水平旋喷拱棚承载特性及破坏机理的有限元分析

基于水平旋喷拱棚的原位荷载试验成果,利用试验数据对有限元分析结果进行验证,表明有限元计算结果是可信的。在此基础上,对水平旋喷拱棚在外部荷载作用下的塑性变形和破坏面的形状进行计算分析,结果表明:拱棚的塑性变形首先出现在水平旋喷所成的水泥土桩体结合处,随外部荷载的增大,塑性变形区域在水泥土桩体结合处逐渐扩展并最终形成一个贯通的塑形区。

FINITE ELEMENT ANALYSIS OF BEARING CAPACITY AND FAILURE MECHANISM OF HORIZONTAL JET GROUTING ARCH

The in-situ loading test was performed and the experimental data were used to verify the computational results from the finite element methods,which showed that the finite element program was reliable.By virtue of numerical analysis,the failure process can be reproduced.It is found that the plastic strains firstly appear on the junctions of cement mixing piles by horizontal jet grouting.With increasing of the load,the plastic zone expands and joints together at last.