›› 2009, Vol. 30 ›› Issue (4): 1102-1108.

• Numerical Analysis • Previous Articles     Next Articles

Dynamic simulation analysis of displacement field of bias closely spaced tunnel with altitude difference

DU Ju-hong，HUANG Hong-wei   

  1. 1. China Construction Design International, Shanghai 200235, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
  • Received:2007-07-30 Online:2009-04-10 Published:2011-01-30

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Abstract:

A three-dimensional nonlinear finite element analysis is performed to simulate the observational construction procedure of bias closely spaced tunnels with altitude difference. The main works are focused on the displacement field to investigate the construction mechanics features under alternative construction sequences. The results present more deterioration of adjacent rock for parallel tunnels with small distance than superposition of two independent tunnels because of the interaction; and the interaction effect more on pillar than ground surface and tunnel periphery. Though the construction sequences are different, the basic features of final displacement field are consistent; they are just different in quantity. The preferable construction sequence under the presented condition is given.

Key words: unsymmetrical pressure, closely spaced tunnels, mutual influence, 3D numerical simulation

CLC Number: 

  • U 25
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