CN202830882U - Geomembrane impervious structure on concrete dam upstream surface - Google Patents
Geomembrane impervious structure on concrete dam upstream surface Download PDFInfo
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- CN202830882U CN202830882U CN201220484669.9U CN201220484669U CN202830882U CN 202830882 U CN202830882 U CN 202830882U CN 201220484669 U CN201220484669 U CN 201220484669U CN 202830882 U CN202830882 U CN 202830882U
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- pvc composite
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Abstract
The utility model relates to a geomembrane impervious structure on a concrete dam upstream surface. The geomembrane impervious structure on the concrete dam upstream surface is saving in investment, convenient to construct and capable of solving the dam impervious problem. The technical scheme is that the geomembrane impervious structure on the concrete dam upstream surface is characterized in that the concrete dam upstream surface is sequentially provided with a draining geonet and a polyvinyl chloride (PVC) composite geo-membrane in a paving mode. The PVC composite geo-membrane is fixed on a dam surface in an anchoring mode through an anchoring mechanism and a peripheral anchoring waterstop mechanism, a draining system is formed by the draining geonet 4 and gaps which are positioned between the PVC composite geo-membrane and the dam surface and are generated by the anchoring mechanism, the bottom of the draining system is connected with a draining pipe. The geomembrane impervious structure on the concrete dam upstream surface is suitable for imperiously treating of the dam upstream surface under the condition that a reservoir of a dam which is built already is not discharged completely, solves the leakage problem of the dam, and is mainly suitable for concrete dam impermeable reinforcing processing.
Description
Technical field
The utility model relates to a kind of geomembrane anti-seepage structure, especially a kind of geomembrane anti-seepage structure of concrete dam upstream face.Be applicable to carry out in the situation of built not emptying of dam reservoir the antiseepage of dam upstream face and process, solve the seepage of dam problem, mainly be applicable to concrete dam anti-Seepage consolidation process.
Background technology
China has built many concrete dams from five sixties of last century, is limited to dam construction technique level at that time, and concrete quality is relatively poor, and there is hole in inside.Along with the dam increase of service time, inevitably various seepages can appear, and then cause the diseases such as corrosion, crack, freeze thawing, the rising of dam body uplift pressure, and had a strong impact on the intensity of dam, stable and durability, brought serious consequence for project benefit and safety.Therefore, the seepage treatment of concrete dam body seepage treatment and intermediary water flush joint may will be a problem that is difficult to avoid, and need to carry out consolidation process to the dam body seepage of this respect.The PVC composite geo-membrane has easy construction in the dam body seepage consolidation process, cost is low, the duration is short, not affected by rainy season and winter, saves engineering quantity, barrier performance is good and can adapts to dam deformation, the advantage such as corrosion-resistant.
Summary of the invention
The technical problems to be solved in the utility model is: for the problem of above-mentioned existence, provide the geomembrane anti-seepage structure of the concrete dam upstream face of a kind of reduced investment, easy construction, to solve the seepage of dam problem.
The technical scheme that the utility model adopts is: a kind of geomembrane anti-seepage structure of concrete dam upstream face, it is characterized in that: the concrete dam upstream face is laid draining geonet and PVC composite geo-membrane successively, the PVC composite geo-membrane is anchored on the dam facing through anchoring mechanism and peripheral anchoring Water stop mechanism, described draining geonet 4 and the space that is produced by anchoring mechanism between PVC composite geo-membrane and dam facing form drainage system, and this drainage system bottom connects gutter.
Described anchoring mechanism is divided into anchoring mechanism waterborne and anchoring mechanism under water take the normal reserve-water-level of dam as the boundary;
Described anchoring mechanism waterborne comprises U-shaped inner jacket member and Ω shape casing component, wherein inner jacket member U-shaped mouth outwardly, the above covers described PVC composite geo-membrane, described casing component covers on the PVC composite geo-membrane, and be anchored on the dam facing casing component surface coverage light face geomembrane through crab-bolt with inner jacket member;
Described anchoring mechanism under water is that two adjacent PVC composite geo-membranes connect with mechanical anchor, this under water anchoring mechanism have the grooved shell, the shell notch inwardly and be fixed on the dam facing, grooved case surface lamination covers adjacent PVC composite geo-membrane, PVC composite geo-membrane lamination place is pressed with the stainless steel packing ring, and this stainless steel packing ring is fixed through screw bolt and nut and grooved shell.
Described peripheral anchoring Water stop mechanism is comprised of stainless steel press strip, gasket seal, fish plate and anchor pole, wherein the stainless steel press strip is pressed on PVC composite geo-membrane marginal surface, gasket seal and fish plate are padded between PVC composite geo-membrane and the dam facing, the three through anchor rod anchored on dam facing.
The beneficial effects of the utility model are: the utility model adopts different anchor structures for water level varying environment up and down to geomembrane, guarantees that geomembrane is stable, guarantees that geomembrane is smooth; The utility model can be in the situation of not emptying reservoir carry out antiseepage to the upstream dam facing to be processed, and exploitativeness, reliability are all better, and reduced investment, easy construction, efficiently solves the seepage of dam problem, the each side remarkable benefit.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of anchoring mechanism waterborne in the utility model.
Fig. 3 is the structural representation of anchoring mechanism under water in the utility model.
The specific embodiment
As shown in Figure 1, present embodiment is called in person from the dam crest to the dam at the upstream of concrete dam 1 dam facing a continuous impervious PVC composite geo-membrane 3 is set, and geomembrane and the dam foundation join, and PVC composite geo-membrane 3 is inboard with one deck draining geonet 4.PVC composite geo-membrane 3 is anchored in the concrete dam facing through anchoring mechanism in this example, and this anchoring mechanism is divided into anchoring mechanism waterborne and anchoring mechanism under water take the normal reserve-water-level of dam as the boundary.
More than the water level, adjacent PVC composite geo-membrane 3 gets up by the vertical thermal solder bond.Be fixed on PVC composite geo-membrane 3 on the dam facing and through anchoring mechanism anchoring waterborne taking to fill up the fusion welding mode more than the water level in this example.As shown in Figure 2, anchoring mechanism waterborne comprises the inner jacket member 5 of " U " shape and the casing component 6 of " Ω " shape, PVC composite geo-membrane 3 is expanded in the U-lag, Ω shape casing component 6 is placed on the PVC composite geo-membrane, and be fastened on the inner jacket member 5, inner jacket member 5 is anchored on the dam facing through crab-bolt 7, and casing component is used for fastening PVC composite geo-membrane 3, reaches the purpose of anchoring and tensioning composite geo-membrane.Casing component 6 is directly installed on original exposed surface, center distance 3 ~ 4m.PVC composite geo-membrane 3 punches by spacing and the diameter of crab-bolt 7, and is fastened on the U-shaped inner jacket member with Ω shape casing component.The light face geomembrane 8 of inner jacket member 5 and the thick 2.5mm of casing component 6 usefulness covers, and with hot weld light face geomembrane 8 is welded on and carries out antiseepage on the PVC composite geo-membrane 3.The welding of all PVC composite geo-membranes 3 and light face geomembrane 8 all makes by hand, and the single track heating solder iron adopts " heat air method " to carry out.
Below the water level, because the vertical thermal welding can't carry out, must rely on mechanical anchor so geomembrane is installed under water in water, adjacent geomembrane directly connects by mechanical anchor, and the overlap joint between the geomembrane is closed.As shown in Figure 3, adopt under water anchoring mechanism with 3 anchor connections of PVC composite geo-membrane in the present embodiment, anchoring mechanism is located at two PVC composite geo-membranes, 3 adjacent positions under water, with two geomembrane anchorings and connection, this under water anchoring mechanism have grooved shell 9, this shell notch inwardly and be fixed on the dam facing, grooved shell 9 surperficial laminations cover two adjacent PVC composite geo-membranes 3, PVC composite geo-membrane 3 lamination places are pressed with ethylene-propylene-diene monomer glue gasket 12 and stainless steel packing ring 10, and this stainless steel packing ring is fixing through bolt, nut and spring shim and grooved shell 9.In this example between grooved shell and the geomembrane, between geomembrane and the geomembrane, all be lined with rubber sheet gasket between geomembrane and the ethylene-propylene-diene monomer glue gasket 12.
At PVC composite geo-membrane 3 peripheries peripheral anchoring Water stop mechanism is set, infiltrates PVC composite geo-membrane 3 to avoid water.This periphery anchoring Water stop mechanism is comprised of stainless steel press strip 2, gasket seal, fish plate and anchor pole, between stainless steel press strip 2 and the fish plate, PVC composite geo-membrane and gasket seal pad force together, and anchor in the concrete structure with anchor pole: as at the stabilizing concrete supporting bed, use short anchor; If the dam surface is damaged, in concrete dam body, with long anchor.Anchor pole type and spacing should determine that according to the tensile test on the existing supporting bed general anchor pole is spaced apart 15cm, and diameter is 12mm, and length is greater than 10cm.Anchor pole both can be mechanical expansion anchor pole or chemical anchor pole (epoxy resin extruding).
Periphery anchoring Water stop mechanism is according to installation environment (waterborne and under water), and the type of anchor pole, gasket seal and stainless steel press strip 2 etc. is understood different.General low water head or when being higher than 50m, peripheral anchoring Water stop mechanism adopts (wide * thick=60 * 6mm) or (the stainless steel press strip of wide * thick=80 * 8mm); The peripheral sealing of dam crest, (the plane stainless steel press strip of wide * thick=30 * 3mm) is made, and only needs the infiltration of opposing rainwater and stormy waves by specification.
When anchor pole penetrates PVC composite geo-membrane 3, antiseepage permeable.The anchor pole head can be used the coverings such as mastic, synthetic resin, and perhaps band shape or the sticking patch with the same synthetic materials of geomembrane covers on the anchor rod system, then is thermally welded to geomembrane.
Draining geonet 4 reaches the space that is produced by anchoring mechanism and forms continuous drainage system in the present embodiment between PVC composite geo-membrane 3 and dam facing, and this drainage system bottom connects gutter 11.Vertical concrete dam facing is conducive to flowing of percolating water, and water flows freely in drainage system, is pooled to bottom discharge pipe 11 and discharges through gutter under Action of Gravity Field.Gutter 11 is installed in gallery to the boring of upstream face, in the front of each root gutter a corrosion resistant plate can be installed all, avoids the pipeline under the relevant water source of composite geo-membrane obstruction.Draining enters inspection gallery, enters the collecting well that is equipped with water pump by pipeline, perhaps directly arrives the downstream.
PVC composite geo-membrane 3 material selections in this example: dam height h＜40 m, PVC composite geo-membrane 3 are thermally bonded in 200g/mm for thick 2mm geomembrane
2Geotextiles; Dam height h〉40m, PVC composite geo-membrane 3 is thermally bonded in 500g/mm for thick 2.5mm geomembrane
2Geotextiles.
All inner jacket member 5, casing component 6, crab-bolt 7, grooved shell 9, bolt, nut, anchor pole etc. must have corrosion resistance in the present embodiment, solvable chemical substance or other cement products in the energy Chinese People's Anti-Japanese Military and Political College dam concrete, and other corrosion in the reservoir, can select stainless steel material to make.
The concrete construction method of present embodiment enters lower:
A, according to the grade of engineering, the factors such as friction factor, engineering exhaust and construction costs of dam height, the retaining degree of depth, geological conditions, transmission coefficient, storeroom have been considered, select PVC composite geo-membrane 3 materials, and become 6m wide wide PVC composite geo-membrane 3 welding productions of the 2.10m of standard specification in factory or in the ward.
B, the PVC composite geo-membrane that 6m is wide are transported to the dam crest that needs stabilization works; Install to adopt the platform of hoist engine operation, from dam crest, fall coiled material along dam crest, the staff pontoon (be suspended on dam crest, be can lifting working platform) on take to fill up the fusion welding mode and weld the PVC composite geo-membrane.
C, the wide PVC composite geo-membrane of prefabricated 6m is sling with pontoon, then with stainless steel press strip 2 worker's film is fixed on the dam top, be down in the water again, geomembrane is correctly located and is fastened on by the diver under water on the dam facing under water.
D, the bore template that presets is in place after the hole drill of anchoring mechanism and peripheral sealing Water stop mechanism bores, can remove bore template, at this moment the PVC composite geo-membrane is placed on correct position, and anchoring mechanism is installed, and tension PVC composite geo-membrane.Adopt at last anchor pole, gasket seal and stainless steel press strip 2 to carry out peripheral sealing.
Claims (3)
1. the geomembrane anti-seepage structure of a concrete dam upstream face, it is characterized in that: concrete dam (1) upstream face is laid draining geonet (4) and PVC composite geo-membrane (3) successively, PVC composite geo-membrane (3) is anchored on the dam facing through anchoring mechanism and peripheral anchoring Water stop mechanism, described draining geonet (4) and be positioned at the space that is produced by anchoring mechanism between PVC composite geo-membrane (3) and the dam facing and form drainage system, this drainage system bottom connects gutter (11).
2. the geomembrane anti-seepage structure of concrete dam upstream face according to claim 1 is characterized in that: described anchoring mechanism is divided into anchoring mechanism waterborne and anchoring mechanism under water take the normal reserve-water-level of dam as the boundary;
Described anchoring mechanism waterborne comprises U-shaped inner jacket member (5) and Ω shape casing component (6), wherein inner jacket member (5) U-shaped mouth outwardly, the above covers described PVC composite geo-membrane (3), described casing component (6) covers on the PVC composite geo-membrane (3), and be anchored on the dam facing casing component (6) surface coverage light face geomembrane (8) through crab-bolt (7) with inner jacket member (5);
Described anchoring mechanism under water is that two adjacent PVC composite geo-membranes (3) connect with mechanical anchor, this under water anchoring mechanism have grooved shell (9), the shell notch inwardly and be fixed on the dam facing, the surperficial lamination of grooved shell (9) covers adjacent PVC composite geo-membrane (3), PVC composite geo-membrane (3) lamination place is pressed with stainless steel packing ring (10), and this stainless steel packing ring is fixing through screw bolt and nut and grooved shell (9).
3. the geomembrane anti-seepage structure of concrete dam upstream face according to claim 1 and 2, it is characterized in that: described peripheral anchoring Water stop mechanism is comprised of stainless steel press strip (2), gasket seal, fish plate and anchor pole, wherein stainless steel press strip (2) is pressed on PVC composite geo-membrane (3) marginal surface, gasket seal and fish plate are padded between PVC composite geo-membrane (3) and the dam facing, the three through anchor rod anchored on dam facing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220484669.9U CN202830882U (en) | 2012-09-21 | 2012-09-21 | Geomembrane impervious structure on concrete dam upstream surface |
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| CN201220484669.9U CN202830882U (en) | 2012-09-21 | 2012-09-21 | Geomembrane impervious structure on concrete dam upstream surface |
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| CN202830882U true CN202830882U (en) | 2013-03-27 |
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| CN201220484669.9U Expired - Lifetime CN202830882U (en) | 2012-09-21 | 2012-09-21 | Geomembrane impervious structure on concrete dam upstream surface |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243681A (en) * | 2013-05-16 | 2013-08-14 | 黄河勘测规划设计有限公司 | Flexible connection method for geomembrane for earth and rockfill dam seepage proofing and concrete building |
| CN106090353A (en) * | 2016-06-22 | 2016-11-09 | 北京良乡蓝鑫水利工程设计有限公司 | Fish mouth type exhaust outlet device and be provided with the water body seepage control system of this device |
| CN109555085A (en) * | 2019-01-17 | 2019-04-02 | 中国电建集团华东勘测设计研究院有限公司 | Gravity dam upstream face geomembrane anti-seepage discharge structure and its construction method |
| CN109881957A (en) * | 2019-04-04 | 2019-06-14 | 北京高能时代环境技术股份有限公司 | A kind of sealing structure between metal plate and anti-seepage geomembrane |
| CN110273404A (en) * | 2019-06-20 | 2019-09-24 | 中国水利水电第四工程局有限公司 | A kind of dam face slab surface anti-seepage reinforcement construction technology |
| 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 |
-
2012
- 2012-09-21 CN CN201220484669.9U patent/CN202830882U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243681A (en) * | 2013-05-16 | 2013-08-14 | 黄河勘测规划设计有限公司 | Flexible connection method for geomembrane for earth and rockfill dam seepage proofing and concrete building |
| CN106090353A (en) * | 2016-06-22 | 2016-11-09 | 北京良乡蓝鑫水利工程设计有限公司 | Fish mouth type exhaust outlet device and be provided with the water body seepage control system of this device |
| CN109555085A (en) * | 2019-01-17 | 2019-04-02 | 中国电建集团华东勘测设计研究院有限公司 | Gravity dam upstream face geomembrane anti-seepage discharge structure and its construction method |
| CN109555085B (en) * | 2019-01-17 | 2023-12-01 | 中国电建集团华东勘测设计研究院有限公司 | Geomembrane seepage-proofing drainage structure on upstream face of gravity dam and construction method thereof |
| CN109881957A (en) * | 2019-04-04 | 2019-06-14 | 北京高能时代环境技术股份有限公司 | A kind of sealing structure between metal plate and anti-seepage geomembrane |
| CN109881957B (en) * | 2019-04-04 | 2024-04-05 | 中国科学院高能物理研究所 | Sealing structure between metal plate and impermeable geomembrane |
| CN110273404A (en) * | 2019-06-20 | 2019-09-24 | 中国水利水电第四工程局有限公司 | A kind of dam face slab surface anti-seepage reinforcement construction technology |
| 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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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20130327 |