Open cut construction method of underground station

Abstract

The invention discloses an underground station open excavation construction method comprising the following steps that 1, slope excavation is conducted on the ground of a planned-built underground station; 2, prefabricated left and right frame segments are hoisted into an excavation pit and are fixedly assembled in the length direction of the underground station, bilaterally symmetrically arrangedstation lower layer pilot tunnels are formed, then track laying, power supply and communication are completed, thus the station have passing conditions in advance, the left and right frame segments comprise bottom plates, lower side walls, end floors, lower frame columns and end platform plates; 3, center floors, center platform plates and an upper station layer are constructed; and 4, the upperportion of the station is backfilled. Meanwhile the invention further discloses another underground station open excavation construction method. Through the construction method, construction of the underground station is achieved, traffic passing of a tunnel is completed in advance, thus early use of a track line is ensured, the travel needs of people are met, and construction time of the whole underground station is also shortened.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to an open-cut construction method for an underground station. Background technique [0002] figure 1 , figure 2 Shown is the layout of underground station A and track line B. Existing underground stations either adopt full underground excavation or full open excavation. Since full open excavation takes a long time and occupies a large area of ​​urban ground space, the scope of application is very small, so full open excavation construction is mostly used; compared with full open cut construction, the construction efficiency of full open excavation construction is significantly lower. [0003] But no matter which kind of excavation method, it needs to be opened to traffic after the construction of the station is completed. At the same time, since underground stations are often close to surrounding buildings and structures, sometimes even directly below them, various...

AI Technical Summary

Problems solved by technology

Since full open excavation takes a long time and occupies a large area of ​​urban ground space, the scope of application is very small, so full open excavation construction is mostly used; compared with full open excavation construction, the construction efficiency is significantly lower

[0003] But no matter which kind of excavation method, it needs to be opened to traffic after the construction of the station is completed.

At the same time, since underground stations are often close to surrounding buildings and structures, and sometimes even directly below them, various measures need to be taken during construction to reduce the impact on the surrounding environment, which will also lead to slow construction progress

Images