CN211621471U - Water stop type suitable for inclined wall geomembrane cofferdam bank slope toe board construction joint - Google Patents
Water stop type suitable for inclined wall geomembrane cofferdam bank slope toe board construction joint Download PDFInfo
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- CN211621471U CN211621471U CN201921621139.2U CN201921621139U CN211621471U CN 211621471 U CN211621471 U CN 211621471U CN 201921621139 U CN201921621139 U CN 201921621139U CN 211621471 U CN211621471 U CN 211621471U
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Abstract
The utility model relates to a stagnant water type suitable for inclined wall geomembrane cofferdam bank slope toe board construction joint. The utility model aims at providing a simple structure, construction convenience, lower stagnant water type that is applicable to inclined wall geomembrane cofferdam bank slope toe board construction joint of cost. The technical scheme of the utility model is that: the bank slope toe board consists of a first-stage concrete toe board and a second-stage concrete toe board, wherein a notch for pouring the second-stage concrete toe board is reserved at the position, close to the inclined wall geomembrane cofferdam, of the upper part of the first-stage concrete toe board; the cofferdam composite geomembrane in the inclined wall geomembrane cofferdam extends into the gap and covers the bottom surface of the gap; the waterproof geomembrane is buried in the first-stage concrete toe board, the lower end of the waterproof geomembrane extends to the bottom surface of the first-stage concrete toe board, and the upper end of the waterproof geomembrane is connected with the cofferdam composite geomembrane in the gap in a welding mode. The utility model is suitable for a bank slope concrete toe board in inclined wall geomembrane cofferdam.
Description
Technical Field
The utility model relates to a stagnant water type suitable for inclined wall geomembrane cofferdam bank slope toe board construction joint. The bank slope concrete toe board is suitable for the inclined wall geomembrane cofferdam.
Background
The inclined wall geomembrane cofferdam has the characteristics that the ascending speed of the weir body filling is high, the geomembrane laying and welding are convenient, the weir body filling and the geomembrane laying are not interfered with each other, the later-stage maintenance is convenient and the like, and the inclined wall geomembrane cofferdam is widely applied to water conservancy and hydropower construction engineering. The water stopping of the concrete construction joint of the shore slope toe board is generally realized by adopting a rubber water stopping belt, the thickness is generally 6 mm-12 mm, and the type of the water stopping belt is generally a flat plate type or a central hole type.
In order to ensure the integrity of the cofferdam seepage-proofing system, the water stop belt needs to be connected with the waterproof geomembrane of the cofferdam body, but the rubber water stop belt has uneven surface, poor bonding and welding effects with the geomembrane and is easy to become a water leakage channel of the cofferdam.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: aiming at the problems, the water-stopping type applicable to the construction joint of the toe board of the bank slope of the inclined wall geomembrane cofferdam is simple in structure, convenient to construct and low in cost.
The utility model adopts the technical proposal that: the utility model provides a stagnant water type suitable for inclined wall geomembrane cofferdam and bank slope toe board construction joint which characterized in that: the bank slope toe board consists of a first-stage concrete toe board and a second-stage concrete toe board, wherein a notch for pouring the second-stage concrete toe board is reserved at the position, close to the inclined wall geomembrane cofferdam, of the upper part of the first-stage concrete toe board;
the cofferdam composite geomembrane in the inclined wall geomembrane cofferdam extends into the gap and covers the bottom surface of the gap;
the waterproof geomembrane is buried in the first-stage concrete toe board, the lower end of the waterproof geomembrane extends to the bottom surface of the first-stage concrete toe board, and the upper end of the waterproof geomembrane is connected with the cofferdam composite geomembrane in the gap in a welding mode.
The water-stopping geomembrane is lapped with the cofferdam composite geomembrane, the lapping length is more than or equal to 30cm, and the geotextile only remains the light film after the water-stopping geomembrane and the cofferdam composite geomembrane at the lapping position are stripped.
The water-stopping geomembrane is a cloth-film, a cloth-film or a light film.
And flat steel is pressed on the lap joint part of the water-stopping geomembrane and the cofferdam composite geomembrane and is fixed on the first-stage concrete toe board through bolts.
A groove is formed in the base layer below the first-stage concrete toe board, and the lower end of the water-stopping geomembrane extends into the groove in the base layer.
The cross section of the water-stopping geomembrane is L-shaped.
And a layer of asphalt is arranged on the bottom surface of the notch below the cofferdam composite geomembrane.
The utility model has the advantages that: the utility model discloses the stagnant water geomembrane that well buries in the bank slope toe board is the same with the compound geomembrane material in cofferdam, and welding effect is good, has improved inclined wall geomembrane cofferdam prevention of seepage system reliability. The stagnant water geomembrane is light small and exquisite, and the construction is buried the convenience underground, has reduced the toe board concrete placement construction degree of difficulty. Compared with the conventional rubber water stop material, the water stop geomembrane adopted as the water stop material in the toe boards of the inclined wall geomembrane cofferdam has the advantages of low cost and good economical efficiency.
Drawings
Fig. 1 is a schematic structural diagram of the embodiment.
Fig. 2 is an enlarged view of a portion a of fig. 1.
Fig. 3 is a sectional view taken along line a-a of fig. 2.
Detailed Description
As shown in fig. 1 to 3, the embodiment is a water-stop type suitable for a construction joint of an inclined wall geomembrane cofferdam and a bank slope toe board, the bank slope toe board is composed of a first-stage concrete toe board 3 and a second-stage concrete toe board 4, wherein a gap is reserved at the upper part of the first-stage concrete toe board 3 close to the inclined wall geomembrane cofferdam, and the bank slope toe board is formed after the second-stage concrete toe board 4 is poured in the gap of the first-stage concrete toe board 3.
In the embodiment, the bottom surface of the notch of the first-stage concrete toe board 3 is coated with a layer of asphalt 6 with the thickness of 2mm, and the cofferdam composite geomembrane 2 in the inclined-wall geomembrane cofferdam extends into the notch and covers the asphalt 6 on the bottom surface of the notch.
In this example, a water-stopping geomembrane 1 (the water-stopping geomembrane 1 is two cloth-one film, one cloth-one film or light film) is embedded in the first-stage concrete toe board 3, and the cross section of the water-stopping geomembrane 1 in the first-stage concrete toe board 3 is in an L shape. The lower end of the water-stopping geomembrane 1 extends to the bottom surface of the first-stage concrete toe board 3, the upper end of the water-stopping geomembrane is exposed out of the gap from the side surface of the gap and is lapped and welded with the cofferdam composite geomembrane 2 in the gap.
The overlapping length of the water-stopping geomembrane 1 and the cofferdam composite geomembrane 2 is more than or equal to 30cm, and the geotextile is stripped from the water-stopping geomembrane 1 and the cofferdam composite geomembrane 2 at the overlapping position and only the residual membrane is stripped. And flat steel 5 is pressed on the lap joint part of the water-stopping geomembrane 1 and the cofferdam composite geomembrane 2 and is fixed on the first-stage concrete toe board 3 through bolts 7.
In this embodiment, a groove is formed in the base layer below the first-stage concrete toe board 3, and the lower end of the water-stopping geomembrane 1 extends into the groove in the base layer.
The specific implementation of this example is as follows:
1. embedding a water-stop geomembrane 1 and a 1.5 cm-thick asphalt template 8, pouring a first-stage concrete toe board 3, brushing 2 mm-thick asphalt 6 on the concrete surface in contact with the cofferdam composite geomembrane 2, wherein the overlapping length of the water-stop geomembrane 1 and the cofferdam composite geomembrane 2 is not less than 30cm, and the upper and lower layers of geotextile are stripped from the water-stop geomembrane 1 and the cofferdam composite geomembrane 2 at the overlapping part, and only the light film is left;
2. welding the water-stopping geomembrane 1 and the cofferdam composite geomembrane 2 by adopting a special welding machine for the geomembrane;
3. drilling bolt holes at the lap joint part of the water-stopping geomembrane 1 and the cofferdam composite geomembrane 2, paving flat steel 5 above the bolt holes, inserting bolts 7 (galvanized expansion bolts), and screwing nuts to anchor the lap joint part;
4. and pouring a second-stage concrete toe board 4, and protecting the lap joint part of the water-stopping geomembrane 1 and the cofferdam composite geomembrane 2.
4. And pouring second-stage concrete, and protecting the lap joint part of the water-stopping geomembrane 1 and the cofferdam composite geomembrane 2.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art can change, add or replace the above examples within the scope of the present invention.
Claims (7)
1. The utility model provides a stagnant water type suitable for inclined wall geomembrane cofferdam bank slope toe board construction joint which characterized in that: the bank slope toe board consists of a first-stage concrete toe board (3) and a second-stage concrete toe board (4), wherein a notch for pouring the second-stage concrete toe board (4) is reserved at the position, close to the inclined wall geomembrane cofferdam, of the upper part of the first-stage concrete toe board (3);
the cofferdam composite geomembrane (2) in the inclined wall geomembrane cofferdam extends into the gap and covers the bottom surface of the gap;
water-stopping geomembrane (1) is buried in the first-stage concrete toe board (3), the lower end of the water-stopping geomembrane (1) extends to the bottom surface of the first-stage concrete toe board (3), and the upper end of the water-stopping geomembrane is connected with the cofferdam composite geomembrane (2) in the gap in a welding manner.
2. The water stop pattern suitable for the inclined wall geomembrane cofferdam bank slope toe board construction joint as claimed in claim 1, wherein: the water-stopping geomembrane (1) is lapped with the cofferdam composite geomembrane (2), the lapping length is more than or equal to 30cm, and only the residual geomembrane of the geotextile is stripped from the water-stopping geomembrane (1) and the cofferdam composite geomembrane (2) at the lapping position.
3. The water stop pattern suitable for the inclined wall geomembrane cofferdam bank slope toe board construction joint as claimed in claim 2, wherein: the water-stopping geomembrane (1) is a cloth-film, a cloth-film or a light film.
4. The water stop pattern suitable for the inclined wall geomembrane cofferdam bank slope toe board construction joint as claimed in claim 2, wherein: and flat steel (5) is pressed on the lap joint part of the water-stopping geomembrane (1) and the cofferdam composite geomembrane (2) and is fixed on the first-stage concrete toe board (3) through bolts (7).
5. The water stop pattern suitable for the inclined wall geomembrane cofferdam bank slope toe board construction joint as claimed in claim 1, wherein: a groove is formed in the base layer below the first-stage concrete toe board (3), and the lower end of the water-stopping geomembrane (1) extends into the groove in the base layer.
6. The water stop pattern suitable for the inclined wall geomembrane cofferdam bank slope toe board construction joint as claimed in claim 1, wherein: the cross section of the water-stopping geomembrane (1) is L-shaped.
7. The water stop pattern suitable for the inclined wall geomembrane cofferdam bank slope toe board construction joint as claimed in claim 1, wherein: and a layer of asphalt (6) is arranged on the bottom surface of the gap below the cofferdam composite geomembrane (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921621139.2U CN211621471U (en) | 2019-09-26 | 2019-09-26 | Water stop type suitable for inclined wall geomembrane cofferdam bank slope toe board construction joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921621139.2U CN211621471U (en) | 2019-09-26 | 2019-09-26 | Water stop type suitable for inclined wall geomembrane cofferdam bank slope toe board construction joint |
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| CN211621471U true CN211621471U (en) | 2020-10-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593202A (en) * | 2019-09-26 | 2019-12-20 | 中国电建集团华东勘测设计研究院有限公司 | Water stop type suitable for inclined wall geomembrane cofferdam bank slope toe board construction joint |
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2019
- 2019-09-26 CN CN201921621139.2U patent/CN211621471U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593202A (en) * | 2019-09-26 | 2019-12-20 | 中国电建集团华东勘测设计研究院有限公司 | Water stop type suitable for inclined wall geomembrane cofferdam bank slope toe board construction joint |
| CN110593202B (en) * | 2019-09-26 | 2024-07-19 | 中国电建集团华东勘测设计研究院有限公司 | Water stop type suitable for construction joints of bank slope toe boards of inclined wall geomembrane cofferdam |
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