Environment-friendly dismantling construction method for two-layer steel sheet pile and soil core composite cofferdam

Abstract

The invention discloses an environment-friendly dismantling construction method for a two-layer steel sheet pile and soil core composite cofferdam. The method comprises the following steps that a, refuse in a cofferdam field is removed and sub cofferdams are dismantled; b, a service road is removed; c, a cofferdam core soil preserving foundation pit is dug; d, water is retuned to the cofferdam to reach the lake surface elevation; e, a downstream face steel sheet pile is pulled out; f, cofferdam core soil is dug out; g, an upstream face steel sheet pile is pulled out; and h, a fence is pulled out, the lake surface is cleaned, and construction is finished. The method is safe and reliable in construction, high in economic benefit, environmentally friendly and small in pollution on surrounding.

Description

technical field [0001] The invention relates to the field of building construction in water areas, in particular to an environment-friendly demolition construction method of a double-layer steel sheet pile soil core combined cofferdam. [0002] technical background [0003] With the development and progress of society, civilized and environmentally friendly construction is increasingly being advocated. During the demolition of cofferdams in water areas, how to ensure that the surrounding water ecological environment is not polluted during demolition is one of the key issues that need to be considered during the construction process. According to the different composition and structure of the cofferdam, its demolition method can be divided into two categories: blasting method and mechanical demolition method. In the blasting demolition method, since the explosion will generate impact force and splash stones, it will have a greater impact on the surroundings. In the mechanical...

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Problems solved by technology

In the blasting demolition method, because the explosion will generate impact force and splash stones, it will have a great impact on the surrounding area.

In the mechanical demolition method, a large amount of earthwork needs to be excavated and transported, and the spoil needs to occupy land, the construction speed is slow, the construction time is long, and the cost is high

Moreover, it is prone to collapse during excavation and unloading, and there are safety hazards such as falling from heights and mechanical injuries in large-scale mechanical use.

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