复杂地层泥水盾构开仓换刀施工技术研究

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Abstract Research purposes: There are many uncertainties in opening compartment and changing cutleries of the slurry shield in water － rich sand layer，and the technologies of the opening compartment and changing cutleries are not mature enough． In this paper，the construction process and the technical parameters about the opening compartment of the shield in actual construction in the complex stratum are summed up for providing the reference and basis to the further research on the technologies for opening compartment and changing cutleries of the shield and to the similar works．

Research conclusions: From the research on the technologies for opening compartment and changing cutleries of the shield in the complex stratum，it is concluded the clay membrane with the average thickness above 5cm must cover the entire soil of the working face． The feeding and compressing compartment must be done step by step at the same time． The pressure should be reduced step by step． The pressure needed for forming the clay membrane should be bigger than the cutting pressure by 0． 5 bar．

Key words： slurry shield water － rich sand layer opening compartment and changing cutleries clay membrane

Received: 28 August 2012

PACS:

U445

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http://tdgcxb.crec.cn/EN/ OR http://tdgcxb.crec.cn/EN/Y2013/V30/I3/62

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