CN210482215U - Anti-seepage drainage and exhaust structure suitable for flat reservoir basin - Google Patents
Anti-seepage drainage and exhaust structure suitable for flat reservoir basin Download PDFInfo
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- CN210482215U CN210482215U CN201921176566.4U CN201921176566U CN210482215U CN 210482215 U CN210482215 U CN 210482215U CN 201921176566 U CN201921176566 U CN 201921176566U CN 210482215 U CN210482215 U CN 210482215U
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Abstract
The utility model discloses an anti-seepage drainage and exhaust structure suitable for a flat reservoir basin, which comprises a capillary water permeable and drainage belt, a composite geomembrane, a geotextile and a fine-grained soil stone protective layer which are sequentially laid on a flat compact original soil layer of the reservoir basin from bottom to top; the capillary permeable and drainage belt is made of PVC soft plastic; a plurality of capillary water guide holes are formed in the capillary water permeable and drainage belt along the length direction, a water absorption groove is formed in the surface of one side of the capillary water permeable and drainage belt corresponding to the center line of each capillary water guide hole along the length direction, the width of each water absorption groove is smaller than the diameter of each capillary water guide hole, and the notches of the water absorption grooves of the adjacent laid capillary water permeable and drainage belts face to opposite directions; the composite geomembrane is laid with the membrane surface facing upwards and the cloth surface facing downwards. The utility model discloses the advantage lies in satisfying under the condition of engineering requirement, saves a large amount of sand and soil, and the construction is swift, and is with low costs, and drainage under the membrane, exhaust quality are guaranteed. The method can be used for reservoir seepage prevention, channel seepage prevention, landfill seepage prevention engineering and the like of the pumped storage power station.
Description
Technical Field
The utility model relates to a horizontal reservoir basin seepage prevention structure especially relates to the prevention of seepage drainage exhaust structure who is suitable for horizontal reservoir basin.
Background
At present, an anti-seepage structure adopted by a reservoir basin of a plain reservoir is mostly composed of a lower supporting layer, a middle geomembrane anti-seepage layer and an upper protective layer. The support layer is used for homogenizing stress and discharging seepage water under the geomembrane impermeable layer, and according to the technical specification of geomembrane impermeable in hydropower engineering NB/T35027-. However, for plain reservoirs, the reservoir basin area is generally large, such as in the Xinjiang Kaishi drinking water safety reservoir project, the reservoir basin area reaches 100 ten thousand square meters, and thus the quantity of sand required for laying a permeable sand cushion layer with the thickness of 20-40cm is as much as 30 ten thousand cubic meters. The stock yard is hard to find, the transport capacity is large, the transport distance is far, the method is not economical and the construction period is long.
Disclosure of Invention
An object of the utility model is to provide a be suitable for prevention of seepage drainage exhaust structure of flat raw water storehouse basin.
In order to achieve the above purpose, the utility model adopts the following technical proposal:
the anti-seepage drainage and exhaust structure suitable for the flat reservoir basin comprises a capillary permeable drainage belt, a composite geomembrane, geotextile and a fine-grained soil and stone protective layer which are sequentially laid on a flat compact original soil layer of the reservoir basin from bottom to top; the capillary water permeating and draining belt is made of PVC soft plastic; a plurality of capillary water guide holes are formed in the capillary water permeable and drainage belt along the length direction, a water absorption groove is formed in the surface of one side of the capillary water permeable and drainage belt, corresponding to the center line of each capillary water guide hole, along the length direction, the width of each water absorption groove is smaller than the diameter of each capillary water guide hole, and the notches of the water absorption grooves of the adjacent laid capillary water permeable and drainage belts face to opposite directions; the composite geomembrane is laid with the membrane surface facing upwards and the cloth surface facing downwards.
The width of the capillary water permeating and draining belt is 20cm, and the thickness of the capillary water permeating and draining belt is 2 mm; the diameter of the capillary water guide hole is 1 mm; the width of the water absorption groove is 0.3 mm; the center line distance between the adjacent capillary water guide holes is 1.5 mm.
The utility model discloses the advantage lies in satisfying under the condition of engineering requirement, can save a large amount of sand and soil, and the construction is swift, and is with low costs, and drainage under the membrane, exhaust quality are guaranteed. The method can be used for reservoir seepage prevention, channel seepage prevention, landfill seepage prevention engineering and the like of the pumped storage power station.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the capillary permeable and draining belt of the present invention.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1 and 2, be suitable for prevention of seepage drainage exhaust structure of flat reservoir basin, including laying capillary drainage strip 2, compound geomembrane 3, geotechnological cloth 4, fine grained soil building stones protective layer 5 on the level closely knit original state soil layer 1 of reservoir basin from bottom to top in proper order, capillary drainage strip 2 is passed through and is made by PVC soft plastics.
As shown in FIG. 2, the capillary water permeable and draining belt 2 has a width of 20cm and a thickness of 2 mm; a plurality of capillary water guide holes 6 are formed in the capillary water permeable and drainage belt 2 along the length direction, a water absorption groove 7 is formed in the surface of one side of the capillary water permeable and drainage belt 2 corresponding to the central line of each capillary water guide hole 6 along the length direction, the width of each water absorption groove 7 is 0.3mm, the diameter of each capillary water guide hole 6 is 1mm, and the distance between the central lines of the adjacent capillary water guide holes 6 is 1.5 mm.
When the composite geomembrane is laid, the upper and lower sides of the notches of the water absorption grooves 7 of the adjacent capillary permeable and drainage belts 2 are oppositely and alternately laid, and the composite geomembrane 3 is laid with the membrane surface facing upwards and the cloth surface facing downwards.
The utility model discloses the construction procedure as follows:
1. the thickness of the reservoir bottom clear base is 0.5m, bulldozing is adopted by a bulldozer, and a dump truck is loaded by an excavator and transported to a slag yard. The foundation after waste removal is rolled, leveled and compacted, and the dry volume weight of the compacted foundation meets the design requirement;
2. paving the capillary permeable and drainage strips 2, and paving the notches of the water absorption grooves 7 of the adjacent capillary permeable and drainage strips 2 in a staggered manner from top to bottom; at the slope toe of the dam, inserting the two ends of the capillary permeable drainage belt 2 in the length direction into a PVC drainage pipe provided with a slot, and leading the drainage pipe out of the dam;
3. the reservoir basin adopts the composite geomembrane 3 (with the thickness of 0.5 mm) with one cloth and one film for full seepage prevention, the film surface is upward, the quality of the composite geomembrane 3 is convenient to check, and the cloth surface is downward, so that the composite geomembrane is favorable for protecting (the quality defect of the existing composite geomembrane adopting two cloths and one film is not easy to find). The laying quality of the composite geomembrane 3 is the key of success and failure of the engineering, and the joints of the adjacent composite geomembranes 3 are subjected to hot-melt double seam welding to ensure that the joints are impervious and leak-proof;
4. laying a layer of geotextile 4 (200 g/m 2) on the composite geomembrane 3 to protect the composite geomembrane 3;
5. and loosely paving a fine soil stone protective layer 5 with the thickness of 50cm on the geotextile 4.
The utility model discloses prevention of seepage drainage exhaust structure's theory of operation as follows:
the width of the water absorption groove 7 is 0.3mm, which is much narrower than the diameter of 1mm of the capillary water guide hole 6, therefore, fine particles smaller than 0.3mm enter the capillary water guide pipe 6 and can be discharged with water; and fine particles larger than 0.3mm cannot enter the capillary water guide holes 6, namely the capillary water permeable and drainage belt 2 cannot be blocked, and a natural reverse filtering layer can be formed after the soil around the water absorption grooves 7 of the capillary water permeable and drainage belt 2 is stabilized, so that the capillary water permeable and drainage belt 2 has a self-cleaning function, and the purposes of draining, exhausting and preventing blockage are better met.
The notches of the water absorption grooves 7 of the adjacent capillary permeable and drainage belts 2 are alternately laid up from top to bottom, so that the water seepage under the reservoir membrane can enter the capillary water guide pipes 6 from top to bottom, and meanwhile, the underground and external water is reversely sucked into the capillary water guide pipes 6 of the adjacent capillary permeable and drainage belts 2 from bottom to top.
Meanwhile, the arch bridge type structure formed by the capillary water guide pipes 6 effectively disperses the stress distribution caused by water pressure, and can completely replace the traditional supporting structure of a thick-layer sand layer and a sand gravel layer.
Claims (2)
1. The utility model provides a be suitable for prevention of seepage drainage exhaust structure of flat reservoir storehouse basin which characterized in that: the soil-water-retaining and soil-water-retaining composite membrane comprises a capillary water-permeable and water-draining belt, a composite geomembrane, geotextile and a fine-grained soil and stone protective layer which are sequentially laid on a flat and compact undisturbed soil layer of a warehouse basin from bottom to top; the capillary water permeating and draining belt is made of PVC soft plastic; a plurality of capillary water guide holes are formed in the capillary water permeable and drainage belt along the length direction, a water absorption groove is formed in the surface of one side of the capillary water permeable and drainage belt, corresponding to the center line of each capillary water guide hole, along the length direction, the width of each water absorption groove is smaller than the diameter of each capillary water guide hole, and the notches of the water absorption grooves of the adjacent laid capillary water permeable and drainage belts face to opposite directions; the composite geomembrane is laid with the membrane surface facing upwards and the cloth surface facing downwards.
2. The impermeable drainage and venting structure for horizontally disposed reservoir basins of claim 1, wherein: the width of the capillary water permeating and draining belt is 20cm, and the thickness of the capillary water permeating and draining belt is 2 mm; the diameter of the capillary water guide hole is 1 mm; the width of the water absorption groove is 0.3 mm; the center line distance between the adjacent capillary water guide holes is 1.5 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921176566.4U CN210482215U (en) | 2019-07-25 | 2019-07-25 | Anti-seepage drainage and exhaust structure suitable for flat reservoir basin |
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| CN201921176566.4U CN210482215U (en) | 2019-07-25 | 2019-07-25 | Anti-seepage drainage and exhaust structure suitable for flat reservoir basin |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485375A (en) * | 2019-07-25 | 2019-11-22 | 黄河勘测规划设计研究院有限公司 | Antiseepage drainage exhaust structure suitable for Wall in Plain Reservoir library basin |
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2019
- 2019-07-25 CN CN201921176566.4U patent/CN210482215U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485375A (en) * | 2019-07-25 | 2019-11-22 | 黄河勘测规划设计研究院有限公司 | Antiseepage drainage exhaust structure suitable for Wall in Plain Reservoir library basin |
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