining by field test, typically no less than 50cm；The anchorage length a of intact geomembrane 1 is according to as defined in specification
Geomembrane anchorage length requires determination, typically no less than 50cm；One phase was gelled 5 upstream and downstream lateral boundaries of rock structure to geomembrane
The distance b of plane projection zone boundary is pressed to be determined not less than controlling grouting dilation angle r；It is complete before rigid cut-pff wall 2 is implemented
At and reach design strength 70% or more.
Native stone is filled 7 cementing shapes of material by carrying out controlling grouting to II sequence grout hole 4 by second phase gelling rock structure 6
At being gelled between rock structure 5 and rigid cut-pff wall 2 and be seamlessly connected a phase, design strength and permeance property are required according to gear
The boundary conditions such as water head, which calculate, to be determined；The dilation angle r that is in the milk is determining by field test according to filling material characteristic, generally not
Less than 50cm；70% or more complete before rigid cut-pff wall 2 is implemented and reach design strength.
I sequence grout hole 3,1.2 times of pitch of holes d no more than grouting dilation angle r；Number of rows is embedding according to intact geomembrane 1
Gu length a and spacing d is determined, usual 1~2 row；Single row of holes number is according to plane projection width c, distance b and the spacing d of geomembrane 1
It determines.
II sequence grout hole 4,1.2 times of pitch of holes d no more than grouting dilation angle r；Number of rows is 1 row；Hole count is according to rigidity
The thickness e and pitch of holes d of cut-pff wall 2 determine, usually in each 1 hole in upstream and downstream side, increase when thickness e is greater than pitch of holes d in centre
If a hole.
Rigid cut-pff wall 2, including and it is not limited to concrete cut, jet grouted barrier wall；It is taken with second phase gelling rock structure 6
Spreading degree f is not less than thickness e；Retain safe distance g between phase gelling rock structure 5, is destroyed when to avoid construction complete
At phase gelling rock structure 5 and intact geomembrane 1, safe distance g is according to the construction method and construction work of rigid cut-pff wall 2
Skill requires concrete analysis to determine.
Controlling grouting, grouting pressure is small, generally 0.2~0.8MPa, specific strengthening motoring according to filling body material and
The requirements such as design strength, permeance property are determined by test；Nozzle slurry flow rate is small, and the existing filling body of failure by shear, does not break
Bad existing intact geomembrane anti-seepage body.
The utility model is implemented generally according to following steps:
1, boundary condition is collected: being designed by the detection of leakage section and rigid cut-pff wall and is determined tap points position；According to design
Leakage preventing structure Intensity and permeability can require, controlling strengthening motoring is determined by field test, passes through water blocking head and soil
Work film detailing requiments determine geomembrane anchorage length a, and by detecting and collecting dam (cofferdam) work progress data, analysis is determined
The detection of geomembrane plane of arrangement projection width；
2, grout hole layout design:
1. determining I sequence grout hole number of rows according to geomembrane anchorage length a and grouting dilation angle r；
2. determining single interior hole count according to geomembrane plane projection width c and grouting dilation angle r；
3. determining that its lap of splice f and II sequence between second phase gelling rock structure fills according to rigid cut-pff wall thickness e
Starch the single hole count in hole；
4. determining it to the safety between phase gelling rock structure according to rigid impervious wall construction method and technique requirement
The number of rows of distance g and II sequence grout hole；
5. selecting the drillings such as hole deviation deviation, hole location deviation according to conditions such as hole depths controls standard；
3, connection structure is constructed:
1. arranging according to the grout hole of design, well cementing is carried out to I sequence grout hole；
2. carrying out rigid cut-pff wall joint section construction after the grouting of I sequence is completed and intensity reaches 70% or more；
3. carrying out drilling filling to II sequence grout hole after rigid cut-pff wall joint section is completed and intensity reaches 70% or more
Slurry, connection structure construction is completed after reaching design strength；
4. grouting pressure 0.2~0.8MPa, the I sequence hole general 500~800kg/m of grout consumption, II sequence and later grout hole
Grout consumption general 500~600kg/m takes according to consumption slurry abnormal conditions in filling process plus sand plus accelerator, reduces pressure etc.
Treatment measures.
Claims (8)
1. a kind of geomembrane core-wall and rigid cut-pff wall connection structure, including intact geomembrane (1) and rigid cut-pff wall (2),
Be characterized in that: the inner end positions of the intact geomembrane (1) are fixed with phase gelling rock structure (5), rigid cut-pff wall (2)
Inner end positions are fixed with second phase gelling rock structure (6), and phase gelling rock structure (5) is in the milk by I sequence grout hole (3), and two
Phase gelling rock structure (6) passes through II sequence grout hole (4) and is in the milk；One phase was gelled rock structure (5) as muti-piece, and every piece of radius is not small
In 50cm；Second phase gelling rock structure (6) is muti-piece, and every piece of radius is not less than 50cm.
2. geomembrane core-wall as described in claim 1 and rigid cut-pff wall connection structure, it is characterised in that: the I sequence grouting
The pitch of holes in hole (3) is not more than 1.2 times of the grouting radius of phase gelling rock structure (5).
3. geomembrane core-wall as described in claim 1 and rigid cut-pff wall connection structure, it is characterised in that: the II sequence grouting
The pitch of holes in hole (4) is not more than 1.2 times of the grouting radius of second phase gelling rock structure (6).
4. geomembrane core-wall as described in claim 1 and rigid cut-pff wall connection structure, it is characterised in that: the intact geotechnique
The anchorage length of film (1) is not less than 50cm.
5. geomembrane core-wall as described in claim 1 and rigid cut-pff wall connection structure, it is characterised in that: the phase gelling
Rock structure (5) is in the milk by I sequence grout hole (3), refers to that carrying out controlling grouting to I sequence grout hole (3) fills out dam body soil stone
Build material (7) cementing formation.
6. geomembrane core-wall as described in claim 1 and rigid cut-pff wall connection structure, it is characterised in that: the second phase gelling
Rock structure (6) is in the milk by II sequence grout hole (4), is referred to and is carried out controlling grouting for dam body soil stone to II sequence grout hole (4)
Fill material (7) cementing formation.
7. geomembrane core-wall as described in claim 1 and rigid cut-pff wall connection structure, it is characterised in that: the rigidity antiseepage
Wall (2) and second phase gelling rock structure (6) lap of splice are not less than the thickness of rigid cut-pff wall (2).
8. geomembrane core-wall as described in claim 1 and rigid cut-pff wall connection structure, it is characterised in that: the rigidity antiseepage
Retain safe distance between wall (2) and phase gelling rock structure (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822095896.2U CN209482263U (en) | 2018-12-13 | 2018-12-13 | A kind of geomembrane core-wall and rigid cut-pff wall connection structure |
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| CN201822095896.2U CN209482263U (en) | 2018-12-13 | 2018-12-13 | A kind of geomembrane core-wall and rigid cut-pff wall connection structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109469019A (en) * | 2018-12-13 | 2019-03-15 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of geomembrane core-wall and rigid cut-pff wall connection structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109469019A (en) * | 2018-12-13 | 2019-03-15 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of geomembrane core-wall and rigid cut-pff wall connection structure |
| CN109469019B (en) * | 2018-12-13 | 2024-03-19 | 中国电建集团贵阳勘测设计研究院有限公司 | Geomembrane core wall and rigid impervious wall connection structure |
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