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分析不连续边界形状下土体中不连续应力场和速度场特征,根据应力不连续线和速度不连续的性质,在考虑有重土、土和墙体摩擦情况下,同时利用上、下限定理,构建算法;通过数值计算解三类边值问题,求得挡土墙绕基底转动下,墙后不连续边界形状下土体的静力场,同时对对应的机动场进行分析,找出了满足所有速度边界条件和静力边界条件的应力场,得到绕墙基转动下挡土墙土压力的严密解。算例表明:求解极限平衡问题真解的算法是可行的。
Based on the discontinuous stress discontinuities and the discontinuous nature of the velocity, the discontinuous stress field and velocity field in the soil under discontinuous boundary shape are analyzed. Taking into account the friction of heavy soil, soil and wall, the upper and lower bound theorems , And the algorithm is constructed. By solving three types of boundary value problems numerically, the static field of the soil under discontinuity boundary is obtained, and the corresponding maneuvering field is analyzed. The stress field satisfying all velocity boundary conditions and static boundary conditions is obtained, and the compact solution of earth pressure on the retaining wall rotating around the foundation is obtained. The example shows that it is feasible to solve the true solution of limit equilibrium problem.