全高刚性直立面板型加筋砂土挡墙极限承载力的影响因素敏感性分析

基于传统的塑性极限分析上限定理，利用序列二次规划法（SQP），分别计算了筋材铺设长度、筋材拉力、加筋层数、砂土内摩擦角、砂土重度、挡墙高度共6 种影响因素作用下具有全高刚性直立面板型加筋砂土挡墙的极限承载力。根据正交分析方法，给出了各个因素的敏感性顺序。结果表明:加筋层数和筋材拉力对加筋砂土挡墙极限承载力的影响最为显著。因此，选用高强度加筋材料并加密布筋间距（即增大加筋层数），是提高全高刚性直立面板型加筋砂土挡墙承载力的有效措施。

Analysis on Sensibility of Factors Affecting Ultimate Bearing Capacity of Reinforced-sand Retaining Wall with Full-height Rigid Faring

Based on traditional limit analysis plasticity theory，ultimate bearing capacity of reinforced-sand retaining wall with full-height rigid facing under the action of six factors，laying length and tensile force of reinforcement，number of reinforced layer，internal friction angle and unit weight of sandy sand，and facing height，are calculated by use of nonlinear sequential quadratic programming（SQP）algorithm；and by means of orthogonal analysis，the sequence of the above factors sensibility is set out.The result shows that the number of reinforced layer and tensile force of reinforcement influence the ultimate bearing capacity to a most obvious extent，hence，selecting high strength reinforcement material and decreasing the space between reinforcement（namely increasing the number of reinforced layer）are effective measures to raise the bearing capacity of reinforced-sand retaining wall with full-height rigid facing.