深基坑预应力锚索支护对临近既有建筑影响的数值分析

通过利用Ansys有限元软件对某基坑的开挖过程进行数值模拟,对预应力锚索桩支护体系对既有建筑物基础的影响进行了分析,并且与锚索不施加预应力的情况进行了对比,得出了锚索施加预应力可以减小既有建筑物的地基两侧的变形差。但是锚索倾角太小或锚固段完全位于建筑下方,会降低锚索的预期效果,有可能导致建筑物开裂。所以应考虑锚索的倾角和锚固段的位置对建筑的影响。

Numerical Analysis of the Response of Buildings Close with Deep Foundation Pit as a Result of the Prestress Anchor

This article makes some numerical analysis of the digging of deep foundation pit by Ansys and some analysis of the response of buildings close with deep foundation pit as a result of the prestress anchors and stakes.By comparing the in- stances of anchors with stress and without it,the result shows that the anchor with stress is better for reducing the distortion of the groundsill.But we must pay attention to the angle and the position.Otherwise it will reduce the effect of the anchors and cause some cracks in the building when the angle is small and the position to fix is under the building.