Displacement analysis and back-analysis of viscoelastic medium with arbitrary shaped tunnel under quasi 3-dimensional rock stresses
Shibata Yoshihisa; Hirashima Ken-ich; Kabeya Satohiro
Abstract:Time dependent behavior in viscoelastic media with arbitrary shaped tunnel is investigated by use of correspondence principle between elasticity and viscoelasticity. The analytical solutions for stress and displacement are obtained and a back analysis using the above result is shown. Then the viscoelasticity for the ground is adopted to be represented by typical rheology models such as Burgers or Standard model for deviatoric part and Elastic model for volumetric part about stress. Concrete numerical examples are shown by graphical representations. Key Words:viscoelasticity, arbitrary tunnel, quasi 3-dimentional rock stresses, back-analysis