CN217460465U - Double-layer bentonite waterproof blanket seepage prevention structure for dam body seepage prevention - Google Patents
Double-layer bentonite waterproof blanket seepage prevention structure for dam body seepage prevention Download PDFInfo
- Publication number
- CN217460465U CN217460465U CN202221033080.7U CN202221033080U CN217460465U CN 217460465 U CN217460465 U CN 217460465U CN 202221033080 U CN202221033080 U CN 202221033080U CN 217460465 U CN217460465 U CN 217460465U
- Authority
- CN
- China
- Prior art keywords
- seepage
- dam
- waterproof blanket
- layer
- bentonite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910000278 bentonite Inorganic materials 0.000 title claims abstract description 81
- 239000000440 bentonite Substances 0.000 title claims abstract description 81
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 230000002265 prevention Effects 0.000 title claims abstract description 41
- 239000004576 sand Substances 0.000 claims abstract description 7
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 229940092782 bentonite Drugs 0.000 claims description 74
- 239000010410 layer Substances 0.000 claims description 55
- 239000004745 nonwoven fabric Substances 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 9
- 239000004746 geotextile Substances 0.000 claims description 9
- 239000011241 protective layer Substances 0.000 claims description 9
- 230000008093 supporting effect Effects 0.000 claims description 9
- 229920006254 polymer film Polymers 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 229920006262 high density polyethylene film Polymers 0.000 claims description 4
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 229940080314 sodium bentonite Drugs 0.000 claims description 3
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 9
- 238000010276 construction Methods 0.000 description 13
- 238000005457 optimization Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 238000004078 waterproofing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- -1 support bed course Substances 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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- Revetment (AREA)
Abstract
The utility model provides a double-deck bentonite water blanket seepage prevention structure for dam body prevention of seepage, is including laying basic holding power layer, support bed course, bentonite waterproof blanket layer and the inoxidizing coating on earth dam or rock-fill dam or bank in proper order, basic holding power layer is graded rubble inverted filter, support the bed course and be the coarse sand, bentonite waterproof blanket layer includes two-layer bentonite water blanket and sets up the sand-free concrete slab in the middle of two-layer bentonite water blanket, the inoxidizing coating is the rock-fill. The utility model provides the high prevention of seepage effect reduces the destroyed probability of bentonite waterproof blanket.
Description
Technical Field
The utility model relates to a hydraulic engineering technical field, concretely relates to a double-deck bentonite waterproof blanket seepage prevention structure for dam body prevention of seepage.
Background
In the construction of water conservancy and hydropower engineering, an anti-seepage structure of an earth dam, a rock-fill dam, a bank and the like is an important part. The bentonite waterproof blanket is mainly used for seepage prevention or sealing in civil engineering, hydraulic engineering and environmental protection engineering, such as seepage prevention design of channels, reservoirs and dams. However, in the traditional construction, a single-layer bentonite waterproof blanket is generally adopted to form an anti-seepage body of an earth dam, a rock-fill dam, a bank and the like, and the anti-seepage effect is poor. Moreover, bentonite waterproof blankets are generally fragile and easy to damage, and once damaged, the seepage-proofing effect of the seepage-proofing structure of an earth dam or a rock-fill dam or a bank is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the technical problem, provide a double-deck bentonite waterproof blanket seepage prevention structure for dam body prevention of seepage, improve prevention of seepage effect, reduce the destroyed probability of bentonite waterproof blanket.
The utility model provides a solve above-mentioned technical problem, the technical scheme who provides is: the utility model provides a double-deck bentonite water blanket seepage prevention structure for dam body prevention of seepage, is including laying basic holding power layer, support bed course, bentonite waterproof blanket layer and the inoxidizing coating on earth dam or rock-fill dam or bank in proper order, basic holding power layer is graded rubble inverted filter, support the bed course and be the coarse sand, bentonite waterproof blanket layer includes two-layer bentonite water blanket and sets up the sand-free concrete slab in the middle of two-layer bentonite water blanket, the inoxidizing coating is the rock-fill.
As the utility model relates to a further optimization of double-deck bentonite waterproof blanket seepage prevention structure for dam body prevention of seepage: the thickness of the protective layer is 13cm-40 cm.
As the utility model relates to a further optimization of double-deck bentonite waterproof blanket seepage prevention structure for dam body prevention of seepage: the thickness of the sand-free concrete slab is 8cm-15 cm.
As the utility model relates to a further optimization of double-deck bentonite waterproof blanket seepage prevention structure for dam body prevention of seepage: the thickness of the base support layer is not less than 50 cm.
As the utility model relates to a further optimization of double-deck bentonite waterproof blanket seepage prevention structure for dam body prevention of seepage: the bentonite waterproof blanket comprises composite geotextile, non-woven fabric and sodium bentonite arranged between the composite geotextile and the non-woven fabric, wherein the outer surface of the non-woven fabric is covered with a polymer film.
As the utility model relates to a further optimization of double-deck bentonite waterproof blanket seepage prevention structure for dam body prevention of seepage: the polymer film is a high-density polyethylene film.
As the utility model relates to a further optimization of double-deck bentonite waterproof blanket seepage prevention structure for dam body prevention of seepage: the bentonite waterproof blanket is fixedly connected by adopting a needle punching method.
As the utility model relates to a further optimization of double-deck bentonite waterproof blanket seepage prevention structure for dam body prevention of seepage: and geogrids are arranged on the outer surfaces of the composite geotextile and the non-woven fabric.
Advantageous effects
The utility model is used for double-deck bentonite water blanket seepage prevention structure of dam body prevention of seepage, simple structure, the structure that adopts double-deck bentonite water blanket improves its prevention of seepage effect greatly, sets up no sand concrete board between the double-deck bentonite, plays the effect of support to the bentonite water blanket on the one hand, and on the other hand can reduce the destroyed possibility of bentonite water blanket. The bentonite waterproof blanket layer can be prefabricated in advance, the construction process is simplified, and the construction time of the anti-seepage structure is saved. And secondly, the polymer film and the geogrid are arranged on the surface of the bentonite waterproof blanket, so that the tear strength of the bentonite waterproof blanket is greatly enhanced.
Drawings
FIG. 1 is a schematic structural diagram of a double-layer bentonite waterproof blanket seepage-proofing structure for dam seepage proofing;
the labels in the figure are: 1. the waterproof layer comprises a protective layer 2, a bentonite waterproof blanket 3, a sand-free concrete plate 4, a supporting cushion layer 5 and a basic supporting layer.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided in connection with the accompanying drawings.
As shown in fig. 1: a double-layer bentonite waterproof blanket 2 seepage-proofing structure comprises a foundation supporting layer 5, a supporting cushion layer 4, a bentonite waterproof blanket layer and a protective layer 1 which are sequentially paved on an earth dam or a rock-fill dam or a bank. After the construction of the main rockfill body is completed on the earth dam or the rock-fill dam or the embankment, firstly, the construction of a foundation support layer 5 is carried out, then, a support cushion layer 4 is laid, secondly, the construction of a bentonite waterproof blanket layer is carried out, and after the construction of the bentonite waterproof blanket layer is finished, the construction of a protective layer 1 is carried out to protect the bentonite waterproof blanket layer.
The basic supporting layer 5 is a graded broken stone reverse filter layer, which is also called a reverse filter bag and refers to a graded broken stone layer with the grain diameter from thin to thick laid at the water inlet of the infiltration canal along the water flow direction. The reverse filtering layer is made of 2-4 layers of sand, gravel or pebble with different particle sizes, the particles are gradually increased along the direction of water flow, the particles of any layer are not allowed to pass through the pores of the adjacent layer, and the particles of the same layer cannot move relatively. After the inverted filter layer is arranged, the seepage water is taken away from the soil in the dam body or the foundation when flowing out, so that piping and soil flowing can be prevented. The design of the reverse filtration layer is selected according to the analysis data of the soil particle composition by using a reverse filtration layer relation curve chart. The thickness of the base support layer 5 is preferably not less than 50 cm. The graded broken stone reverse filter layer is constructed according to the rolling of the grading strictly, the reverse filtering function is ensured, and the mature prior art can be adopted.
The supporting cushion layer 4 is coarse sand, the thickness of the supporting cushion layer 4 can be not less than 8cm, and the supporting and protecting effects on the bentonite waterproof blanket are achieved.
In order to improve the anti-seepage effect, the bentonite waterproof blanket layer comprises two layers of bentonite waterproof blankets 2, a drainage layer is generally arranged between the two layers of bentonite waterproof blankets 2, and a drainage material can be generally added into the drainage layer in order to increase the water permeability of the drainage layer. The bentonite waterproof blanket 2 adopts the novel material sand-free concrete plate 3 for reducing the possibility that the bentonite waterproof blanket 2 is damaged by being pierced by the top because the structure of the bentonite waterproof blanket is fragile. A sand-free concrete plate 3 is arranged between the two layers of the bentonite waterproof blankets 2. The bentonite waterproof blanket layer formed by the two layers of the bentonite waterproof blankets 2 and the sand-free concrete plate 3 arranged between the two layers can be prefabricated in advance, so that the construction process is greatly accelerated, and the construction time of the anti-seepage structure is greatly saved. Wherein, the thickness of the sand-free concrete plate 3 is preferably controlled within 8cm-15cm, and the good permeability of the bentonite waterproof blanket 2 is kept while the two layers of the bentonite waterproof blanket are supported.
The protective layer 1 is laid on the bentonite waterproof blanket 2 far away from the earth dam or rock-fill dam or embankment, the protective layer 1 is rock-fill, the thickness of the protective layer 1 is 13cm-40cm, the bentonite waterproof blanket 2 is prevented from being aged by solar ultraviolet irradiation, the protective layer 1 cannot play a role in protection when the thickness is less than 13cm, and the cost is wasted when the thickness is more than 40 cm.
The bentonite waterproof blanket 2 comprises composite geotextile, non-woven fabric and sodium bentonite arranged between the composite geotextile and the non-woven fabric, and the bentonite waterproof blanket 2 is fixedly connected by adopting a needle punching method. The bentonite waterproofing blanket 2 may be fixed by a plurality of rivets which may be evenly distributed along the length and width directions of the bentonite waterproofing blanket 2, but which may not be used too much so as not to damage the structure of the bentonite waterproofing blanket 2.
The outer surface of the non-woven fabric is covered with a high polymer film, and the high polymer film is a high-density polyethylene film. The waterproof effect of the waterproof blanket 2 of bentonite is improved through the arrangement of the high-density polyethylene film, and the tear strength of the waterproof blanket 2 of bentonite is also improved, so that the waterproof blanket is not easy to damage. In order to strengthen the strength of the bentonite waterproof blanket 2, the outer surfaces of the composite geotextile and the non-woven fabric are provided with the geogrids, so that the bentonite waterproof blanket 2 is protected, the abrasion of the bentonite waterproof blanket 2 is reduced in the construction process, and the construction difficulty is reduced.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description in any form, and although the present invention has been disclosed with the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make some modifications or modifications to equivalent embodiments of the same changes without departing from the technical scope of the present invention, but all the technical matters of the present invention are within the scope of the technical solution of the present invention.
Claims (8)
1. The utility model provides a double-deck bentonite waterproof blanket seepage prevention structure for dam body prevention of seepage which characterized in that: including laying basic holding power layer (5), support bed course (4), the waterproof blanket layer of bentonite and inoxidizing coating (1) on earth dam or rock-fill dam or embankment in proper order, basic holding power layer (5) are graded rubble reversed filter, support bed course (4) are the coarse sand, the waterproof blanket layer of bentonite includes two-layer bentonite waterproof blanket (2) and sets up no sand concrete board (3) in the middle of two-layer bentonite waterproof blanket (2), inoxidizing coating (1) is the rock-fill.
2. The double-layered bentonite waterproof blanket seepage-proofing structure for dam seepage-proofing of a dam body of a dam as claimed in claim 1, wherein: the thickness of the protective layer (1) is 13cm-40 cm.
3. The double-layered bentonite waterproof blanket seepage-proofing structure for dam seepage-proofing of a dam body of a dam as claimed in claim 1, wherein: the thickness of the sand-free concrete plate (3) is 8-15 cm.
4. The double-layered bentonite waterproof blanket seepage-proofing structure for dam seepage-proofing of a dam body as claimed in claim 1, wherein: the thickness of the basic supporting layer (5) is not less than 50 cm.
5. The double-layered bentonite waterproof blanket seepage-proofing structure for dam seepage-proofing of a dam body of a dam as claimed in claim 1, wherein: the bentonite waterproof blanket (2) comprises composite geotextile, non-woven fabric and sodium bentonite arranged between the composite geotextile and the non-woven fabric, and the outer surface of the non-woven fabric is covered with a polymer film.
6. The double-layered bentonite waterproof blanket seepage prevention structure for dam seepage prevention of a dam body as claimed in claim 5, wherein: the polymer film is a high-density polyethylene film.
7. The double-layered bentonite waterproof blanket seepage prevention structure for dam seepage prevention of a dam body as claimed in claim 5, wherein: the bentonite waterproof blanket (2) is fixedly connected by adopting a needle punching method.
8. The double-layered bentonite waterproof blanket seepage prevention structure for dam seepage prevention of a dam body as claimed in claim 5, wherein: and geogrids are arranged on the outer surfaces of the composite geotextile and the non-woven fabric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221033080.7U CN217460465U (en) | 2022-04-29 | 2022-04-29 | Double-layer bentonite waterproof blanket seepage prevention structure for dam body seepage prevention |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221033080.7U CN217460465U (en) | 2022-04-29 | 2022-04-29 | Double-layer bentonite waterproof blanket seepage prevention structure for dam body seepage prevention |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217460465U true CN217460465U (en) | 2022-09-20 |
Family
ID=83273388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221033080.7U Expired - Fee Related CN217460465U (en) | 2022-04-29 | 2022-04-29 | Double-layer bentonite waterproof blanket seepage prevention structure for dam body seepage prevention |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217460465U (en) |
-
2022
- 2022-04-29 CN CN202221033080.7U patent/CN217460465U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220920 |