Method for constructing subway station by enlarging and digging shield tunnel by adopting mining method

Abstract

The invention discloses a method for constructing a subway station by enlarging and digging a shield tunnel by adopting a mining method. The method comprises the following steps of: (1) firstly advancing a platform layer tunnel passing through a station by adopting a shield machine; (2) excavating a vertical well to elevation of the platform layer tunnel of the station at one end of the station; (3) constructing along with a tunnel vault and manufacturing a pipe shed, perforating by adopting a large pipe shed advance support and grouting; (4) constructing along with the tunnel vault and manufacturing a sleeve valve pipe, and grouting for complementing and reinforcing; (5) enlarging and digging in the platform layer tunnel by adopting the mining method; (6) dismounting and recovering pipe pieces; and (7) constructing and manufacturing a concrete structure comprising a secondary lining, a platform plate and a rail head wind channel. In the invention, the shield machine participates in construction of the subway station, a cave is firstly excavated, then an underground station is enlarged, excavated and constructed by adopting the mining method, respective advantages of the shield machine and the mining method are fully played, and waste of equipment and underground space resource caused by a special large-diameter shield machine is avoided.

Description

technical field [0001] The invention relates to the technical field of underground construction engineering, in particular to an engineering method for constructing a subway station by adopting a mining method to expand and excavate a shield tunnel. Background technique [0002] At present, the existing domestic subway stations are mainly constructed by the open-cut method and the mining method, and there are cases in foreign countries where special shield structures are used to construct subway stations. in: [0003] The open and cut construction method requires a large area of ​​construction site, and often encounters a series of bottleneck problems such as land acquisition and demolition, greening and relocation of municipal pipelines, traffic deconstruction and environmental pollution, resulting in delays in the construction period. The mining method has many construction steps, slow excavation speed, long construction period, many safety risks and hidden dangers, and h...

AI Technical Summary

Problems solved by technology

[0005] 1) Large-diameter shield machines worth hundreds of millions of dollars must be specially customized;

[0006] 2) The excavation distance of special shield machine is short and the cost of machinery is high

[0007] 3) If a large-diameter shield is used to construct the station and the section tunnel at the same time, since the section of the section tunnel is much smaller than that of the station, the space is seriously wasted;

[0008] 4) If the shield tunneling method is used to only build the station, the shield tunneling machine needs to be started separately, and the excavation efficiency is low

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