Pre-embedding construction method for embedding top plate of cover-excavation top-down structure into underground diaphragm wall

Abstract

The invention discloses a pre-embedding construction method for embedding a top plate of a cover-excavation top-down structure into an underground diaphragm wall. The construction method comprises the following steps that a bottom plate of a wooden box structure is arranged in a corresponding position of a vertical main reinforcement of a reinforcement cage in a penetrating manner, a square timber framework device is transversely fixed on the vertical main reinforcements, and the bottom plate and the square timber framework device are connected and fixed; outer side plates of the wooden box structure are installed on the outer sides of the vertical main reinforcements, and the outer side plates are fixedly connected with the square timber framework device; the top plate of the wooden box structure is arranged at the corresponding positions of the vertical main reinforcements in a penetrating mode; the left side plate and the right side plate of the wooden box structure are arranged on the transverse main reinforcements of the reinforcement cage in a penetrating mode; the positions of the formworks of the wooden box structure are adjusted, the formworks of the wooden box structure are sequentially fixed to form the closed wooden box structure, and transverse main reinforcements and the vertical main reinforcements are fixedly connected to form a reinforcement cage; and a reinforcement cage is hoisted, the underground diaphragm wall is constructed, the wooden box structure and the square timber framework device are dismantled, and a top plate structure is constructed.

Description

technical field [0001] The invention relates to the technical field of subway station construction by the cover-dig reverse method, in particular to a pre-embedded construction method in which a cover-dig reverse structure top plate is embedded in a ground connecting wall. Background technique [0002] With the development of the country, the ultra-deep cover-and-excavation method of subway construction is becoming more and more common in urban central areas or important traffic areas. The cover-and-excavation enclosure structure generally adopts the form of ground connection wall, and the roof of the cover-excavation structure is embedded in the ground connection wall design. It is becoming more and more common, and the amount of work to remove the concrete at the embedded part is large, and the construction time is long, which has a great impact on the safety of the structure and the surrounding environment. [0003] The cover-excavation reverse structure is embedded in th...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a pre-embedded construction method in which the top plate of the cover-excavation structure is embedded in the ground connection wall according to the above-mentioned deficiencies in the prior art. The box structure effectively solves the problem of concrete chisel removal in this part

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