›› 2009, Vol. 30 ›› Issue (11): 3267-3272.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Elastoplastic analysis of surrounding rocks of subsea tunnel with consideration of seepage and material softening

WANG Xing-hua1，ZHANG Min1，WANG Sui-xin2   

  1. 1. School of Civil and Architectural Engineering，Central South University, Changsha 410075, China; 2. China Railway 7th Group Co., Ltd., Zhengzhou, 450016, China
  • Received:2008-04-25 Online:2009-11-10 Published:2010-01-07

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Abstract:

Under the condition of seawater seepage and by considering the behaviors of strength reduction for surrounding rock after yielding, that is plastic-softening, the analytical equations for calculating the radius of plastic-softening and plasto-residual zones as well as the displacements around openings are proposed according to the elastic-softening- residual plastic triple linear stress strain model. By comparing with other two situations, one is considered seepage only, the other one is considered non-seepage and non-softening, it demonstrates softening is more disadvantaged to the stability of surrounding rocks. The influences of different softening extents on the results are also analyzed. The results provide a theory base for stability analysis of surrounding rocks and engineering practice in subsea tunnels.

Key words: subsea tunnel, surrounding rocks, seepage, strain-softening

CLC Number: 

  • U 451
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