ISSN 2096-4498

   CN 44-1745/U

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Tunnel Construction ›› 2010, Vol. 30 ›› Issue (S1): 172-175.

• wenzhang • Previous Articles     Next Articles

Study on Safety Assessment of Longterm Longitudinal Settlement of
Shielddriven Metro tunnel

LU  Zhi-Feng   

  1. China Railway Siyuan Survey and Design Group Co., Ltd, Wuhan 430026
  • Received:2010-01-27 Revised:2010-03-31 Online:2010-08-14 Published:2010-08-25

Abstract:

A modified model is obtained on basis of the longitudinal equivalent continuous stiffness model by considering the influence of the circumferential joints. The modified model is used to assess the safety of shielddriven tunnels in their longterm operation period. The safety system of the longitudinal safety assessment of tunnels is established. The study results can be used to recommend countermeasures to control the longitudinal deformation of tunnels before they are put into operation and can also be used to assess the safety of the longitudinal deformation of tunnels during their operation stage.

Key words: Metro, shielddriven tunnel, longitudinal settlement, safety assessment