CN209975545U - Earth-rock cofferdam adapting to high flow velocity - Google Patents
Earth-rock cofferdam adapting to high flow velocity Download PDFInfo
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- CN209975545U CN209975545U CN201920367350.XU CN201920367350U CN209975545U CN 209975545 U CN209975545 U CN 209975545U CN 201920367350 U CN201920367350 U CN 201920367350U CN 209975545 U CN209975545 U CN 209975545U
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- earth
- geotextile
- cofferdam
- bank protection
- rubble
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Abstract
The utility model relates to a cofferdam is administered in the river course, in particular to adapt to earth and rockfill cofferdam of high velocity of flow, trapezoidal weir body and interior bank protection, interior bank protection lay in the inboard one side of weir body, and interior bank protection is laid by a plurality of stone bags and is formed, the stone bag is formed by steel wire cage parcel rubble. The utility model discloses in, because interior bank protection is laid by the stone bag and is formed, and the stone bag is formed by steel wire cage parcel rubble, consequently interior bank protection has the resistant performance that erodees owing to the reason of rubble in the stone bag, and the stone bag forms holistic structure, make the rubble difficult by the rivers of the high velocity of flow wash away, after the bank protection in the rivers impact of the high velocity of flow, the rubble in the stone bag blocks the buffering back, can reduce the speed that rivers washed away the weir body by a wide margin, consequently make the earth-rock cofferdam can adapt to the high velocity of flow river.
Description
Technical Field
The utility model relates to a cofferdam is administered in the river course, in particular to adapt to earth and rockfill cofferdam of high velocity of flow.
Background
In the process of river regulation, especially for wider rivers, cofferdams are usually adopted to form an anhydrous construction environment, so that construction in the cofferdams is facilitated, and commonly-used cofferdams comprise earth-rock cofferdams, grass-wood cofferdams, wooden sheet pile cofferdams, steel sheet pile cofferdams and the like, wherein the earth-rock cofferdams are frequently used in shallow river beds, and the earth-rock cofferdams are formed by piling earth and stones, so that the construction is convenient to form, but the applicability is poor, and the cofferdams are only suitable for the working conditions that the water depth is within 2 meters and the flow speed is below 0.5 m/s. Once the flow velocity of the working condition exceeds 0.5 m/s, impact is caused to the revetment of the cofferdam, and the structure of the cofferdam is damaged.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an earth and rockfill cofferdam of adaptation high flow rate has promoted the shock resistance in earth and rockfill cofferdam, makes it adapt to high flow rate river.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
the utility model provides an earth and rockfill cofferdam of adaptation high velocity of flow, trapezoidal weir body and interior bank protection, interior bank protection lay in the inboard one side of weir body, and interior bank protection is laid by a plurality of stone bags and is formed, the stone bag is formed by steel wire cage parcel rubble.
Through adopting above-mentioned technical scheme, because interior bank protection is laid by the stone bag and is formed, and the stone bag is formed by steel wire cage parcel rubble, consequently interior bank protection has the resistant performance of erodeing owing to the reason of rubble in the stone bag, and the stone bag forms holistic structure, make the rubble difficult by the rivers of high velocity of flow wash away, after the bank protection in the water impact of high velocity of flow, rubble in the stone bag blocks the buffering back, can reduce the speed that rivers washed the weir body by a wide margin, consequently make the earth rock cofferdam can adapt to high velocity of flow river.
The utility model discloses further set up to: the weir body includes base member and waterproof geotechnological cloth, and geotechnological cloth is laid between interior bank protection and the weir body.
Through adopting above-mentioned technical scheme, set up waterproof geotechnological cloth in the outside of base member, can promote the water proof performance of weir body, can avoid rivers directly to erode geotechnological cloth when geotechnological cloth is located the inboard of bank protection, can promote geotechnological cloth's stability.
The utility model discloses further set up to: the lower end of the geotextile is embedded in the riverbed below the cofferdam.
Through adopting above-mentioned technical scheme, because the lower extreme of geotechnological cloth is buried underground in the below of riverbed, consequently utilize geotechnological cloth can obstruct the gap between weir and the riverbed, further promote the waterproof performance of weir, reduce the possibility that the river seeps water from the gap between weir and the riverbed.
The utility model discloses further set up to: the geotextile comprises a plurality of geotextile pieces, wherein the geotextile pieces are spliced and laid on the outer side surface of the weir body, and the geotextile pieces are mutually overlapped and connected at the splicing positions.
Through adopting above-mentioned technical scheme, polylith geotechnological cloth splices mutually, is convenient for lay geotechnological cloth, also is convenient for demolish the cofferdam simultaneously.
The utility model discloses further set up to: and a buffer soil layer is filled outside the geotextile.
Through adopting above-mentioned technical scheme, buffer soil layer can shelter from geotechnological cloth, avoids the rubble fish tail geotechnological cloth of interior bank protection.
The utility model discloses further set up to: the buffer soil layer is made of a mixture of clay and sand.
By adopting the technical scheme, the clay and sand mixture has high stability and is resistant to scouring.
The utility model discloses further set up to: the matrix is formed by piling geotextile bags filled with soil.
Through adopting above-mentioned technical scheme, in the river course that contains water, still can form the base member through piling up, avoid being washed away by rivers at the in-process grit of piling up the base member, also can reduce the turbidity of the in-process rivers that form the cofferdam in addition.
The utility model is further arranged that the thickness of the buffer soil layer is 3 ~ 5 cm.
Through adopting above-mentioned technical scheme, the thickness on buffer soil layer is difficult for being too thin, and the rubble on the bank protection also pierces through buffer soil layer fish tail geotechnological cloth easily in otherwise, also is difficult for also being too thick simultaneously, and the used earthwork volume of buffer soil layer is more otherwise, can have the extravagant condition.
To sum up, the utility model discloses following technological effect has: through the interior bank protection of laying in the inboard of the weir body, utilize the shock resistance of grit bag, promote the shock resistance of cofferdam, reach the effect that adapts to the high velocity of flow.
Drawings
Fig. 1 is a schematic sectional structure of the present invention.
In the figure, 1, a weir body; 11. a substrate; 12. geotextile; 13. a buffer soil layer; 2. and (6) inner slope protection.
Detailed Description
As shown in fig. 1, the utility model provides an earth rock cofferdam of adaptation high velocity of flow, including weir 1 and interior bank protection 2, weir 1 is trapezoidal, and interior bank protection 2 is laid in the inboard one side of weir 1, and interior bank protection 2 is laid by a plurality of stone bags and is formed, the stone bag is formed by steel wire cage parcel rubble. Utilize the stone bag to promote the wholeness of rubble, reduce the rubble and be taken away by the water impact of high velocity of flow, and the rubble in the stone bag has good impact resistance, can resist the erodeing of high-speed rivers, after bank protection 2 in the water impact of high velocity of flow, the rubble in the stone bag blockked the buffering back, can reduce the speed that water washout weir body 1 by a wide margin, reduce the loss of weir body 1 soil to make the cofferdam can adapt to the operating mode of high velocity of flow.
The earth-rock cofferdam is also prone to water seepage after construction, which has a significant impact on the structural strength of the cofferdam. In order to improve the waterproof performance of the cofferdam, as shown in fig. 1, the weir body 1 comprises a base body 11, a waterproof geotextile 12 and a buffer soil layer 13 which are laid in sequence; the matrix 11 is formed by piling up geotextile bags filled with soil, so that the matrix 11 is easier to form in a riverway with higher flow velocity, sand and stone are prevented from being washed away by water flow in the process of piling up the matrix 11, and the turbidity of the water flow in the process of piling up and forming a cofferdam can be reduced; the waterproof geotextile 12 has a main waterproof function, when the geotextile 12 is positioned at the inner side of the inner protection slope 2, water flow can be prevented from directly scouring the geotextile 12, the stability of the geotextile 12 can be improved, the buffer soil layer 13 has a buffer effect, the geotextile 12 can be prevented from being scratched by a stone bag of the inner protection slope 2 in the process of laying the inner protection slope 2, the buffer soil layer 13 is preferably a mixture of clay and gravel, the weight ratio is preferably 1:1, the gravel is fine-grain gravel or cobblestone, and the mixture of clay and gravel has high stability and is resistant to scouring.
In addition, the thickness of buffer soil layer 13 is not easy to be too thin, otherwise the broken stones on inner protection slope 2 are also easy to penetrate through buffer soil layer 13 to scratch geotextile 12, and meanwhile, the broken stones are not easy to be too thick, and the waste condition can exist due to more earthwork amount used by buffer soil layer 13, so the thickness of buffer soil layer 13 is 3 ~ 5 cm.
As shown in fig. 1, the lower end of the geotextile 12 is buried in the river bed below the cofferdam, and the lower end of the geotextile 12 is buried below the river bed, so that the geotextile 12 can block the gap between the weir body 1 and the river bed, thereby further improving the waterproof performance of the weir body 1 and reducing the possibility of water seepage from the gap between the weir body 1 and the river bed.
Because after the river course is administered and is accomplished, the cofferdam need be demolishd, and in order to facilitate the demolishment of cofferdam, geotechnological cloth 12 sets the polylith to better, adopts the mode concatenation of overlap joint amalgamation of each other to splice between geotechnological cloth 12 and lays, is convenient for lay geotechnological cloth 12 like this more, also is convenient for demolish the cofferdam simultaneously, avoids geotechnological cloth 12 to be the difficult problem of being under construction behind a whole.
To sum up, in the utility model, the inner protective slope 2 formed by laying stone bags plays a main anti-scouring role, reduces the scouring of the weir body 1 by the high-flow-rate water flow, and improves the stability of the weir body 1, so that the weir body can adapt to the high-flow-rate water flow; meanwhile, the geotextile 12 in the cofferdam 1 plays a role in water prevention, the possibility of water seepage to the outer side of the cofferdam is reduced, the structural strength of the cofferdam is improved, and the safety of external construction of the cofferdam is improved.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (7)
1. The utility model provides an adapt to earth and rockfill cofferdam of high velocity of flow, its characterized in that, the earth and rockfill cofferdam includes trapezoidal weir body (1) and interior bank protection (2), and interior bank protection (2) are laid in the inboard one side of weir body (1), and interior bank protection (2) are laid by a plurality of stone bags and are formed, the stone bag is formed by steel wire cage parcel rubble.
2. High flow rate compliant earth rock cofferdam according to claim 1 characterized by that the weir (1) comprises a base (11) and a waterproof geotextile (12), the geotextile (12) is laid between the inner revetment (2) and the weir (1).
3. A high flow rate compliant earth and rock cofferdam according to claim 2 characterized in that the lower end of the geotextile (12) is buried in the bed below the cofferdam.
4. The high flow rate adaptable earth rock cofferdam of claim 2 wherein the geotextile (12) comprises a plurality of geotextile pieces, a plurality of geotextile pieces (12) are spliced and laid on the outer side of the weir body (1), and a plurality of geotextile pieces (12) are overlapped at the spliced position.
5. A high flow rate adapted earth-rock cofferdam according to claim 2 characterized in that the outside of geotextile (12) is filled with a buffer layer (13).
6. High flow rate compliant earth-rock cofferdam according to claim 2 characterized by that the matrix (11) is built up of geotextile bags filled with soil.
7. A high flow rate adapted earth rock cofferdam according to claim 5 characterized in that the thickness of the buffer soil layer (13) is 3 ~ 5 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920367350.XU CN209975545U (en) | 2019-03-21 | 2019-03-21 | Earth-rock cofferdam adapting to high flow velocity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920367350.XU CN209975545U (en) | 2019-03-21 | 2019-03-21 | Earth-rock cofferdam adapting to high flow velocity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209975545U true CN209975545U (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920367350.XU Expired - Fee Related CN209975545U (en) | 2019-03-21 | 2019-03-21 | Earth-rock cofferdam adapting to high flow velocity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809139A (en) * | 2022-05-07 | 2022-07-29 | 中国安能集团第三工程局有限公司 | Method for rapidly repairing seepage of earth-rock cofferdam with deep and thick covering layer |
-
2019
- 2019-03-21 CN CN201920367350.XU patent/CN209975545U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809139A (en) * | 2022-05-07 | 2022-07-29 | 中国安能集团第三工程局有限公司 | Method for rapidly repairing seepage of earth-rock cofferdam with deep and thick covering layer |
| CN114809139B (en) * | 2022-05-07 | 2023-12-26 | 中国安能集团第三工程局有限公司 | Rapid repairing method for leakage of deep coverage earth-rock cofferdam |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 050000 rooms 904 and 905, Kaiyuan Building, No. 58, fangbei Road, Chang'an District, Shijiazhuang City, Hebei Province Patentee after: Hebei Haochuan Engineering Design Co.,Ltd. Address before: 050000 rooms 904 and 905, Kaiyuan Building, No. 58, fangbei Road, Yuhua District, Shijiazhuang City, Hebei Province Patentee before: Hebei Haochuan Engineering Consulting Co.,Ltd. |
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| 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: 20200121 |