A reverse construction method for underground structures

Abstract

The invention belongs to the field of underground engineering, and relates to a reverse construction method of an underground structure, comprising the following steps: 1) constructing an enclosure structure, excavating a foundation pit to the position of the structural roof, constructing the structural roof and fixing the roof thereon for suspension 2) Set up a vertical bearing system, and connect the roof suspension system with the vertical bearing system; 3) Continue to excavate to the position of the middle plate of the structure, construct the middle plate of the structure and fix the middle plate suspension system on it; 4) Connect the mid-slab suspension system to the roof suspension system; 5) Continue to excavate to the position of the structural bottom plate, construct the structural bottom plate, and then construct the structural side walls and structural columns under the structural mid-slab; 6) Remove the mid-slab suspension Hanging system, structural side walls and structural columns above the slab in the construction structure; 7) Remove the top slab suspension system. The invention not only solves the problem of high cost of the temporary vertical support frame in the traditional reverse method, but also does not affect the construction of structural components, and can greatly speed up the construction speed and improve the construction quality.

Description

technical field [0001] The invention belongs to the technical field of underground engineering, and in particular relates to an inverse construction method of an underground structure, which can be widely applied to standard stations and section projects in subway engineering that adopt inverse construction. Background technique [0002] The construction methods of underground stations and sections can be mainly summarized as: cut-and-cover method and cover-cut method. The cover and excavation method is divided into two types: cover and excavation forward and cover and excavation reverse. These construction methods have their own applicable conditions and advantages and disadvantages. The conventional method of cover and excavation is to use the structural plate as the support of the foundation pit support, and to take advantage of the very high rigidity in the plane of the structural plate, which can greatly reduce the deformation of the foundation pit and reduce the impact...

AI Technical Summary

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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