CN103243681A - Flexible connection method for geomembrane for earth and rockfill dam seepage proofing and concrete building - Google Patents
Flexible connection method for geomembrane for earth and rockfill dam seepage proofing and concrete building Download PDFInfo
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- CN103243681A CN103243681A CN2013101815448A CN201310181544A CN103243681A CN 103243681 A CN103243681 A CN 103243681A CN 2013101815448 A CN2013101815448 A CN 2013101815448A CN 201310181544 A CN201310181544 A CN 201310181544A CN 103243681 A CN103243681 A CN 103243681A
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Abstract
The invention discloses a flexible connection method for a geomembrane for earth and rockfill dam seepage proofing and a concrete building. A polysulfide sealant layer is added between the concrete building and the composite geomembrane for flexible connection, and a smooth surface geomembrane layer is added, so that the overall laying strength of the geomembrane is strengthened. The elastic recovery rate of a polysulfide sealant is larger than or equal to 70%, the drawing across measure is larger than 0.4MPa at the temperature of 23 DEG C, so that by the aid of good softness, low-temperature flexibility of the polysulfide sealant as well as strong cohesive property with concrete, tear at the position where the geomembrane and the concrete building are connected can be effectively prevented, and leakage of reservoir water along the position where the geomembrane and the concrete building are connected can be avoided. The flexible construction method has the advantages that the construction is easy, and the settlement deformation resistance is high.
Description
Technical field
The present invention relates to the geomembrane anti-seepage technology in the water-control project, especially relate to the flexible connecting method between a kind of earth and rockfill dam antiseepage usefulness geomembrane and the concrete construction.
Background technology
Composite geo-membrane is that geotextiles and geomembrane are combined with each other, form a cloth one film or structures such as two cloth, one film, a cloth two films, product has the intensity height, physical and mechanical property index height such as tension, tear-proof, anti-top, good extending performance, modulus of deformation are big, acid-alkali-corrosive-resisting, ageing-resistant, characteristics such as barrier performance is good, can satisfy needs such as antiseepage in the engineering constructions such as water conservancy, municipal administration, building, tunnel, isolation.In water-control project, the application of geomembrane anti-seepage technology in the earth and rockfill dam antiseepage develops rapidly, and obtained good anti-seepage effect and good economic benefits.But when practice of construction, because filling, earth and rockfill dam can produce certain settling amount after material was finished in construction period and filling, and easily form differential settlement between the concrete structure, differential settlement between earth and rockfill dam and the concrete structure is very easy to cause the drawing crack of geomembrane, form leakage passage, cause the storehouse water loss, when serious even jeopardize dam safety.So whether being connected between geomembrane and the concrete be proper, can the junction adapt to above-mentioned inhomogeneous deformation, is to adopt whether one of successful key of geomembrane anti-seepage technology.
Summary of the invention
The object of the present invention is to provide the flexible connecting method between a kind of earth and rockfill dam antiseepage usefulness geomembrane and the concrete construction, this method can adapt to earth and rockfill dam and fill inhomogeneous sedimentation and deformation between material and the concrete structure, reaches good anti-seepage effect.
For achieving the above object, the present invention can take following technical proposals:
The flexible connecting method of earth and rockfill dam antiseepage of the present invention between geomembrane and the concrete construction, it comprises following construction sequence:
The first step is filled the material grinding compacting with the earth and rockfill dam body, fills making bedding material and grinding compacting on the material at the earth and rockfill dam body, and the differential settlement that fills between material and the concrete structure according to earth and rockfill dam arranges the bedding material protuberance in the suitable distance of distance concrete structure;
Second step, lay the composite geo-membrane of two cloth, one membrane structure at bedding material, the upper layer of fabric layer of the composite geo-membrane at close concrete structure place is uncovered, uncover length and extend to the rear portion of bedding material bump pad, the layer fabric layer with composite geo-membrane is connected with concrete structure with dowel with a cloth one film that the light facial mask is formed then;
The 3rd step, the surfacing of concrete structure is smooth, clean out, keep dry;
The 4th step
,With the concrete structure surface of polysulfide sealant brushing above dowel, form the fluid sealant band of thick 10cm, a width＞15cm;
The 5th step, lay at the light facial mask of the composite geo-membrane of the upper layer of fabric layer of uncovering and to strengthen light face geomembrane, be positioned on the enhancing light face geomembrane at bedding material protuberance rear portion and smear KS glue, overlap into one lap length 〉=10cm with the light facial mask of composite geo-membrane; The two sides of the enhancing light face geomembrane of the other end is one, lap length 〉=10cm with fluid sealant band overlap joint after all smearing KS glue;
The 6th step, with the upper layer of fabric layer of the composite geo-membrane uncovered with KS gluing be connected on enhancing light face geomembrane above;
The 7th step, making preservative and bank protection successively on the geomembrane that laying is finished.
The invention has the advantages that easy construction, anti-sedimentation and deformation ability is strong.Increase the polysulfide sealant layer between concrete structure and the composite geo-membrane and flexibly connected, and set up one deck light face geotechnique rete, strengthened the geotechnological film strength of whole laying.Because elastic restoration ratio 〉=70% of polysulfide sealant, 23 ℃ of time＞0.4 MPa of the horizontal amount that stretches, so rely on caking property stronger between the good flexibility of polysulfide sealant, the rich song of low temperature and the concrete, can effectively prevent tearing of geomembrane and concrete structure junction, avoid storehouse water along geomembrane and concrete structure junction seepage.
Description of drawings
Fig. 1 is the schematic diagram of method of attachment of the present invention.
The specific embodiment
As shown in Figure 1, the flexible connecting method of earth and rockfill dam antiseepage of the present invention between geomembrane and the concrete construction, it comprises following construction sequence:
The first step is filled material 1 grinding compacting with the earth and rockfill dam body, and relative density is not less than 0.75; Fill making bedding material 2 and grinding compacting on the material 1 at the earth and rockfill dam body, relative density is not less than 0.7; The differential settlement that fills between material 1 and the concrete structure 3 according to earth and rockfill dam arranges the bedding material protuberance in the suitable distance of distance concrete structure 3, as the bedding material apart from concrete structure 50cm distance being arranged the protuberance of 20cm at least;
Second step, lay the composite geo-membrane 4 of two cloth, one membrane structure at bedding material 2, the upper layer of fabric layer 5 of the composite geo-membrane 4 at close concrete structure place is uncovered, uncover length and extend to the rear portion of bedding material 2 bump pads, the layer fabric layer with composite geo-membrane 4 is connected with concrete structure 3 with dowel 6 with a cloth one film that the light facial mask is formed then;
The 3rd step, the surfacing of concrete structure 3 is smooth, clean out, keep dry;
The 4th step
,With the concrete structure surface of polysulfide sealant brushing above dowel 6, form the fluid sealant band 7 of thick 10cm, a width 25cm;
The 5th step, lay at the light facial mask of the composite geo-membrane of the upper layer of fabric layer of uncovering 5 and to strengthen light face geomembrane 8, be positioned on the enhancing light face geomembrane 8 at bedding material 2 protuberance rear portions and smear KS glue, overlap into one lap length 〉=10cm with the light facial mask of composite geo-membrane; The two sides of the enhancing light face geomembrane 8 of the other end is one, lap length 〉=10cm with fluid sealant band 7 overlap joints after all smearing KS glue;
The 6th step, with upper layer of fabric layer 5 usefulness the KS of the composite geo-membrane 4 uncovered gluing be connected on enhancing light face geomembrane 8 above;
The 7th step, making preservative 9 and bank protection 10 successively on the geomembrane that laying is finished.
Claims (1)
1. an earth and rockfill dam antiseepage is with the flexible connecting method between geomembrane and the concrete construction, and it is characterized in that: it comprises following construction sequence:
The first step, the earth and rockfill dam body is filled material (1) grinding compacting, fill material (1) at the earth and rockfill dam body and go up making bedding material (2) and grinding compacting, the differential settlement that fills between material (1) and the concrete structure (3) according to earth and rockfill dam arranges the bedding material protuberance in the suitable distance of distance concrete structure (3);
Second step, lay the composite geo-membrane (4) of two cloth, one membrane structure at bedding material (2), the upper layer of fabric layer (5) of the composite geo-membrane (4) at close concrete structure place is uncovered, uncover length and extend to the rear portion of bedding material (2) bump pad, the layer fabric layer with composite geo-membrane (4) is connected with concrete structure (3) with dowel (6) with a cloth one film that the light facial mask is formed then;
The 3rd step, the surfacing of concrete structure (3) is smooth, clean out, keep dry;
In the 4th step, with the concrete structure surface of polysulfide sealant brushing in dowel (6) top, form the fluid sealant band (7) of thick 10cm, a width＞15cm;
The 5th step, lay at the light facial mask of the composite geo-membrane of the upper layer of fabric layer of uncovering (5) and to strengthen light face geomembrane (8), be positioned on the enhancing light face geomembrane (8) at bedding material (2) protuberance rear portion and smear KS glue, overlap into one lap length 〉=10cm with the light facial mask of composite geo-membrane; The two sides of the enhancing light face geomembrane (8) of the other end is one, lap length 〉=10cm with fluid sealant band (7) overlap joint after all smearing KS glue;
The 6th step, with the upper layer of fabric layer (5) of the composite geo-membrane (4) uncovered with KS gluing be connected on enhancing light face geomembrane (8) above;
The 7th step, making preservative (9) and bank protection (10) successively on the geomembrane that laying is finished.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101815448A CN103243681A (en) | 2013-05-16 | 2013-05-16 | Flexible connection method for geomembrane for earth and rockfill dam seepage proofing and concrete building |
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| CN2013101815448A CN103243681A (en) | 2013-05-16 | 2013-05-16 | Flexible connection method for geomembrane for earth and rockfill dam seepage proofing and concrete building |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105544570A (en) * | 2016-01-21 | 2016-05-04 | 浙江省水利水电勘测设计院 | Connecting structure for earth rock cofferdam seepage-proof geomembrane and concrete cofferdam |
| CN109736452A (en) * | 2019-01-03 | 2019-05-10 | 北京京水建设集团有限公司 | A kind of construction method of conditioning tank leakage preventing structure |
| CN112195862A (en) * | 2020-09-09 | 2021-01-08 | 中国电建集团华东勘测设计研究院有限公司 | Anti-seepage joint structure of geomembrane anti-seepage panel and concrete anti-seepage wall and construction method |
| CN113802523A (en) * | 2020-06-16 | 2021-12-17 | 中国水利水电第九工程局有限公司 | Anti-seepage earth dam heightening construction process |
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| EP1790776A1 (en) * | 2005-11-23 | 2007-05-30 | Gsi B.V. | Method and system for waterproofing and draining off infiltrated water in hydraulic structures |
| CN202164579U (en) * | 2011-07-19 | 2012-03-14 | 中国水电顾问集团中南勘测设计研究院 | Stepped concrete connecting structure for seepage-proof geomembrane of earth-rock dam or cofferdam and abrupt slope rock foundation |
| CN202830882U (en) * | 2012-09-21 | 2013-03-27 | 中国水电顾问集团华东勘测设计研究院 | Geomembrane impervious structure on concrete dam upstream surface |
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2013
- 2013-05-16 CN CN2013101815448A patent/CN103243681A/en active Pending
Patent Citations (3)
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| EP1790776A1 (en) * | 2005-11-23 | 2007-05-30 | Gsi B.V. | Method and system for waterproofing and draining off infiltrated water in hydraulic structures |
| CN202164579U (en) * | 2011-07-19 | 2012-03-14 | 中国水电顾问集团中南勘测设计研究院 | Stepped concrete connecting structure for seepage-proof geomembrane of earth-rock dam or cofferdam and abrupt slope rock foundation |
| CN202830882U (en) * | 2012-09-21 | 2013-03-27 | 中国水电顾问集团华东勘测设计研究院 | Geomembrane impervious structure on concrete dam upstream surface |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105544570A (en) * | 2016-01-21 | 2016-05-04 | 浙江省水利水电勘测设计院 | Connecting structure for earth rock cofferdam seepage-proof geomembrane and concrete cofferdam |
| CN109736452A (en) * | 2019-01-03 | 2019-05-10 | 北京京水建设集团有限公司 | A kind of construction method of conditioning tank leakage preventing structure |
| CN113802523A (en) * | 2020-06-16 | 2021-12-17 | 中国水利水电第九工程局有限公司 | Anti-seepage earth dam heightening construction process |
| CN112195862A (en) * | 2020-09-09 | 2021-01-08 | 中国电建集团华东勘测设计研究院有限公司 | Anti-seepage joint structure of geomembrane anti-seepage panel and concrete anti-seepage wall and construction method |
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Application publication date: 20130814 |