基坑开挖与土钉支护的数值模拟

运用FLAC程序对深基坑土钉墙支护设计进行了数值模拟,分析了边壁土体的变形大小和土钉应力分布,并与现场实测结果对比,得出基坑顶的水平位移值与实测值相差不大,并对差值进行了分析。在应力方面,改善了土体内应力集中的现象,从而制约了土体的变形。剪应力在支护结构和坡角处有集中现象,在坡角处较为严重。

Numerical Simulation of the Foundation Digging and the Soil Nail Protection

Using FLAC procedure to dark base hole soil wall support and protect and design numerical simulation, analyzing wall soil deformation size and soil nail stress distribute, surveying the contrast of the result with the scene, and finding that the horizontal deformation of base hole is almost the same to the actual observation. And then we analysis the subtraction of both. In the part of stress, it improves the phenomenon of stress concentration in the soil mass, so it define the deformation of soil mass. The shear stress concentrates in the retaining substructure and the angle of slope, especially serious in the angle of slope.