CN219568761U - Cofferdam structure capable of accumulating materials - Google Patents
Cofferdam structure capable of accumulating materials Download PDFInfo
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- CN219568761U CN219568761U CN202222600451.1U CN202222600451U CN219568761U CN 219568761 U CN219568761 U CN 219568761U CN 202222600451 U CN202222600451 U CN 202222600451U CN 219568761 U CN219568761 U CN 219568761U
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Abstract
The utility model relates to a cofferdam structure taking into account the storage of materials. Is suitable for the technical field of large and medium-sized hydraulic and hydroelectric engineering design and construction. The technical scheme adopted by the utility model is as follows: a cofferdam structure taking into account the stockpiling of materials is provided with a cofferdam anti-seepage body, an upstream filling area and a downstream filling area which are positioned at the upstream and downstream of the cofferdam anti-seepage body, and is characterized in that the upper part of a weir body infiltration line of the downstream filling area is provided with a filling area I for recovering the filler after the cofferdam structure is dismantled.
Description
Technical Field
The utility model relates to a cofferdam structure taking into account the storage of materials. Is suitable for the technical field of large and medium-sized hydraulic and hydroelectric engineering design and construction.
Background
Large and medium-sized hydraulic and hydroelectric engineering is generally built in mountain gorge areas far away from cities, a large amount of stone residues can be generated in excavation construction of slopes, foundations, underground engineering and the like, and a large amount of stones are needed for backfilling cofferdams, places and the like and building concrete pouring and the like. Therefore, reasonable stone balance planning is carried out, the stone is excavated by effectively utilizing engineering, and the stone is used as filling materials or concrete aggregate, so that engineering investment can be greatly saved, and the damage of a large amount of waste slag to the environment can be reduced, thereby having great significance.
The engineering excavation and filling procedures are concentrated in the early engineering stage, and concrete pouring is mainly carried out after the engineering excavation is finished, and the common practice is as follows: in the early stage, the excavation stone slag firstly meets the filling construction, the worse stone is used for filling fields, roadbeds and the like, and the better stone is used for filling important structures such as cofferdams and the like; after filling requirements are met, the remaining bad stones are discarded to a waste slag field, the better stones are piled to a transfer material field, and after concrete is poured, the stones are extracted and processed from the transfer material field to be used as concrete aggregate; after the full line casting elevation of the dam exceeds the elevation of the upstream cofferdam, the dam is used for retaining water, the cofferdam is removed, and the slag materials after the cofferdam is removed are discarded to a waste slag field.
From the practical point of view, the above measures currently have the following problems:
(1) The cofferdam is filled with a large amount of stones, a large amount of high-quality excavation stones can be consumed, so that the available source of concrete aggregate is reduced, the stone is required to be supplemented by stone field mining materials or outsourcing materials and the like, and great cost increase and resource waste are caused.
(2) The cofferdam demolishs and needs to arrange very big waste slag field, needs to occupy the regional scarce land resource in mountain gorge valley.
(3) The cofferdam demolishs the material and abandons to abandon the slag yard, need carry out the clear table in place, set up water conservation facilities such as toe guard, domatic protection, place interception drainage, need great engineering investment.
Disclosure of Invention
The utility model aims to solve the technical problems that: aiming at the problems, the cofferdam structure with the material piling function is provided.
The technical scheme adopted by the utility model is as follows: a cofferdam structure taking into account the stockpiling of materials is provided with a cofferdam seepage-proofing body, and an upstream filling area and a downstream filling area which are positioned at the upstream and downstream of the cofferdam seepage-proofing body, and is characterized in that: and a filling area I is arranged at the upper part of the weir body infiltration line of the downstream filling area, and useful materials to be recovered after the cofferdam structure is removed are filled in the filling area I.
And a filling area II is arranged between the two ends of the filling area I and the bank slopes on the two sides.
The filling area I is provided with a plurality of layers, and a filling area II is arranged between each layer of filling area I and the bank slopes on two sides.
And a geomembrane is arranged between the filling area I and the adjacent filling area II.
The side surface of the filling area II, which is contacted with the filling area I, is a slope surface.
The construction method of the cofferdam structure taking the material stockpiling into consideration is characterized by comprising the following steps of:
carrying out cofferdam structure design, and determining cofferdam and seepage-proofing body types;
performing cofferdam seepage calculation based on the designed cofferdam structure, determining the elevation of a downstream weir body seepage line of the seepage-proofing body, and determining the range of a filling area I according to the range of the seepage-proofing body, the elevation of the weir body seepage line and the bank slope types of the two banks;
and (3) carrying out cofferdam filling construction, layering the filling areas I, and firstly constructing filling areas II at two ends of the filling areas I and then constructing the middle filling area I when carrying out same-layer construction.
The beneficial effects of the utility model are as follows: the filling area I is arranged on the downstream of the cofferdam seepage-proofing body and above the weir body infiltration line, a certain distance is kept between the filling area I and the bank slopes of the two banks, pollution to the filler in the filling area I caused by sediment carried by river water and underground water is reduced, the filler in the filling area I is recovered after the cofferdam is removed, and resource waste is avoided. When the cofferdam is removed, the filling materials in the stoping material filling area are used as concrete aggregate, and the cofferdam has two purposes, so that engineering investment can be greatly saved. The side surface of the filling area II, which is contacted with the filling area I, is a slope surface, and a geomembrane is paved, so that the mixing and pollution of high-quality filler in the filling area I and common filler in the filling area II are prevented.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment.
Fig. 2 is a schematic diagram of the structure of the downstream side of the embodiment.
1. A useful filler; 2. a cofferdam seepage-proofing body; 3. a weir wetting line; 4. a common filler; 5. a slope; 6. geomembrane; 7. a layering line; 8. and (5) a bank slope.
Detailed Description
As shown in fig. 1 and 2, the present embodiment is a cofferdam structure that has both a cofferdam impermeable body and an upstream filling area and a downstream filling area that are disposed upstream and downstream of the cofferdam impermeable body.
In the embodiment, the downstream filling area is divided into an upper filling area and a lower filling area, wherein the upper filling area is positioned above a weir body infiltration line of the downstream filling area, a filling area I is arranged in the upper filling area, and a filling area II is arranged between two ends of the filling area I and two bank slopes, so that the filling area I and the bank slopes are kept at a certain distance.
In the embodiment, filling the filling area I with the filler (useful filler) which is recovered after the cofferdam is removed, and filling the filling area II with the filler (common filler) which is not recovered later; and common filler is filled in the lower filling area and the upstream filling area.
In the embodiment, the upper filling area is a multilayer structure formed by layered construction, the middle of each layer of structure is a filling area I, two ends of each layer of structure are filling areas II, and the side surface of each filling area II, which is in contact with each filling area I, is a slope so as to ensure that the filling area II constructed first is stable in structure.
In order to prevent the common filler from being mixed into the useful filler, in this example, a geomembrane is laid on the contact surface (between the lower filling area and the adjacent useful filler area, between the useful filler areas and between the adjacent filling areas II) between the useful filler and the common filler.
The specific construction method of the embodiment is as follows:
a. carrying out cofferdam structure design, and determining cofferdam and cofferdam seepage-proofing body types;
b. performing cofferdam seepage calculation based on the designed cofferdam structure, determining the seepage line elevation of a downstream weir body of the seepage-proofing body, and determining the range of a useful filler area according to the range of the seepage-proofing body, the seepage line elevation and the bank slope types of two banks;
c. dividing cofferdam filling materials, filling common filling materials into an upstream filling area, a lower filling area and a filling area II, and filling high-quality useful filling materials into a filling area I; the filling materials are strictly controlled, and mud clamping materials, weathered materials and materials with lower strength are prevented from entering a filling area I while the filling material index of the cofferdam is met;
d. when the filling area I is used for carrying out cofferdam filling construction, the transportation vehicles and rolling equipment entering the filling area should be washed, so that the pollution of the useful materials is avoided.
e. When the cofferdam is filled, the downstream filling area carries out layered rolling construction according to the upper layered line as shown in fig. 2, the lower filling area below the filling area I is firstly constructed, then the upper filling area is constructed, when the upper filling area carries out the same-layer construction, the filling areas II on two sides are firstly constructed, and then the middle filling area I is constructed; a slope is arranged between the filling area II and the filling area I1, so that common filler is prevented from being mixed with useful filler; when the filling area II has a partial range at the upper part of the filling area I, the geomembrane is used for separation, so that common materials are prevented from being mixed with useful materials.
When the cofferdam is removed, and then the same-layer construction is carried out, firstly removing the middle filling area I, then removing the filling areas II on two sides, and extracting and processing useful fillers after the filling areas I are removed to be used as concrete aggregates.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that, for those skilled in the art, modifications and variations can be made without departing from the technical principles of the present utility model, such as the use of geotechnical membrane isolation between common materials and useful materials, and geotechnical cloth isolation, etc. are also considered as the scope of the present utility model.
Claims (3)
1. A cofferdam structure taking into account the stockpiling of materials is provided with a cofferdam seepage-proofing body, and an upstream filling area and a downstream filling area which are positioned at the upstream and downstream of the cofferdam seepage-proofing body, and is characterized in that: the upper part of a weir body infiltration line of the downstream filling area is provided with a filling area I for recovering the filler after the cofferdam structure is dismantled;
a filling area II is arranged between the two ends of the filling area I and the bank slopes on the two sides; and a geomembrane is arranged between the filling area I and the adjacent filling area II.
2. The cofferdam structure for the stockpiling of useful materials according to claim 1, wherein: the filling area I is provided with a plurality of layers, and a filling area II is arranged between each layer of filling area I and the bank slopes of two banks.
3. The cofferdam structure for the stockpiling of useful materials according to claim 1, wherein: the side surface of the filling area II, which is contacted with the filling area I, is a slope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222600451.1U CN219568761U (en) | 2022-09-24 | 2022-09-24 | Cofferdam structure capable of accumulating materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222600451.1U CN219568761U (en) | 2022-09-24 | 2022-09-24 | Cofferdam structure capable of accumulating materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219568761U true CN219568761U (en) | 2023-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222600451.1U Active CN219568761U (en) | 2022-09-24 | 2022-09-24 | Cofferdam structure capable of accumulating materials |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219568761U (en) |
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2022
- 2022-09-24 CN CN202222600451.1U patent/CN219568761U/en active Active
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