Embedded connection structure and construction method of enclosure wall and middle slab in cover-excavation operation

Abstract

The invention discloses an embedded connection structure of an enclosure wall and a medium plate for a cover and excavation top-down method as well as a construction method of the embedded connection structure. The embedded connection structure comprises the medium plate, an envelope enclosure continuous wall cast around a foundation pit and a main body structure side wall arranged between the medium plate and the envelope enclosure continuous wall, wherein a circle of continuous wall groove is formed in the inner side surface of the envelope enclosure continuous wall, and a medium plate tenon is arranged on the side surface of the medium plate and embedded into the continuous wall groove. According to the embedded connection structure of the medium plate tenon and the continuous wall groove, self-weight load of the medium plate and construction load on the medium plate are transferred to a foundation through the envelope enclosure continuous wall, and a temporary vertical medium plate bracing at the edge of the main body structure side wall is not required to be built, so that the construction cost is reduced, and the construction period is shortened; meanwhile, the main body structure side wall in the embedded connection structure of the medium plate tenon and the continuous wall groove can adopt concrete self-waterproofing and completely-coated outer waterproofing, the waterproof quality is reliable, and the waterproof effect is good; and the embedded structure connection device of the medium plate tenon and the continuous wall groove is simple in form and convenient to construct.

Description

technical field [0001] The invention relates to the connection type of the enclosure structure and the main structure in the cover-excavation composite structure, in particular to the embedded connection structure between the enclosure wall and the middle plate in the cover-excavation operation, and also relates to the connection between the enclosure wall and the middle plate in the cover-excavation operation The construction method of the embedded connection structure of the middle plate. Background technique [0002] In the construction of underground structures in the central area of ​​the city, when the underground structure is located in an area with heavy traffic and many surrounding buildings, the cover-excavation method is often used for construction. The process of cover-excavation reverse work method is to first construct the enclosure structure (generally adopt continuous wall), vertical force-bearing components (piles, temporary steel columns, etc.), and then ex...

AI Technical Summary

Problems solved by technology

In connection method 2, the temporary steel columns 7 near the side walls need to be used as pile foundations, and after the reverse construction is completed, a row of temporary steel columns 7 near the side walls needs to be cut off. The construction is complicated, the construction period is long and the cost is high.

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