CN105568928A - Construction method of sealed joint of composite geomembrane face dam - Google Patents
Construction method of sealed joint of composite geomembrane face dam Download PDFInfo
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- CN105568928A CN105568928A CN201511025018.8A CN201511025018A CN105568928A CN 105568928 A CN105568928 A CN 105568928A CN 201511025018 A CN201511025018 A CN 201511025018A CN 105568928 A CN105568928 A CN 105568928A
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- geomembrane
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- sealing seam
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- dam
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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)
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Abstract
The invention discloses a construction method of a sealed joint of a composite geomembrane face dam. A new structure is provided with regard to a design of burying a geomembrane, which is several meters long, in an existing sealed joint of a geomembrane face dam in a folding manner to increase a seepage path. By means of such a structure, the length of the geomembrane buried in the folding manner can be greatly shortened, and a ''stainless steel folding fan type V-shaped corrugated water stop'' on a surface layer is used as the water stop of the sealed joint. Such a structure is also universal to all sealed joints such as toe slab joints with equal-altitude or different-altitude supports on two sides, peripheral joints, dam top sealed joints and the like; the stainless steel folding fan type V-shaped corrugated water stop is formed by pressing a stainless steel material that is less than 1mm thick into V-shaped corrugations that are only about 20mm high, and has great flexibility, under which a mixed elastic cushion composed of PVC solid balls, fine sand and clay is supplemented, and therefore, such a water stop is reliable in working and extremely high in adaptability to deformation.
Description
Technical field
The present invention relates to the construction method of a kind of compound geomembrane facing slab dam sealing seam, specifically, is the construction method of the seam of a kind of toe board seam of geomembrane face dam, periphery fissure and wave wall.
Background technology
Because the impervious body thickness on compound geomembrane facing slab dam has the concrete thickness of at least 30cm to bury underground the space of " three road sealings " unlike steel concrete face dam, conventional way processes with the way extending geomembrane " seepage paths ", and this " seepage paths " often needs the geomembrane burying several meters long underground.This water seal design, needs to bury underground in the larger context, complex structure, and construction face width, quality control difficulty is large, and the reliability of antiseepage neither be very high.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of geomembrane that shortens to fold built-in length, reliable operation, the construction method of the compound geomembrane facing slab dam sealing seam that adaptive deformation is very capable.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: the construction method of a kind of compound geomembrane facing slab dam sealing seam, comprises the following steps:
(1) U-shaped composite geo-membrane pre-buried in sealing seam: after the form removable of seam surface concrete, the rare pitch of brush one deck, composite geo-membrane is curved the U-shaped of lining adventitia, geotechnological face outside U-shaped composite geo-membrane one is pasted onto above rare pitch, the geotechnological face also rare pitch of brush one deck outside another, paste steel mesh reinforcement, fixing U-shaped composite earthwork film location after-pouring concrete, form the constuction joint that one people is, the free end at U-shaped composite geo-membrane two is positioned at outside sealing seam, geomembrane can not be injured during concrete vibrating, sealing seam gutter below and dam body bed course are synchronously buried underground,
(2) free end at U-shaped composite geo-membrane two is connected with pre-buried fishtail bolt, before connection, disconnect geotextiles, separately adds a soft rubber backing plate, forces together with U-shaped composite geo-membrane, block possible penetrating passage; The free end of U-shaped composite geo-membrane after being connected with pre-embedded bolt, then reserving certain length and directly welds with the geomembrane of dam facing panel or be connected with bolt;
(3) lay one deck in the sealing side of sewing on and be mixed with the Extra-fine sand of PVC full particle ball that diameter is 1cm ~ 3cm, the elastic filler of clay mix, manual compaction, lay stainless steel V-arrangement ripple waterstop above elastic filler, stainless steel V-arrangement ripple waterstop two ends are fixed on pre-buried fishtail bolt together with the free end of U-shaped composite geo-membrane;
(4) on V-arrangement ripple waterstop and fishtail bolt with the whole packing of bitumastic, packing thickness is not less than 20cm.
Described composite geo-membrane is two-sided or one side are added rough LLDPE geomembrane and geotextiles in factory or on-the-spot compound.
The convex-concave difference of described LLDPE geomembrane is 0.25mm, and thickness is greater than 2mm, and described geotextiles is>=600g/m
2polyester PET filament nonwoven geotextiles.
In described step (1), the degree of depth of described U-shaped composite geo-membrane in sealing seam is 60-80cm.
Described stainless steel V-arrangement ripple waterstop is stainless steel plication V-arrangement ripple waterstop.
The thickness of slab of described stainless steel V-arrangement ripple waterstop does not exceed 1mm, wave height 10-22mm, adopts the soft stainless steel of Low Carbon Iron ferritic.
Described sealing seam is that toe board seam, periphery fissure and dam crest stitch.
The invention has the beneficial effects as follows: on the basis of drawing existing geomembrane face dam sealing seam antiseepage thinking, greatly shorten geomembrane and fold built-in length, with top layer together " stainless steel plication V-arrangement ripple waterstop " be main, only the one that folding a small amount of U-shaped geomembrane lay in as stop safe water is combined.This waterstop form can also be common to all sealings such as both sides bearing contour or not contour toe board seam, periphery fissure and dam crest sealing seam and sew on.
Accompanying drawing explanation
Fig. 1 is the sealing crack structure figure of the construction method construction of compound geomembrane facing slab dam of the present invention sealing seam.
Fig. 2 is the partial enlarged drawing of Fig. 1.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
As shown in Figure 1, 2, the construction method of compound geomembrane facing slab dam of the present invention sealing seam, comprises the following steps:
(1) U-shaped composite geo-membrane pre-buried in sealing seam: after the form removable of seam surface concrete, the rare pitch of brush one deck, composite geo-membrane is curved the U-shaped of lining adventitia, geotechnological face 10 outside U-shaped composite geo-membrane 1 one is pasted onto above rare pitch, the geotechnological face 10 also rare pitch of brush one deck outside another, paste steel mesh reinforcement 2 after-pouring concrete, form the constuction joint that one people is, the free end at U-shaped composite geo-membrane 1 two is positioned at outside sealing seam, geomembrane can not be injured during concrete vibrating, sealing seam gutter 9 below and dam body bed course are synchronously buried underground, application 600g/m before gutter 9
2polyester PET filament nonwoven geotextiles 13 wrap up,
(2) free end at U-shaped composite geo-membrane two is connected with pre-buried fishtail bolt 3, before connection, geotextiles 11 to be disconnected before soft rubber backing plate 4, separately add a soft rubber backing plate 4, force together with the geomembrane 10 of U-shaped composite geo-membrane 1, block possible penetrating passage; The free end of U-shaped composite geo-membrane after being connected with pre-embedded bolt, then reserving certain length and directly welds with the geomembrane of dam facing panel or be connected with bolt;
(3) lay one deck in the sealing side of sewing on and be mixed with the Extra-fine sand of PVC full particle ball 7 that diameter is 1cm ~ 3cm, the elastic filler of clay mix, manual compaction, lay stainless steel V-arrangement ripple waterstop 6 above elastic filler, stainless steel V-arrangement ripple waterstop two ends are fixed on pre-buried fishtail bolt 3;
(4) on V-arrangement ripple waterstop and fishtail bolt, use bitumastic 8 all packings, packing thickness is minimum is not less than 20cm.
Described composite geo-membrane is two-sided or one side are added rough LLDPE geomembrane 10 with geotextiles 11 in factory or on-the-spot compound.
The convex-concave difference of described LLDPE geomembrane 10 is 0.25mm, and thickness is greater than 2mm, and described geotextiles 11 is>=600g/m
2polyester PET filament nonwoven geotextiles.
In described step (1), the degree of depth of described U-shaped composite geo-membrane in sealing seam is 80-60cm.
Described V-arrangement ripple waterstop is stainless steel plication V-arrangement ripple waterstop 6.
The thickness of slab of described V-arrangement ripple waterstop does not exceed 1mm, wave height 10-22mm, adopts the soft stainless steel of Low Carbon Iron ferritic.
Described sealing seam is that toe board seam, periphery fissure and dam crest stitch.
Specifically:
In sealing seam, U-shaped composite geo-membrane 1 is pre-buried: after the form removable of seam surface concrete, the rare pitch of brush one deck, composite geo-membrane is curved the U-shaped of lining adventitia, the geotechnological face 10 of U-shaped composite geo-membrane 1 side is pasted onto above rare pitch, opposite side geotechnique's face 10 also rare pitch of brush one deck, paste steel mesh reinforcement 2 after-pouring concrete, form the constuction joint that one people is, the free end at U-shaped composite geo-membrane two is positioned at outside sealing seam, can not injure geomembrane during concrete vibrating, sealing seam gutter 9 below and dam body bed course 10 are synchronously buried underground; The free end at U-shaped composite geo-membrane 1 two is connected with pre-buried fishtail bolt 3, before connection, disconnect geotextiles, and the soft rubber backing plate 4 separately adding a thick 20mm forces together with the geomembrane of U-shaped composite geo-membrane, blocks possible penetrating passage.Notice that the reserved geomembrane at U-shaped composite geo-membrane two ends must reserve the relaxed length of at least 5cm-10cm, stitch possible three-dimensional displacement 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 and directly weld (waterproof weld seam twice) with the geomembrane of dam facing panel or be connected with bolt.
Geomembrane panel on dam facing near sealing seam about one meter to arrange and stitch together almost parallel panel with sealing and to relax groove 5, this groove is finally with lightweight aggregate geotextiles woven bag 12 pressure slope.
Before sealing is sewn on and lays stainless steel V-arrangement ripple waterstop 6, first should lay the elastic filler of one deck by the PVC full particle ball 7 (30%) of diameter d=1cm ~ 3cm and appropriate Extra-fine sand, clay mix, with manual compaction, middle part can suitably raising, in this, as the bearing foundation of stainless steel V-arrangement waterstop.
Be placed directly in above the elastic filler of compacting by stainless steel V-arrangement ripple waterstop 6, the soft rubber backing plate 4 and upper and lower geomembrane compact siro spinning technology that 20mm is thick is used at two ends in the band steel stage support of pre-buried fishtail bolt 3.
With bitumastic 8 all packings on V-arrangement ripple waterstop (comprising the connecting bolt at two ends), packing thickness is minimum is not less than 20cm.On the R-joining face of periphery fissure, in order to ensure the minimum packing height of bitumastic, sectional establishes prefabricated baffle plate, stepped packing.
Above-described embodiment is only for illustration of technological thought of the present invention and feature, its object is to enable those skilled in the art understand content of the present invention and implement according to this, only can not limit the scope of the claims of the present invention with the present embodiment, namely the equal change done of all disclosed spirit or modification, still drop in the scope of the claims of the present invention.
Claims (7)
1. a construction method for compound geomembrane facing slab dam sealing seam, is characterized in that, comprise the following steps:
(1) U-shaped composite geo-membrane pre-buried in sealing seam: after the form removable of seam surface concrete, the rare pitch of brush one deck, composite geo-membrane is curved the U-shaped of lining adventitia, geotechnological face outside U-shaped composite geo-membrane one is pasted onto above rare pitch, the geotechnological face also rare pitch of brush one deck outside another, paste steel mesh reinforcement, fixing U-shaped composite earthwork film location after-pouring concrete, form the constuction joint that one people is, the free end at U-shaped composite geo-membrane two is positioned at outside sealing seam, geomembrane can not be injured during concrete vibrating, sealing seam gutter below and dam body bed course are synchronously buried underground,
(2) free end at U-shaped composite geo-membrane two is connected with pre-buried fishtail bolt, before connection, disconnect geotextiles, separately adds a soft rubber backing plate, forces together with U-shaped composite geo-membrane, block possible penetrating passage; The free end of U-shaped composite geo-membrane after being connected with pre-embedded bolt, then reserving certain length and directly welds with the geomembrane of dam facing panel or be connected with bolt;
(3) lay one deck in the sealing side of sewing on and be mixed with the Extra-fine sand of PVC full particle ball that diameter is 1cm ~ 3cm, the elastic filler of clay mix, manual compaction, lay stainless steel V-arrangement ripple waterstop above elastic filler, stainless steel V-arrangement ripple waterstop two ends are fixed on pre-buried fishtail bolt together with the free end of U-shaped composite geo-membrane;
(4) on V-arrangement ripple waterstop and fishtail bolt with the whole packing 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, is characterized in that, described composite geo-membrane is two-sided or one side are added rough LLDPE geomembrane and geotextiles in factory or on-the-spot compound.
3. the construction method of compound geomembrane facing slab dam according to claim 2 sealing seam, it is characterized in that, the convex-concave difference of described LLDPE geomembrane is 0.25mm, and thickness is greater than 2mm, and described geotextiles is>=600g/m
2polyester PET filament nonwoven geotextiles.
4. the construction method of compound geomembrane facing slab dam according to claim 1 sealing seam, is characterized in that, in described step (1), the degree of depth of described 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 characterized 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 characterized in that, the thickness of slab of described stainless steel V-arrangement ripple waterstop does not exceed 1mm, wave height 10-22mm, adopts the soft stainless steel of Low Carbon Iron ferritic.
7. the construction method of the compound geomembrane facing slab dam sealing seam according to any one of claim 1-6, is characterized in that, described sealing seam is that toe board seam, periphery fissure and dam crest stitch.
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| 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 true CN105568928A (en) | 2016-05-11 |
| CN105568928B CN105568928B (en) | 2017-07-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107246148A (en) * | 2017-06-13 | 2017-10-13 | 河南省水利第工程局 | Thin wall concrete is to drawing screw water sealing structure and sealing technique |
| 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 |
| WO2019237908A1 (en) * | 2018-06-12 | 2019-12-19 | 济南城建集团有限公司 | Blocking and drainage combined treatment method for water leakage at construction joint of secondary lining of tunnel |
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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 |
| JP2010090689A (en) * | 2009-07-10 | 2010-04-22 | Hokuriku Regional Agricultural Administration Office Maff | Method for measuring water leakage in water channel |
| 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 |
| CN104372770A (en) * | 2014-11-05 | 2015-02-25 | 华北水利水电大学 | Rubber face plate rockfill dam and construction method thereof |
| CN104762925A (en) * | 2015-04-13 | 2015-07-08 | 长江勘测规划设计研究有限责任公司 | Concrete face dam peripheral joint water sealing structure and construction method thereof |
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2015
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| JP2010090689A (en) * | 2009-07-10 | 2010-04-22 | Hokuriku Regional Agricultural Administration Office Maff | Method for measuring water leakage in water channel |
| 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 |
| CN104372770A (en) * | 2014-11-05 | 2015-02-25 | 华北水利水电大学 | Rubber face plate rockfill dam and construction method thereof |
| CN104762925A (en) * | 2015-04-13 | 2015-07-08 | 长江勘测规划设计研究有限责任公司 | Concrete face dam peripheral joint water sealing structure and construction method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107246148A (en) * | 2017-06-13 | 2017-10-13 | 河南省水利第工程局 | Thin wall concrete is to drawing screw water sealing structure and sealing technique |
| WO2019237908A1 (en) * | 2018-06-12 | 2019-12-19 | 济南城建集团有限公司 | Blocking and drainage combined treatment method for water leakage at construction joint of secondary lining of tunnel |
| 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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| CN105568928B (en) | 2017-07-28 |
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