Rapid low-risk station tunnel digging method

Abstract

The invention discloses a rapid low-risk station tunnel digging method. Positions of a main construction channel and an auxiliary construction channel are determined according to a station, and station digging and supporting are conducted through four steps, namely conversion between the main construction channel and a station connection segment, digging and supporting of pilot tunnels in the station, conversion between the auxiliary construction channel and the station connection segment and digging and supporting of the station. According to the rapid low-risk station tunnel digging method, the position relation between the main construction channel and the station is adjusted, the station construction steps are adjusted, and the conversion method between the auxiliary construction channel and the station connection segment is changed, so that construction difficulty and risk of station tunnel digging are effectively lowered, the number of temporary supports is reduced, the engineering cost is lowered, and the construction period is shortened.

Description

technical field [0001] The invention relates to a construction method for building tunnels, in particular to a fast and low-risk station tunnel excavation method. Background technique [0002] The rapid development of modern cities has led to more and more urban traffic congestion, so it is an inevitable requirement for many large cities and megacities to vigorously develop public transportation, especially rail transportation. For the construction of underground rail transit, in order to avoid more congestion of ground traffic during the construction process and save urban space resources, more and more subway stations are constructed by underground excavation. For example, Shapingba Station, Fengtian Road Station, and Erlang Station of the Chongqing Rail Transit Ring Line. Construction of subway stations using underground excavation method requires the use of underground excavation construction passages to enter the subway station. According to the existing design documen...

AI Technical Summary

Problems solved by technology

At present, the transition section between the auxiliary construction channel and the station usually adopts the method of converting from the footage of the auxiliary construction channel to the station expansion and excavation conversion. This method is difficult to construct, consumes more temporary supports, is more risky, and has a longer construction period.

It can be seen that the existing construction methods for the main and auxiliary construction passages entering the station tunnel all have problems such as complicated conversion procedures, high risks, high consumption of temporary supports, and lagging construction period. The risk also seriously affected the construction progress of the subway and raised the project cost

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