COMPARISON OF ENERGY DISSIPATION ANALYTICAL METHODS FOR CAVITY EXPANSION CONSIDERING LARGE DEFORMATION AND VOLUMETRIC CHANGE IN SAND SOIL UNDER HIGH STRESSES
Abstract：According to Mohr-Coulomb failure criterion，the stress-strain-volume change relationships，the volume balance and energy conservation equations，and the rules of large deformation and non-associated flow under high stresses， the limit bearing capacities of cavity expansion are given considering the large deformation and dilation with volumetric change and large deformation，respectively. The developed theory considering the large deformation agrees with the results of in-situ test，which can give reasonable results than those of theory considering the volumetric change. Furthermore，as for the influence of the dilation，the limit expansion pressure has nonlinear relationship with the dilation and the shear modulus in sand soil.
