土钉支护及其FLAC数值模拟

土钉支护结构以其施工便捷、经济和支护效果好等诸多优点 ,在当前的基坑工程中得到越来越广泛的应用。本文应用FLAC程序对新北京故事 4号住宅楼的基坑开挖和土钉支护进行了数值模拟 ,通过和无支护基坑边坡比较 ,着重对基坑开挖和土钉支护过程中的土体位移场、应力场和土钉的受力变化进行分析 ,对土钉支护工作机理进行初步研究 ,得到基坑边坡变形和受力以及土钉受力的规律。最后结果表明应用FLAC程序对基坑土钉支护的数值模拟是可行的 ,从分析得到的基坑边坡位移场、应力场和土钉的应力分布规律 ,与理论分析基本吻合

SOIL NAILING WALL AND IT'S NUMERICAL ANALYSIS

With such advantages as easy to construct,economical effect and nice purpose of shoring,Soil nailing wall has been widely used in the shoring of foundation pit.This paper carries out a numerical analysis with FLAC(Fast Lagrangain Analysis of Continua)program by taking a real project.By contrast with foundation pit without shoring,this pager emphatically analyzes the displacement and stress of the foundation pit shored with soil nail and mechanical characteristic of soil nail.Through the comparative analysis in stress and deformation,some laws about the stress and displacement distribution are acquired.Compared with the data measured in the project locale,the results of the numerical simulation are accordant on the whole,and this kind of method is rational and applicable for soil nailing wall.