›› 2007, Vol. 28 ›› Issue (S1): 531-535.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Three-dimensional numerical simulation of construction for bias closely spaced tunnels with altitude difference

DU Ju-hong, HUANG Hong-wei   

  1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
  • Received:2007-05-31 Online:2007-10-25 Published:2014-03-28

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Abstract: Taking Pingnian Tunnel in Yunnan, which is the bias closely spaced and shallow twin tunnel with altitude difference in two tunnels and constructed by using NATM, as the engineering background and applying MARC finite element software, non-linear three dimensional numerical simulation of construction process under different lagging distance between the twin tunnel excavated faces is performed. It is found that the change of the excavated face distance has a stronger influence on the horizontal displacement than on the vertical displacement of each tunnel, and especially for the left tunnel. Longer of excavated face distance is, smaller displacements at tunnel periphery and pillar is larger than the ground surface settlement in the special area , and more deteriorative for some zone.

Key words: unsymmetrical loadings, 3D numerical simulation, NATM, excavated faces distance

CLC Number: 

  • U 451
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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