关键词: 盾构隧道, 大直径泥水盾构, 快速拆机, 盾构存储

Abstract: It is risky and complicated to tear down multiple largediameter slurry shields in a shaft, and the process often takes long time and there isnot enough space for shield storage. Wangjing tunnel in the passenger dedicated line of BeijingShengyang highspeed railway, where 4 largediameter shield machines are desmantled in a same receiving shaft, is set as an example to summarize the preparations and process flow for quick dismantling and to introduce the method of combining shield dismantling and storage. The results show that: （1）The method, assembling the key parts of shield simply, helps to save storage space and decrease maintenance cost, as largediameter shield has low ultilization and long storage time; (2)When multiple largediameter shields need to be torn down and stored in the same shaft at downtown, it is better to assemble them again in storage area so as to achieve quick dismantling and sitetransfer. 

Key words: shield tunnel, slurry shield with largediameter, quick dismantling, shield storage