Basement staged top-down construction method

Abstract

The invention relates to a basement staged top-down construction method, and belongs to the technical field of construction of the underground structure by a top-down construction method. The construction method comprises the steps that firstly, construction of a vertical force transmission structure and a staged underground diaphragm wall is conducted; steel columns, a storey B1 horizontal structure, a storey B0 horizontal structure and a storey B1 core tube of the basement are constructed by adopting a bottom-up construction method, to form a box body bearing structure; other storeys of thebasement are sequentially constructed by adopting the top-down construction method, and the construction of a shear wall of the core tube of the basement is completed by adopting the bottom-up construction method; and finally, after construction of the second-stage basement is completed, the staged diaphragm wall is disassembled from top to bottom, and connection and communication of horizontal steel beams are completed. The box body bearing structure has good integrity and high rigidity, stress of an overground structure can be smoothly transmitted to the steel columns and cast-in-place pilesbelow the box body bearing structure, the problem of uneven settlement caused by large local pile foundation stress is prevented, and the problems of staged underground diaphragm wall dismantling andhorizontal steel beam extension butt joint are further solved.

Description

technical field [0001] The invention relates to a staged reverse construction method for a basement, belonging to the technical field of underground structure reverse construction. Background technique [0002] The upside-down construction technology of building basements has been widely used because of its two advantages of high safety and time saving, and has a good development prospect. At present, super high-rise buildings are mostly in the form of main building + podium, and the area of ​​the foundation pit is generally large. At the same time, taking into account factors such as site, safety and resources, the foundation pit of super high-rise buildings often needs to be divided into pits and phases by connecting walls in stages construction. After the construction of the basement adjacent to the foundation pit is completed, it is usually necessary to dismantle the enclosure structures such as the underground diaphragm wall in stages, so that the basement structures o...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a basement staged reverse construction method, which solves the problem of B 0 It has the advantages of fast construction efficiency, high construction precision, and low construction cost.

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