›› 2009, Vol. 30 ›› Issue (2): 497-502.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Analysis of influence of dismantling temporary supports on preliminary lining of large-span shallow tunnel

ZHANG Jian-guo, WANG Ming-nian, LUO Lu-sen, JI Yan-lei   

  1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
  • Received:2007-05-15 Online:2009-02-10 Published:2011-01-27

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Abstract:

In view of the influence of dismantling temporary supports of large-span shallow tunnel on the preliminary lining, we have employed two ways, in-situ monitoring and numerical simulation, in the phase of Xiamen East Passageway (Xiang-an tunnel) constructed by CRD method. The results turned out to be perfectly matched by comparison and analysis. The research indicates that when the one-time longitudinal dismantled length is 10 metres, the settlement of vault has a 5 %－10 % drop while the safety factor of preliminary lining is about 5 %－15 % lower. In addition，removing the temporary supports has little impact on the safety of the preliminary lining. As a result, this study provides evidence for information-oriented construction of tunnel as well as experience for the future related projects.

Key words: large-span, dismantling temporary supports, security, in-situ monitoring, numerical simulation, information-oriented construction

CLC Number: 

  • U 451
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