CN220202718U - Novel anti-seepage reinforcing structure for dam shoulder of inclined wall cofferdam - Google Patents
Novel anti-seepage reinforcing structure for dam shoulder of inclined wall cofferdam Download PDFInfo
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- CN220202718U CN220202718U CN202320257853.8U CN202320257853U CN220202718U CN 220202718 U CN220202718 U CN 220202718U CN 202320257853 U CN202320257853 U CN 202320257853U CN 220202718 U CN220202718 U CN 220202718U
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- seepage
- inclined wall
- proofing
- shoulder
- geomembrane
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 30
- 239000004927 clay Substances 0.000 claims abstract description 32
- 239000002893 slag Substances 0.000 claims abstract description 12
- 239000004575 stone Substances 0.000 claims abstract description 12
- 230000002265 prevention Effects 0.000 claims description 7
- 239000011378 shotcrete Substances 0.000 claims description 6
- 238000005056 compaction Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000005728 strengthening Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 10
- 230000002787 reinforcement Effects 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000008595 infiltration Effects 0.000 abstract description 2
- 238000001764 infiltration Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000004567 concrete Substances 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011798 excavation material Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a novel dam shoulder seepage-proofing reinforcing structure of an inclined wall cofferdam, which comprises a stone slag weir body, an inclined wall seepage-proofing body, a dam shoulder seepage-proofing reinforcing unit and a clay covering body, wherein the inclined wall seepage-proofing body is arranged on the stone slag weir body, the clay covering body is arranged at the toe of the inclined wall seepage-proofing body, and the dam shoulder seepage-proofing reinforcing unit is arranged at two sides of the inclined wall seepage-proofing body. Through the targeted reinforcement design of the seepage-proofing weak area of the contact part of the inclined wall seepage-proofing body and the bank slope bedrock, the seepage diameter can be effectively prolonged, the infiltration is reduced, the cost is low and the construction is convenient.
Description
Technical Field
The utility model belongs to the technical field of construction diversion, and particularly relates to a novel anti-seepage reinforcing structure for a dam shoulder of an inclined wall cofferdam.
Background
The cofferdam is used as a temporary hydraulic building for maintaining the construction of a permanent hydraulic building, and after the foundation pit is drained, dry construction conditions are formed to ensure that the construction of the permanent building is smoothly carried out. The inclined wall cofferdam is used as one of the earth and rock cofferdams, generally, earth materials are used as seepage-proofing structures, stone slag is used as a weir body, excavation materials can be fully utilized, seepage proofing and weir body filling can be synchronously carried out, and foundation pit early pumping construction is facilitated.
As the weakest impermeable area of the inclined wall cofferdam, the impermeable body of the cofferdam and a bank slope should form a closed impermeable system according to the requirements of the design Specification of cofferdam for Water conservancy and hydropower engineering (SL 645-2013), and the impermeable body section of the cofferdam, insertion type or other types can be enlarged, and the permeability coefficient of the earth material of the impermeable body of the earth-rock cofferdam is not more than 1 multiplied by 10 -5 cm/s, the leakage of the cofferdam is often caused by the fact that the contact part of the seepage-proofing body and the shoreside bedrock is difficult to crush and compact, the seepage-proofing soil material has a locally larger permeability coefficient, and the like in actual construction. To ensure the safety of the foundation pit construction after the weir, the cofferdam seepage-proofing body needs to be reinforced, but due to the constructionConditional restrictions, no effective and low cost technology is currently available to quickly address this problem.
Disclosure of Invention
The utility model aims to solve the technical problems in the prior art, and provides a novel anti-seepage reinforcing structure for a dam shoulder of an inclined wall cofferdam, which can effectively prolong the seepage diameter, reduce the bypass seepage, and has low cost and convenient construction through the targeted reinforcing design of an anti-seepage weak area of the contact part of an inclined wall anti-seepage body and a bank slope base rock.
In order to solve the technical problems, the utility model adopts the following technical scheme:
novel inclined wall cofferdam weir shoulder seepage prevention additional strengthening, its characterized in that: the stone slag dam comprises a stone slag dam body, an inclined wall anti-seepage body, a dam shoulder anti-seepage reinforcing unit and a clay covering body, wherein the inclined wall anti-seepage body is arranged on the stone slag dam body, the clay covering body is arranged at the toe of the inclined wall anti-seepage body, and the dam shoulder anti-seepage reinforcing unit is arranged at two sides of the inclined wall anti-seepage body. The anti-seepage system of the inclined wall cofferdam can be improved rapidly and effectively with low cost by carrying out targeted reinforcement design on the anti-seepage weak area of the contact part of the inclined wall anti-seepage body and the bank slope bedrock through the weir shoulder anti-seepage reinforcing unit.
Further, the dam shoulder seepage-proofing reinforcing unit comprises a geomembrane and a clay leveling layer, wherein the clay leveling layer is arranged on the inclined wall seepage-proofing body, and the geomembrane is paved on the clay leveling layer. The setting of clay screed can be convenient for the leveling and the smooth spreading of geomembrane.
Further, the inclined wall seepage prevention body is provided with an inclined wall notch, a bank slope notch is formed in a bank slope bedrock close to the inclined wall seepage prevention body, two sides of the geomembrane are respectively arranged in the inclined wall notch and the bank slope notch, and compaction clay blocks are respectively arranged in the inclined wall notch and the bank slope notch so as to compact the geomembrane. The inclined wall notch and the bank slope notch can be convenient for fixing the two sides of the geomembrane, and the fixing effect is good.
Further, a sprayed concrete layer is arranged on the geomembrane to compress the geomembrane. The geomembrane surface is protected by the sprayed concrete ballast, so that the effects of compaction and protection are achieved.
Further, a folding corner hanging net is arranged at the joint of the bank slope bedrock and the inclined wall seepage-proofing body, and the folding corner hanging net is arranged between the geomembrane and the clay leveling layer. The risk of pulling crack is reduced by hanging the net at the folded corner, and concrete is sprayed again on the outer side of the net at the folded corner for protection.
Further, the geomembrane extends at the toe of the slope, and the clay covering body covers the extending geomembrane, so that the anti-seepage reinforcing units of the bottom of the inclined wall cofferdam and the side weir shoulders form a complete anti-seepage body.
Further, a reverse filtering layer is arranged between the stone slag weir body and the inclined wall seepage-proofing body.
Due to the adoption of the technical scheme, the utility model has the following beneficial effects:
1) Through the targeted reinforcement design of the seepage-proofing weak area of the contact part of the inclined wall seepage-proofing body and the bank slope bedrock, the seepage diameter can be effectively prolonged, and the infiltration is reduced;
2) The dam shoulder seepage-proofing reinforcing structure with the embedded geomembrane and the slope toe clay cover as cores is low in cost and low in construction, and the improvement of a seepage-proofing system of the inclined wall cofferdam can be realized rapidly;
3) The surface sprayed concrete can prevent the geomembrane from being pressed and heavy, and simultaneously can reduce the scouring of rainwater to impermeable soil materials, prolong the seepage diameter and reduce the seepage of the shoreside bedrock cracks.
Drawings
The utility model is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic structural view of a novel dam shoulder seepage-proofing reinforcing structure of an inclined wall cofferdam;
FIG. 2 is a schematic structural view of a barrier-shoulder reinforcement unit according to the present utility model;
FIG. 3 is a schematic view of the structure of the connection between the wall body and the clay cover of the utility model.
In the figure, a 1-ballast weir; 2-an inclined wall seepage-proofing body; 3-a weir shoulder seepage prevention strengthening unit; 4-clay covering body; 5-geomembrane; 6-clay leveling layer; 7-grooving the inclined wall; 8-bank slope grooving; 9-spraying a concrete layer; 10-hanging a net at the folded angle; 11-a reverse filtration layer; 12-bank slope bedrock.
Detailed Description
As shown in fig. 1 to 3, the novel dam shoulder seepage-proofing reinforcing structure of the inclined wall cofferdam comprises a ballast weir body 1, an inclined wall seepage-proofing body 2, a dam shoulder seepage-proofing reinforcing unit 3 and a clay covering body 4, wherein the inclined wall seepage-proofing body 2 is arranged on the ballast weir body 1, the clay covering body 4 is arranged at the toe of the inclined wall seepage-proofing body 2, and the dam shoulder seepage-proofing reinforcing unit 3 is arranged at two sides of the inclined wall seepage-proofing body 2. The anti-seepage system of the inclined wall cofferdam can be improved rapidly and effectively with low cost by carrying out targeted reinforcement design on the anti-seepage weak area of the contact part of the inclined wall anti-seepage body 2 and the bank slope bedrock through the weir shoulder anti-seepage reinforcing unit 3.
The dam shoulder seepage-proofing reinforcing unit 3 comprises a geomembrane 5 and a clay leveling layer 6, wherein the clay leveling layer 6 is arranged on the inclined wall seepage-proofing body, and the geomembrane 5 is paved on the clay leveling layer 6. The provision of the clay leveling layer 6 can facilitate leveling and smooth spreading of the geomembrane 5.
The inclined wall seepage prevention body is provided with an inclined wall notch 7, a bank slope notch 8 is arranged on a bank slope bedrock 12 close to the inclined wall seepage prevention body, two sides of the geomembrane 5 are respectively arranged in the inclined wall notch 7 and the bank slope notch 8, and compaction clay blocks are respectively arranged in the inclined wall notch 7 and the bank slope notch 8 so as to compact the geomembrane 5. The inclined wall notch 7 and the bank slope notch 8 can be convenient for fixing the two sides of the geomembrane 5, and the fixing effect is good.
A sprayed concrete layer 9 is arranged on the geomembrane 5 to compress the geomembrane 5. The surface of the geomembrane 5 is protected by the sprayed concrete weight, so that the effects of compaction and protection are achieved, the scouring of rainwater to impermeable soil materials can be reduced, the seepage diameter can be prolonged, and the seepage of cracks of the shoreside bedrock 12 can be reduced.
The joint of the bank slope bedrock 12 and the inclined wall seepage-proofing body is provided with a folded corner hanging net 10, and the folded corner hanging net 10 is arranged between the geomembrane 5 and the clay leveling layer 6. The risk of pulling crack is reduced by hanging the net 10 at the folding corner, and concrete is sprayed again to protect the outer side of the net 10 at the folding corner.
The geomembrane 5 extends at the toe of the slope, and the clay covering body 4 covers the extending geomembrane 5, so that the bottom of the inclined wall cofferdam and the side weir shoulder anti-seepage reinforcing unit 3 form a complete anti-seepage body.
A reverse filtering layer 11 is arranged between the stone slag weir body 1 and the inclined wall seepage-proofing body 2. Further improving reverse osmosis effect.
The above is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any simple changes, equivalent substitutions or modifications and the like made on the basis of the present utility model to solve the substantially same technical problems and achieve the substantially same technical effects are included in the scope of the present utility model.
Claims (7)
1. Novel inclined wall cofferdam weir shoulder seepage prevention additional strengthening, its characterized in that: the stone slag dam comprises a stone slag dam body, an inclined wall anti-seepage body, a dam shoulder anti-seepage reinforcing unit and clay covering bodies, wherein the inclined wall anti-seepage body is arranged on the stone slag dam body, the clay covering bodies are arranged at the toe of the inclined wall anti-seepage body, and the dam shoulder anti-seepage reinforcing unit is arranged at two sides of the inclined wall anti-seepage body.
2. The novel inclined wall cofferdam shoulder-weir anti-seepage reinforcing structure according to claim 1, which is characterized in that: the dam shoulder seepage-proofing reinforcing unit comprises a geomembrane and a clay leveling layer, wherein the clay leveling layer is arranged on the inclined wall seepage-proofing body, and the geomembrane is laid on the clay leveling layer.
3. The novel inclined wall cofferdam shoulder-weir anti-seepage reinforcing structure according to claim 2, which is characterized in that: the wall-chute seepage-proofing body is provided with a wall-chute notch, a bank slope notch is arranged on a bank slope bedrock close to the wall-chute seepage-proofing body, two sides of the geomembrane are respectively arranged in the wall-chute notch and the bank slope notch, and compaction clay blocks are respectively arranged in the wall-chute notch and the bank slope notch so as to compact the geomembrane.
4. The novel inclined wall cofferdam shoulder-weir anti-seepage reinforcing structure according to claim 2, which is characterized in that: and a sprayed concrete layer is arranged on the geomembrane to compress the geomembrane.
5. The novel inclined wall cofferdam shoulder-weir anti-seepage reinforcing structure according to claim 2, which is characterized in that: and a folded corner hanging net is arranged at the joint of the bank slope bedrock and the inclined wall seepage-proofing body, and the folded corner hanging net is arranged between the geomembrane and the clay leveling layer.
6. The novel inclined wall cofferdam shoulder-weir anti-seepage reinforcing structure according to claim 2, which is characterized in that: the geomembrane extends at the toe of the slope, and the clay covering body covers the extending geomembrane.
7. The novel inclined wall cofferdam shoulder-weir anti-seepage reinforcing structure according to claim 1, which is characterized in that: and a reverse filtering layer is arranged between the stone slag weir body and the inclined wall seepage-proofing body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320257853.8U CN220202718U (en) | 2023-02-09 | 2023-02-09 | Novel anti-seepage reinforcing structure for dam shoulder of inclined wall cofferdam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320257853.8U CN220202718U (en) | 2023-02-09 | 2023-02-09 | Novel anti-seepage reinforcing structure for dam shoulder of inclined wall cofferdam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220202718U true CN220202718U (en) | 2023-12-19 |
Family
ID=89145564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320257853.8U Active CN220202718U (en) | 2023-02-09 | 2023-02-09 | Novel anti-seepage reinforcing structure for dam shoulder of inclined wall cofferdam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220202718U (en) |
-
2023
- 2023-02-09 CN CN202320257853.8U patent/CN220202718U/en active Active
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