CN105568928B - A kind of construction method of compound geomembrane facing slab dam sealing seam - Google Patents
A kind of construction method of compound geomembrane facing slab dam sealing seam Download PDFInfo
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- CN105568928B CN105568928B CN201511025018.8A CN201511025018A CN105568928B CN 105568928 B CN105568928 B CN 105568928B CN 201511025018 A CN201511025018 A CN 201511025018A CN 105568928 B CN105568928 B CN 105568928B
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- sealing seam
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
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- General Engineering & Computer Science (AREA)
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- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
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Abstract
The invention discloses the new construction that a kind of construction method of compound geomembrane facing slab dam sealing seam, the design with the embedded number meter Chang Du of folding geomembrane to increase seepage paths in being stitched for existing geomembrane face dam sealing are proposed.It can greatly shorten geomembrane and fold built-in length, with the top layer sealing that " stainless steel plication V-arrangement ripple waterstop " is stitched as sealing together.It can also be common to all sealings such as the contour or not contour toe board seam of both sides bearing, periphery fissure and dam crest sealing seam and sew on；Stainless steel plication V-arrangement ripple waterstop uses below thickness 1mm stainless steel material, wave height only 20mm or so V-arrangement ripple is squeezed into, with larger flexibility, PVC medicine balls and fine sand, the mixing elastic insert of clay composition are aided with below, reliable operation, adaptive deformation is very capable.
Description
Technical field
It is a kind of geotechnological film surface specifically the present invention relates to a kind of construction method of compound geomembrane facing slab dam sealing seam
The toe board seam on plate dam, the construction method of the seam of periphery fissure and wave wall.
Background technology
Because the antiseepage body thickness on compound geomembrane facing slab dam has at least 30cm coagulation unlike armored concrete face dam
Soil thickness buries the space of " three road sealings ", and conventional method handled with extending the method for geomembrane " seepage paths ", this
Individual " seepage paths " generally requires to bury several meters of long geomembranes.This water seal design, it is necessary to bury in the larger context, and structure is multiple
Miscellaneous, construction surface is wide, and quality control difficulty is big, and antiseepage reliability nor very high.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of geomembrane that shortens and fold built-in length, and reliable operation is fitted
The construction method of very capable compound geomembrane facing slab dam sealing seam should be deformed.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of compound geomembrane facing slab dam sealing
The construction method of seam, comprises the following steps：
(1) U-shaped composite geo-membrane is pre-buried during sealing is stitched：After after seam surface concrete form removable, the dilute drip of one layer of brush
Green grass or young crops, composite geo-membrane is curved the U-shaped of lining outer membrane, and the geotechnological film surface in the outside of U-shaped composite geo-membrane one is pasted onto into dilute pitch
Above, the geotechnological film surface in another outside also one layer of dilute pitch of brush, pastes bar-mat reinforcement, fixed U-shaped composite earthwork film location after-pouring is mixed
Solidifying soil, forms the construction joint that one of people is, the free end at U-shaped composite geo-membrane two is located at sealing and stitches outer, during concrete vibrating
Geomembrane can not be injured, it is synchronous with dam body bed course embedded that sealing stitches following drainpipe；
(2) free end at U-shaped composite geo-membrane two is connected with pre-buried fish (-)bolt, before connection, to disconnect geotextiles, separately
Plus a soft rubber backing plate, forced together with U-shaped composite geo-membrane, block possible penetrating passage；U-shaped composite geo-membrane from
By holding after being connected with pre-embedded bolt, then reserve certain length and be directly welded or bolted with the geomembrane of dam facing panel and be connected；
(3) one layer of Extra-fine sand, clay mixed with a diameter of 1cm~3cm PVC full particle balls is laid in the sealing side of sewing on
Laying stainless steel V-arrangement ripple waterstop, stainless steel V-arrangement ripple sealing above the elastic filler of mix, manual compaction, elastic filler
It is fixed to two ends together with the free end of U-shaped composite geo-membrane on pre-buried fish (-)bolt；
(4) on V-arrangement ripple waterstop and fish (-)bolt with the whole packings of bitumastic, packing thickness is not less than
20cm。
The composite geo-membrane is to add rough LLDPE geomembranes multiple in factory or scene with geotextiles two-sided or one side
Close.
The convex-concave difference of the LLDPE geomembranes is 0.25mm, and thickness is more than 2mm, and the geotextiles are >=600g/m2It is poly-
Ester PET filament nonwoven geotextiles.
In the step (1), depth of the U-shaped composite geo-membrane in sealing seam is 60-80cm.
The stainless steel V-arrangement ripple waterstop is stainless steel plication V-arrangement ripple waterstop.
The thickness of slab of the stainless steel V-arrangement ripple waterstop does not exceed 1mm, wave height 10-22mm, soft using low-carbon ferrite
Property stainless steel.
The sealing seam stitches for toe board seam, periphery fissure and dam crest.
The beneficial effects of the invention are as follows：On the basis of existing geomembrane face dam sealing seam antiseepage thinking has been drawn, greatly
The big geomembrane that shortens folds built-in length, based on top layer together " stainless steel plication V-arrangement ripple waterstop ", only a small amount of folding
A kind of combination that U-shaped geomembrane is laid in as stop safe water.This sealing band forms can also be common to both sides bearing it is contour or
All sealings such as not contour toe board seam, periphery fissure and dam crest sealing seam are sewed on.
Brief description of the drawings
Fig. 1 is the sealing crack structure figure of the construction method construction of the compound geomembrane facing slab dam sealing seam of the present invention.
Fig. 2 is Fig. 1 partial enlarged drawing.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description：
As shown in Figure 1, 2, the construction method of compound geomembrane facing slab dam sealing seam of the invention, comprises the following steps：
(1) U-shaped composite geo-membrane is pre-buried during sealing is stitched：After after seam surface concrete form removable, the dilute drip of one layer of brush
Green grass or young crops, composite geo-membrane is curved the U-shaped of lining outer membrane, and the geotechnological film surface 10 in the outside of U-shaped composite geo-membrane 1 one is pasted onto into dilute drip
It is blue or green above, the geotechnological film surface 10 in another outside also one layer of dilute pitch of brush pastes the after-pouring concrete of bar-mat reinforcement 2, forming one of people is
Construction joint, it is outer that the free end at the two of U-shaped composite geo-membrane 1 is located at sealing seam, geomembrane can not be injured during concrete vibrating, only
The following drainpipe 9 of water seam is synchronous with dam body bed course embedded, and 600g/m is applied before drainpipe 92Polyester PET filament nonwoven geotechnique
Cloth 13 is wrapped up；
(2) free end at U-shaped composite geo-membrane two is connected with pre-buried fish (-)bolt 3, before connection, be in soft rubber backing plate
Geotextiles 11 are disconnected before 4, separately adds a soft rubber backing plate 4, is forced together with the geomembrane of U-shaped composite geo-membrane 1, obstruction may
Penetrating passage；The free end of U-shaped composite geo-membrane after being connected with pre-embedded bolt, then reserve certain length directly with dam facing face
The geomembrane of plate is welded or bolted connection；
(3) one layer of Extra-fine sand, viscous mixed with a diameter of 1cm~3cm PVC full particles ball 7 is laid in the sealing side of sewing on
Laying stainless steel V-arrangement ripple waterstop 6, stainless steel V-arrangement ripple above the elastic filler of native mix, manual compaction, elastic filler
Waterstop two ends are fixed on pre-buried fish (-)bolt 3；
(4) the whole packings of bitumastic 8 are used on V-arrangement ripple waterstop and fish (-)bolt, packing thickness is not minimum small
In 20cm.
The composite geo-membrane is to add rough LLDPE geomembranes multiple in factory or scene with geotextiles 11 two-sided or one side
Close.
The convex-concave difference of the LLDPE geomembranes 10 is 0.25mm, and thickness is more than 2mm, and the geotextiles 11 are >=600g/m2
Polyester PET filament nonwoven geotextiles.
In the step (1), depth of the U-shaped composite geo-membrane in sealing seam is 80-60cm.
The V-arrangement ripple waterstop is stainless steel plication V-arrangement ripple waterstop 6.
The thickness of slab of the V-arrangement ripple waterstop does not exceed 1mm, wave height 10-22mm, soft stainless using low-carbon ferrite
Steel.
The sealing seam stitches for toe board seam, periphery fissure and dam crest.
Specifically：
U-shaped composite geo-membrane 1 is pre-buried in sealing seam：After after seam surface concrete form removable, one layer of dilute pitch of brush,
Composite geo-membrane is curved to the U-shaped of lining outer membrane, the geotechnological film surface 10 of the side of U-shaped composite geo-membrane 1 is pasted onto on dilute pitch
Face, opposite side geotechnique's film surface 10 also one layer of dilute pitch of brush, pastes the after-pouring concrete of bar-mat reinforcement 2, forms the construction that one of people is
Seam, the free end at U-shaped composite geo-membrane two is located at outside sealing seam, can not be injured during concrete vibrating under geomembrane, sealing seam
The drainpipe 9 in face is synchronous with dam body bed course embedded；The free end at the two of U-shaped composite geo-membrane 1 is connected with pre-buried fish (-)bolt 3,
Before connection, geotextiles are disconnected, separately add thickness 20mm soft rubber backing plate 4 to be pressed in one with the geomembrane of U-shaped composite geo-membrane
Rise, block possible penetrating passage.At least 5cm- must be reserved by noting the reserved geomembrane at U-shaped composite geo-membrane two ends
10cm relaxed length, possible three-dimensional displacement is stitched to adapt to sealing.
The free end of U-shaped composite geo-membrane should after being connected with pre-embedded bolt, then reserve certain length directly with dam facing face
The geomembrane welding (waterproof weld seam twice) of plate is connected with.
Geomembrane panel on dam facing will set face almost parallel with sealing seam together for one meter or so near sealing seam
Plate relaxation groove 5, the groove finally uses the pressure slope of lightweight aggregate geotextiles woven bag 12.
Sealing is sewn on before laying stainless steel V-arrangement ripple waterstop 6, should first lay one layer of PVC by diameter d=1cm~3cm real
Heart particle ball 7 (30%) and appropriate Extra-fine sand, the elastic filler of clay mix, are manually compacted, middle part can suitably raising,
In this, as the bearing foundation of stainless steel V-arrangement waterstop.
Stainless steel V-arrangement ripple waterstop 6 is placed directly in above the elastic filler of compacting, two ends are in pre-buried fish (-)bolt 3
Band steel stage support on soft rubber backing plate 4 thick 20mm and geomembrane is closely connected up and down.
The whole packings of bitumastic 8 are used above in V-arrangement ripple waterstop (connecting bolt for including two ends), and packing thickness is most
It is small to be not less than 20cm.On the R-joining face of periphery fissure, in order to ensure the minimum packing height of bitumastic, sectional sets prefabricated
Baffle plate, stepped packing.
Embodiment described above is merely to illustrate the technological thought and feature of the present invention, in the art its object is to make
Technical staff it will be appreciated that present disclosure and implementing according to this, it is impossible to the patent model of the present invention is only limited with the present embodiment
Enclose, i.e., equal change or modification that all disclosed spirit is made, still fall in the scope of the claims of the present invention.
Claims (7)
1. the construction method of a kind of compound geomembrane facing slab dam sealing seam, it is characterised in that comprise the following steps：
(1) U-shaped composite geo-membrane is pre-buried during sealing is stitched：After after seam surface concrete form removable, one layer of dilute pitch of brush will
Composite geo-membrane curves the U-shaped of lining outer membrane, and the geotechnological film surface in the outside of U-shaped composite geo-membrane one is pasted onto above dilute pitch,
The geotechnological film surface in another outside also one layer of dilute pitch of brush, pastes bar-mat reinforcement, fixed U-shaped composite earthwork film location after-pouring concrete,
The construction joint that one of people is is formed, the free end at U-shaped composite geo-membrane two is located at outside sealing seam, can not hindered during concrete vibrating
Evil geomembrane, it is synchronous with dam body bed course embedded that sealing stitches following drainpipe；
(2) free end at U-shaped composite geo-membrane two is connected with pre-buried fish (-)bolt, before connection, to be disconnected geotextiles, separately Jia one
Bar soft rubber backing plate, forces together with U-shaped composite geo-membrane, blocks possible penetrating passage；The free end of U-shaped composite geo-membrane
After being connected with pre-embedded bolt, then reserve certain length and be directly welded or bolted with the geomembrane of dam facing panel and be connected；
(3) one layer of Extra-fine sand, clay mix mixed with a diameter of 1cm~3cm PVC full particle balls is laid in the sealing side of sewing on
Elastic filler, manual compaction, laying stainless steel V-arrangement ripple waterstop, stainless steel V-arrangement ripple waterstop two above elastic filler
End is fixed on pre-buried fish (-)bolt together with the free end of U-shaped composite geo-membrane；
(4) on V-arrangement ripple waterstop and fish (-)bolt with the whole packings of bitumastic, packing thickness is not less than 20cm.
2. the construction method of compound geomembrane facing slab dam according to claim 1 sealing seam, it is characterised in that described compound
Geomembrane is to add rough LLDPE geomembranes compound in factory or scene with geotextiles two-sided or one side.
3. the construction method of compound geomembrane facing slab dam according to claim 2 sealing seam, it is characterised in that described
The convex-concave difference of LLDPE geomembranes is 0.25mm, and thickness is more than 2mm, and the geotextiles are >=600g/m2Polyester PET long filament without
Spin geotextiles.
4. the construction method of compound geomembrane facing slab dam according to claim 1 sealing seam, it is characterised in that the step
(1) in, depth of the U-shaped composite geo-membrane in sealing seam is 60-80cm.
5. the construction method of compound geomembrane facing slab dam according to claim 1 sealing seam, it is characterised in that described stainless
Steel V-arrangement ripple waterstop is stainless steel plication V-arrangement ripple waterstop.
6. the construction method of compound geomembrane facing slab dam according to claim 5 sealing seam, it is characterised in that described stainless
The thickness of slab of steel V-arrangement ripple waterstop does not exceed 1mm, wave height 10-22mm, using the soft stainless steel of low-carbon ferrite.
7. the construction method of the compound geomembrane facing slab dam sealing seam according to claim any one of 1-6, it is characterised in that
The sealing seam stitches for toe board seam, periphery fissure and dam crest.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511025018.8A CN105568928B (en) | 2015-12-30 | 2015-12-30 | A kind of construction method of compound geomembrane facing slab dam sealing seam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511025018.8A CN105568928B (en) | 2015-12-30 | 2015-12-30 | A kind of construction method of compound geomembrane facing slab dam sealing seam |
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| CN105568928A CN105568928A (en) | 2016-05-11 |
| CN105568928B true CN105568928B (en) | 2017-07-28 |
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| CN107246148B (en) * | 2017-06-13 | 2022-06-21 | 河南省水利第一工程局 | Water stopping structure and water stopping process for thin-wall concrete split screw |
| CN108952774B (en) * | 2018-06-12 | 2019-04-23 | 济南城建集团有限公司 | A kind of method that tunnel double-lining construction joint leakage water blocking row combines punishment |
| CN109339117A (en) * | 2018-10-31 | 2019-02-15 | 长安大学 | A kind of biology is detained the bridging method of antiseepage film and barricade in facility |
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| JP2005023514A (en) * | 2003-06-30 | 2005-01-27 | Sumitomo Metal Ind Ltd | Water cut-off joint structure and its construction method |
| JP5083996B2 (en) * | 2009-07-10 | 2012-11-28 | 農林水産省北陸農政局長 | Water leak measurement method |
| CN203583439U (en) * | 2013-11-11 | 2014-05-07 | 葛洲坝集团第一工程有限公司 | Concrete faced rockfill dam plastic water stop construction trolley |
| CN104372770B (en) * | 2014-11-05 | 2016-08-24 | 华北水利水电大学 | Rubber panel rock-fill dams and construction method thereof |
| CN104762925B (en) * | 2015-04-13 | 2017-01-04 | 长江勘测规划设计研究有限责任公司 | Concrete face rockfill dam periphery fissure waterstop structure and construction method thereof |
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