Anti-seepage stable cofferdam structure and construction method thereof

Abstract

The invention provides an anti-seepage stable cofferdam structure and a construction method thereof. The cofferdam structure comprises a cofferdam foundation, and further comprises a berm and a cofferdam body which are sequentially arranged from the upstream face to the downstream face; the cofferdam foundation is filled with the berm; the berm and the cofferdam foundation are filled with the cofferdam body; sand cushion layers are laid on the upstream face of the berm and the upstream face of the cofferdam body; mold bag concrete protection slopes are laid outside the sand cushion layers; an anti-seepage wall is arranged in the berm; a composite geomembrane is buried in the cofferdam body; the lower end of the composite geomembrane is connected to the upper end of the anti-seepage wall in a pouring manner; and the berm and the anti-seepage stable cofferdam structure are each of a trapezoid structure. According to the anti-seepage stable cofferdam structure and the construction method thereof, the stability of the cofferdam structure can be maintained without increasing the height of a cofferdam or decreasing the gradient of the cofferdam, the size of the cofferdam structure is reduced, the situation that the work amount of the cofferdam structure is sharply increased is avoided, and the project cost is remarkably reduced.

Description

technical field [0001] The invention belongs to the technical field of cofferdams, and in particular relates to a seepage-proof and stable cofferdam structure and a construction method thereof. Background technique [0002] In the construction of water conservancy projects, in order to build some long-term use of water conservancy equipment, it is necessary to drain the working environment of the construction equipment, so it is particularly important to build temporary water retaining structures. The vast majority of water conservancy projects use cofferdams as temporary water retaining structures. The function of cofferdams is to prevent silt and water from entering the location of construction equipment, so as to facilitate the discharge of internal water and facilitate the construction of the project site. As the scale of water conservancy projects becomes larger and larger, the flow of water will also increase. The stability of the cofferdam structure is often maintaine...

AI Technical Summary

Problems solved by technology

However, increasing the height of the cofferdam and slowing down the slope of the cofferdam will inevitably increase the cross-sectional area of ​​the cofferdam dramatically, and the volume of the entire structure will also increase sharply, which will increase the amount of cofferdam engineering, which in turn will lead to engineering costs. the rise of

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