ISSN 2096-4498

   CN 44-1745/U

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Tunnel Construction ›› 2010, Vol. 30 ›› Issue (S1): 138-144.

• wenzhang • Previous Articles     Next Articles

3D Numerical Analysis on Ground Surface Settlement Induced
by Shield Boring of Overlapping Tunnels: Case Study on WenGen
 Running Tunnel on Line 1 of Hangzhou Metro

 DIAO  Jun1, LI  Yuan-Hai2   

  1. 1. The 3rd Engineering Co., Ltd. of China Railway Tunnel Group; Shenzhen 518052, Guangdong;
    2.The School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083
  • Received:2009-12-14 Revised:2010-04-26 Online:2010-08-14 Published:2010-08-25

Abstract:

WenGen running tunnel on line 1 of Hangzhou Metro is an overlapping tunnel. The ground surface settlement and the uplift/settlement of the tunnel induced by the tunnel construction (including two options, i.e., option 1: boring the upper tube first; option 2: boring the lower tube first) are simulated by FLAC software. The transverse influence scope of the ground surface settlement, the limit values of the ground surface settlement, the final settlement value of the upper tube in case of option 1 and the final uplift value of the lower tube in case of option 2 are analyzed. In the end, option 2 is adopted in accordance with the study results.

Key words: overlapping tunnel, shield tunneling method, 3D numerical analysis, FLAC3D, ground surface settlement