On the basis of the cylindrical cavity expansion theory,the concept of expansion velocity is introduced into the theory.The movement of the plastic boundary b is taken as the scale of time and the stress/strain of any point in the expansion body are described as the functions of the plastic boundary b and the current radius r.By using the spatially mobilized plane(SMP) theory of cohesionless soils in the plane strain condition,non-associated flow rule and considering cohesionless soils,shear dilation,the si...
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