›› 2005, Vol. 26 ›› Issue (S1): 121-125.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

3D creep numerical simulation of excavation and support in frozen soil curatin wall of crossing tunnel

LI Fang-zheng1,2, LOU Gen-da2, YU Zhi-song 3, LI Xiao-jun4   

  1. 1. Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China; 2. Beijing Coal Mine Co. Ltd, Beijing 100013, China; 3. Shanghai Tunnel Engineering Corporation, Shanghai 200030, China; 4. Tongji University, Shanghai 200020, China
  • Received:2005-01-17 Published:2005-12-15

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Abstract: The creep property of artificial frozen soil curtain wall is obvious. In the calculating model which is based on the tunnel crossing the bottom plate of using station in Shanghai subway，it is considered that the frozen soil curtain wall is made up of creep media, both soil in tunnel and upper structure are elastic materials, outside soil of the frozen soil curtain wall and structure of station are soil spring. Analysis of time-space effect on excavation and support in frozen soil curtain wall of tunnel is made by 3D FEM- MARC. The calculation results are in good agreement with the test values; so it shows that it is reasonable and creditable to analyze the time-space effects of frozen soil curtain wall by 3D FEM. Moreover, the stabilities of the bottom plate of station, frozen soil curtain wall and the structure of support are increased by decreasing the exposed time of the frozen soil curtain wall and applying the way of step-by-step excavation.

Key words: creep, frozen soil curtain wall, time-space effect ;excavation and support, numerical simulation

CLC Number: 

  • TV 64
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