ISSN 2096-4498

   CN 44-1745/U

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Tunnel Construction ›› 2017, Vol. 37 ›› Issue (S1): 107-110.DOI: 10.3973/j.issn.1672-741X.2017.S1.017

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Cutter Replacing Technologies for Shield Based on Hardened Mud Membrane

WU Qiong   

  1. (China Railway 16 Bureau Group Beijing Metro Engineering Construction Co. , Ltd., Beijing 101100, China)
  • Received:2017-03-03 Revised:2017-04-10 Online:2017-05-20 Published:2017-05-27

Abstract:

Water gushing and sand gushing even collapse of working face would be induced by cutter replacing of shield in sandy soil stratum. The sandy soil is grouted by mixed grout of concretesand slurry and bentonite under pressure of soil chamber. As a result, a new kind of mixed mud membrane is formed. The cutter replacing work can be carried out after cleaning of hardened grout in soil chamber. The application of the abovementioned technology to a Metro shield tunnel in Guangzhou shows that the technology is rational and efficient. 

Key words: shield tunnel, cutterhead, cutter replacement, mixed mud membrane, sandy soil stratum

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