Reverse construction method of underground structure

Abstract

The invention belongs to the field of underground engineering, and relates to a reverse construction method of an underground structure. The method comprises the following steps of 1) constructing an enclosure structure, excavating a foundation pit to the position of a structural top plate, constructing the structural top plate, and fixing a top plate suspension system on the structural top plate; 2) erecting a vertical bearing system, and connecting the top plate suspension system and the vertical bearing system; 3) continuously excavating to the position of a structural middle plate, constructing the structural middle plate, and fixing a middle plate suspension system on the structural middle plate; 4) connecting the middle plate suspension system and the top plate suspension system; 5) continuously excavating to the position of a structural bottom plate, constructing the structural bottom plate, and then constructing a structural side wall and a structural column below the structural middle plate; (6) dismantling the middle plate suspension system, and constructing a structural side wall and a structural column above the structural middle plate; and (7) dismantling the top plate suspension system. According to the method, the problem that a temporary vertical supporting framework in a traditional reverse building method is high in cost is solved, construction of structural components is not affected, the construction speed can be greatly increased, and the construction quality is improved.

Description

technical field [0001] The invention belongs to the technical field of underground engineering, and in particular relates to an upside-down construction method for underground structures, which can be widely used in standard stations and section projects constructed by upside-down methods in subway engineering. Background technique [0002] The construction methods of underground stations and intervals can be mainly summarized into two types: open-cut method and cover-excavation method. The cover-excavation method is divided into two types: cover-excavation method and cover-excavation method. Each of these construction methods has its applicable conditions, advantages and disadvantages. The conventional cover-excavation method is to use the structural slab as the support of the foundation pit support, and take advantage of the very large in-plane rigidity of the structural slab, which can greatly reduce the deformation of the foundation pit, and at the same time reduce the i...

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Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art mentioned above, the object of the present invention is to provide an upside-down construction method for underground structures, which not only solves the problem of high cost of the temporary vertical support frame of the traditional upside-down method, but also does not affect the construction of structural components. Doing it can also greatly speed up the construction speed of reverse engineering and improve the quality of engineering construction

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