Deep-buried station structure excavated step by step through tunnel-first station-later and arch-first wall-later method and underground excavation construction method of deep-buried station structure

Abstract

The invention relates to a deep-buried station structure excavated step by step through a tunnel-first station-later and arch-first wall-later method and an underground excavation construction methodof the deep-buried station structure. The arch-first wall-later step-by-step excavation steps are adopted, firstly, the upper portion of a station is subjected to two-side pilot tunnel construction, acover arch structure is constructed in time, and then a side wall structure and an inverted-arch structure are constructed in time. According to the construction method, it is ensured that in the construction process of the underground excavation construction method, a TBM continues to move forward for tunnelling construction, the construction period of the interval is ensured, the structural safety is ensured, and the engineering construction cost is saved.

Description

technical field [0001] The invention relates to the technical field of underground engineering construction, in particular to a deep-buried station structure and an underground excavation method in which the tunnel is first excavated, the station is first arched, and the wall is excavated step by step. Background technique [0002] TBM mechanical construction has the advantages of low environmental pollution, fast excavation speed, and regular shape of caverns. Generally, TBM can continuously excavate multiple sections to greatly shorten the construction period of the section. The construction period of underground excavation stations is long. How to ensure underground excavation The construction of the station does not affect the continuous excavation and slag feeding of the TBM, which is the primary problem to be solved by the innovative construction method of the underground excavation station. [0003] If the station adopts the conventional double-side-wall pilot pit met...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a deep-buried station structure and excavation method in which the tunnel is first followed by the station, the arch and the wall are excavated step by step, which avoids the influence of the construction period of the underground excavation station on the TBM excavation period, and solves the problem of TBM passing through the station. The problem of interaction between slag discharge and earthwork excavation of the main body of the station ensures structural safety and saves project cost

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