A theoretic displacement solution of elastoplastic deformation for the tunnel in soft rocks is derived from the fundamental equations of the axisymmetrical plane strain, elastoplastic problem.

• 从轴对称平面应变问题的基本方程出发，导出了软岩巷道弹塑性变形的位移理论解答，并给出了现有应力与位移理论解的适用条件。