Sandy soil cofferdam system used in still water drainage basin and construction method thereof

Abstract

The invention provides a sandy soil cofferdam system used in a still water drainage basin. The sandy soil cofferdam system used in the still water drainage basin comprises a sandy soil cofferdam and soil non-diffusion mechanisms. The sandy soil cofferdam comprises a soil cofferdam body, a two-cloth one-membrane and soil bags. The water side of the soil cofferdam body is covered with the two-clothone-membrane. The outer side of the two-cloth one-membrane is covered with the soil bags. The soil non-diffusion mechanisms are arranged on the upstream and downstream of the sandy soil cofferdam correspondingly. Each soil non-diffusion mechanism comprises an antifouling curtain, a buoy, suspension dropping bodies and counter weights, wherein the two opposite ends of the antifouling curtain are fixed to the two banks of a river channel; the buoy is mounted on the top of the antifouling curtain; the suspension dropping bodies are mounted at the bottom of the antifouling curtain; the bottom of the antifouling curtain is spaced from the bottom of the river channel; the counter weights are arranged on the upstream side and the downstream side of the antifouling curtain correspondingly; the counter weights are used for being mounted at the bottom of the river channel and are connected with the top of the antifouling curtain through lifting chains. Through the sandy soil cofferdam system, pollution of soil to water can be reduced during cofferdam construction. The invention further provides a construction method of the sandy soil cofferdam system.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a sandy soil cofferdam system used in still water basins and a construction method thereof. Background technique [0002] In the construction of bridges, the construction scheme of soil cofferdam is often used. The soil cofferdam is used to block water. After pumping water from the foundation pit, the construction on the water is changed to land construction. It has the advantages of simple construction, low cost, and high safety factor. However, the soil part of the cofferdam will It will cause a certain degree of short-term pollution to the water quality, making the water quality near the cofferdam more turbid. For urban landscape rivers in still water basins, the water flow is slow, which makes the negative impact of soil pollution more prominent. In particular, when sandy soil is used for the cofferdam, the sandy soil has poor stability and is easily washed ...

AI Technical Summary

Problems solved by technology

In particular, when sandy soil is used for the cofferdam, the sandy soil has poor stability and is easily washed away by water flow, resulting in large areas of water turbidity

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