Multi-field coupling effect of deep excavation under the stress path of unloading
Multi-field coupling effect of deep excavation is investigated under the stress path of unloading.First, based on two surfaces model, an elasto-plastic model for clay under different stress paths is established.Second, the constitutive model is introduced into the Blot consolidation equations.Then the incremental frame of governing partial differential equations is established to be suitable for this problem.Third, a physical equation for pore water pressure and the fundamental solutions are presented for the plane strain problem.By use of the fundamental solutions, a semi-analytical and semi-numerical method is presented.Fourth, the method has been applied to numerical analyses of consolidation in deep excavation.It is indicated that this method is reasonable, which can reflect the effect of unloading stress path on horizontal displacement, settlement and pore water pressure.
T.Cheng K.Q.Yan X.F.Luo Z.Y.Yu W.H.Xu
School of Civil Engineering, Hubei Polytechnic University, Huangshi, China School of Civil Engineering, Three Gorges University and Technology, Yichang, China
国际会议
The 3rd ISRM Young Scholars Symposium on Rock Mechanics(第三届国际岩石力学青年学者论坛)
北京
英文
403-407
2014-11-08（万方平台首次上网日期，不代表论文的发表时间）