CN204385700U - Be applicable to dewatering installation after the film of geomembrane anti-seepage - Google Patents
Be applicable to dewatering installation after the film of geomembrane anti-seepage Download PDFInfo
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- CN204385700U CN204385700U CN201420670997.7U CN201420670997U CN204385700U CN 204385700 U CN204385700 U CN 204385700U CN 201420670997 U CN201420670997 U CN 201420670997U CN 204385700 U CN204385700 U CN 204385700U
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- geomembrane
- film
- dewatering installation
- perforate
- seepage
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Abstract
The utility model relates to and is a kind ofly applicable to dewatering installation after the film of geomembrane anti-seepage, comprise the first geomembrane be arranged on dam body, described first geomembrane is provided with perforate, anti-filter geotextiles is provided with below described perforate, the size of described anti-filter geotextiles is greater than described perforate, is coated with the second geomembrane above described perforate, and the size of described second geomembrane is greater than described perforate, and top is connected with described first geomembrane, described second geomembrane is placed with cover plate.After film of the present utility model, dewatering installation anti-seepage effect is good, and structure is simple, cheap, is with a wide range of applications.
Description
Technical field
The utility model belongs to hydraulic engineering field, is specifically related to a kind ofly be applicable to dewatering installation after the film of geomembrane anti-seepage.
Background technology
In general, the seepage treatment principle of existing reservoir is " upper stifled lower row "." upper stifled " measure can be divided into three major types: horizontal leakage preventing, upstream batter slope are prevented blending dam body vertical seepage control.Horizontal leakage preventing comprises clay water tiling lid and throws soil etc. under water; The antiseepage of upstream batter slope comprises clay and pastes slope, domatic steel fibre reinforced concrete antiseepage etc.; Vertical seepage control comprises dam grouting, concrete cut, high pressure vectored injection board wall, clay cut-off wall, dam crest are slotted and lay the upright antiseepage of geomembrane etc.The construction investment of these anti-seepage schemes is larger, Comparatively speaking, geomembrane anti-seepage technology have that cost is low, construction technology is simple, equipment is few, speed of application is fast, barrier performance is good and can adapt to dam deformation, corrosion-resistant, be not afraid of the advantage such as mouse, termite destruction, therefore, over nearly 60 years, geomembrane coils in the dissimilar hydraulic engineering of tens thousand of seats such as antiseepage, construction cofferdam, dyke and flood-fighting obtain extensive use in the anti-seepage of channels, dangerously weak reseroirs anti-seepage reinforcing, storehouse.
Geomembrane has high water resistant antiseepage function (osmotic coefficient k≤1 × 10
-10cm/s) geosynthetics, adopt dam slope to lay geomembrane anti-seepage and invest less, anti-seepage effect is good, but in osmotic coefficient k≤1 × 10
-4the homogeneous earth dam of cm/s or once carried out in the earth dam of consolidation by grouting; when adopting dam slope to lay geomembrane anti-seepage scheme; the problem of percolating water draining difficulty, can cause film bulging even to burst the danger causing bank protection unstability and impermeable failure thus when Drawdown of Reservoir Water Level under usually there will be geomembrane film or after film.Just because of this, the application of geomembrane in Earth dam arti-seepage is seriously constrained.
According to the related specifications of geomembrane anti-seepage engineering, generally adopt two kinds of methods to solve, the first adopts on film to add a cover heavy method, and this method is simple, but one side adds bank protection investment, masks the hidden danger that geomembrane bursts on the other hand; Another kind is the device arranging drainage pipe or adopt a kind of similar " non retern valve " structure.Drainage pipe effect is better, but cloth to be set up construction investment larger.And facts have proved that non retern valve cost is high, long-term effect is not good enough yet.
Therefore, in the urgent need to seeking water discharge method after a kind of simple, safe economically viable film again.
Utility model content
In order to solve above technical problem, the purpose of this utility model is to provide dewatering installation after the film that a kind of structure is simple, antiseepage drainage effect is good, and after this film, dewatering installation is applicable to geomembrane anti-seepage.
The technical solution of the utility model is as follows:
A kind ofly be applicable to dewatering installation after the film of geomembrane anti-seepage, comprise the first geomembrane be arranged on dam body, described first geomembrane is provided with perforate, anti-filter geotextiles is provided with below described perforate, the size of described anti-filter geotextiles is greater than described perforate, is coated with the second geomembrane above described perforate, and the size of described second geomembrane is greater than described perforate, and top is connected with described first geomembrane, described second geomembrane is placed with cover plate.
According to dewatering installation after film of the present utility model, preferably, described second geomembrane is composite geo-membrane, and more preferably, described composite geo-membrane is two cloth one films.
According to dewatering installation after film of the present utility model, preferably, the top of described second geomembrane is connected with described first geomembrane by welding.
According to dewatering installation after film of the present utility model, preferably, the bottom of described second geomembrane is not connected with described first geomembrane with dual-side.
According to dewatering installation after film of the present utility model, preferably, described cover plate is concrete precast block cover plate.
According to dewatering installation after film of the present utility model, preferably, after described film, dewatering installation is arranged at dam scarp slope.
According to dewatering installation after film of the present utility model, preferably, after described film, dewatering installation is arranged at the position, middle and lower part of dam scarp slope.
According to dewatering installation after film of the present utility model, preferably, described perforate is circular hole.
We find in long-term practical application:
(1) geomembrane connects and the process on geomembrane and peripheral contact border is the critical process of geomembrane anti-seepage technology, but is generally difficult to completely flawless, inevitably there is flaw, thus, seeps water after bringing a certain amount of film;
(2) under dam crest and both sides also have part infiltration to leak out to film along earth dam;
(3) when reservoir level rapid drawdown, in dam body, the part water yield will flow to upstream, along geomembrane following current to dam slope middle and lower reaches position, when dam body is loose or when being laid with horizontal drainage, these infiltrations can be got rid of to dam, but can work as dam body osmotic coefficient k≤1 × 10
-4cm/s or once carried out the earth dam of consolidation by grouting, now, these infiltrations are just gathered under the film of position, scarp slope middle and lower part, dam, and occur the problem of geomembrane bulging.If time now containing a small amount of gas, the impact of bulging can be larger.
(4) can crack slope protection concrete after geomembrane bulging, as repaired not in time after geomembrane bursts, the overall anti-seepage effect of geomembrane is just subject to serious impact.
Analyze through comprehensive, the utility model have employed the method for draining after film, and normal condition lower cover (preferred concrete precast block cover plate) is pushed down the second geomembrane and covered perforate, and antiseepage first geomembrane is close to, and makes the shipwreck of outside to enter dam body; When film launching stress is higher than on film during external water pressure, the second geomembrane, under hydraulic pressure effect, is opened with seamless way, and under film, infiltration and gas are discharged.
After film of the present utility model, dewatering installation is particularly useful for solving osmotic coefficient k≤1 × 10
-4the homogeneous earth dam of cm/s or once carried out in the earth dam of consolidation by grouting, adopts dam slope to lay drainage problem after the film of geomembrane anti-seepage scheme.
Compared with prior art, after film of the present utility model, dewatering installation structure is simple, and antiseepage drainage effect is good, safe and convenient to use, with low cost.
Accompanying drawing explanation
Fig. 1 is that after film of the present utility model, dewatering installation is arranged on the position view on dam.
Fig. 2 is the structural representation of dewatering installation after film of the present utility model.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the technical solution of the utility model is described in further detail, but the utility model is not limited to following examples.
As depicted in figs. 1 and 2, the utility model will be described in conjunction with practical situations, of the present utility model be applicable to the film of geomembrane anti-seepage after dewatering installation 10 be usually arranged on dam body, (seep water and often gather under the film of position, scarp slope middle and lower part, dam, as shown in Figure 1) in the position, middle and lower part being particularly arranged at dam scarp slope.According to actual needs, after film of the present utility model, dewatering installation 10 can adopt multiple coupling, improves anti-seepage effect.
After film of the present utility model, dewatering installation 10 comprises the first geomembrane 2, first geomembrane 2 and is arranged on dam body 3, and this first geomembrane 2 can be any geomembrane being applicable to seepage by geo-textile field.First geomembrane 2 is provided with perforate 4, anti-filter geotextiles 5 is provided with in the below of perforate 4, the size of anti-filter geotextiles 5 is greater than perforate 4, the top of perforate 4 is coated with the second geomembrane 6, the size of this second geomembrane 6 is greater than perforate 4, and the top of the second geomembrane 6 (one end that namely horizontal level is higher) is connected with the first geomembrane 2, thus form openable gate-shaped structure.When film launching stress is higher than on film during external water pressure, the second geomembrane, under hydraulic pressure effect, is opened with seamless way, and under film, infiltration and gas are discharged.
Preferably, the bottom of the second geomembrane is not connected with described first geomembrane with dual-side, and the top of the second geomembrane 6 is connected with the first geomembrane 2 by welding.Preferably, described second geomembrane is composite geo-membrane, more preferably, described composite geo-membrane is that two cloth one films are (a kind of using plastic sheeting as antiseepage base material, with non-woven fabric compounded seepage by geo-textile material, structure is outer is geotextiles, and centre is antiseepage film).
Second geomembrane 6 is also placed with cover plate 7, and cover plate 7 is due to own wt under normal circumstances, pushes down the second geomembrane 6, makes it cover perforate 4, and the first geomembrane 2 being laid on antiseepage on dam body is close to, and makes the shipwreck of outside to enter dam body.Cover plate 7 can be preferably concrete precast block cover plate.
Under normal circumstances, dam body 3 is equipped with geomembrane, geomembrane re-lays bank protection body 1, when applying dewatering installation 10 after film of the present utility model, because the first geomembrane 2 has perforate 4 and cover plate, then preferably correspondingly on bank protection body 1 reserve the hole position slightly larger than cover plate 7, make bank protection body 1 and cover plate 7 remain with suitable space, be beneficial to moisture or gas is discharged.
As one preferred embodiment, perforate 4 is circular hole, and diameter is 10cm, and the size of the second geomembrane 6 is 30cm × 30cm, and the size of cover plate is 40cm × 40cm, and position, the hole size on bank protection body 1 is 45cm × 45cm.
After film of the present utility model, dewatering installation is particularly useful for solving osmotic coefficient k≤1 × 10
-4the homogeneous earth dam of cm/s or once carried out in the earth dam of consolidation by grouting, adopts dam slope to lay drainage problem after the film of geomembrane anti-seepage scheme.
Practical application effect shows, after film of the present utility model, dewatering installation anti-seepage effect is good, and structure is simple, cheap, is with a wide range of applications.
Claims (9)
1. one kind is applicable to dewatering installation after the film of geomembrane anti-seepage, comprise the first geomembrane be arranged on dam body, it is characterized in that: described first geomembrane is provided with perforate, anti-filter geotextiles is provided with below described perforate, the size of described anti-filter geotextiles is greater than described perforate, is coated with the second geomembrane above described perforate, and the size of described second geomembrane is greater than described perforate, and top is connected with described first geomembrane, described second geomembrane is placed with cover plate.
2. dewatering installation after film according to claim 1, is characterized in that: described second geomembrane is composite geo-membrane.
3. dewatering installation after film according to claim 2, is characterized in that: described composite geo-membrane is two cloth one films.
4. dewatering installation after film according to claim 1, is characterized in that: the top of described second geomembrane is connected with described first geomembrane by welding.
5. dewatering installation after film according to claim 1, is characterized in that: the bottom of described second geomembrane is not connected with described first geomembrane with dual-side.
6. dewatering installation after film according to claim 1, is characterized in that: described cover plate is concrete precast block cover plate.
7. dewatering installation after film according to claim 1, is characterized in that: after described film, dewatering installation is arranged at dam scarp slope.
8. dewatering installation after film according to claim 1, is characterized in that: after described film, dewatering installation is arranged at the position, middle and lower part of dam scarp slope.
9. dewatering installation after film according to claim 1, is characterized in that: described perforate is circular hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420670997.7U CN204385700U (en) | 2014-11-11 | 2014-11-11 | Be applicable to dewatering installation after the film of geomembrane anti-seepage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420670997.7U CN204385700U (en) | 2014-11-11 | 2014-11-11 | Be applicable to dewatering installation after the film of geomembrane anti-seepage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204385700U true CN204385700U (en) | 2015-06-10 |
Family
ID=53358433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420670997.7U Withdrawn - After Issue CN204385700U (en) | 2014-11-11 | 2014-11-11 | Be applicable to dewatering installation after the film of geomembrane anti-seepage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204385700U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389298A (en) * | 2014-11-11 | 2015-03-04 | 广东省水利水电科学研究院 | Behind-membrane draining device and method suitable for geomembrane seepage prevention |
-
2014
- 2014-11-11 CN CN201420670997.7U patent/CN204385700U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389298A (en) * | 2014-11-11 | 2015-03-04 | 广东省水利水电科学研究院 | Behind-membrane draining device and method suitable for geomembrane seepage prevention |
| CN104389298B (en) * | 2014-11-11 | 2016-05-25 | 广东省水利水电科学研究院 | Be applicable to drainage arrangement after the film of geomembrane anti-seepage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150610 Effective date of abandoning: 20160525 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |