Underground space subsurface excavation construction method adopting combined roof

Abstract

The invention provides an underground space subsurface excavation construction method adopting a combined roof, which comprises steps: a proposed underground space is divided into a plurality of spaced channels, first metal plates which are higher than the top ends of the channels are arranged above space positions of the adjacent channels through a traction method, pipe joints which are provided with embedded grouting pipes are arranged in the channels through a pipe jacking method, metal frame units are arranged on top plates of the pipe joints, waterstop coating is injected between the top plates of the pipe joints and the first metal plates through the embedded grouting pipes, adjacent side plates of the pipe joints arranged on adjacent channels and soil bodies between adjacent side plates are removed, the top plates which are arranged on the pipe joints of the adjacent channels are connected through second metal plates, support units are arranged in the channels, concrete is casted in the top plates of the pipe joints, reinforced concrete is casted on bottom plates of the pipe joints, and reinforced concrete is casted on the side plates of the pipe joints which are arranged on the channels of the two sides of the underground space. The underground space subsurface excavation construction method adopting the combined roof reduces construction cost, guarantees construction quality, and is simple in construction method and rapid in construction efficiency.

Description

technical field [0001] The invention belongs to the technical field of underground space development and construction, and mainly relates to an underground space excavation construction method using a composite roof. Background technique [0002] For cities, the contradiction between the expansion of urban space and the increasing shortage of urban land resources is becoming more and more prominent. In order to effectively use the existing urban space, people have developed underground space. Underground excavation construction method refers to the construction method of directly excavating inside the foundation soil in urban construction projects without digging from the ground. [0003] When excavating and constructing underground spaces under existing facilities such as urban green spaces, squares, roads, and pipelines, on the one hand, limited by the height of the underground space, the operating space and height of the roof concrete pouring construction are limited, and...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an underground space excavation construction method using a composite roof to solve the problems of poor construction quality and reliability, slow construction efficiency and high construction cost of existing underground excavation construction methods

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