不同土性下L型挡墙结构内力研究及程序研发

运用有限元法对L型挡土墙在不同土性的填土情况下，分层逐级填筑进行模拟，重点分析了填料强度对墙体内力影响的分布规律，对比了有限元分析结果和传统理论计算结果的异同。结果表明:墙后填料无论是砂性土还是粘性土，墙后土体单元均未达到传统理论意义上的整体极限平衡状态，说明目前以现行规范来设计此混凝土结构挡土墙是能满足构件结构受力要求，并具备一定的安全储备，针对L型挡土墙设计研发了一套计算机辅助设计系统，该系统已在EPC项目中得到了成功应用。

Study on Structural Internal Force in L-type Retaining Wall under Different Soil Properties and the Program Development

The filling of L-type retaining wall in layers with the soil having different properties was simulated by finite element method (FEM), with the emphasis laid on the law that how the effect of the strength of the fill on the internal force distributes inside the wall and the comparison carried out between the results obtained from the FEM and the traditional theoretical calculation. The results show that in relation to the back fill, regardless of sandy or clay, the soil units there do not reach, in the sense of traditional theory, the state of ultimate equilibrium as a whole, demonstrating that the concrete structure retaining wall designed according to the current code could meet the requirement of force on the structure and has certain safety stock; in addition, a set of CAD system aiming at L-type retaining wall is developed, which has been successfully applied in the EPC project.