扩大头锚杆-土体相互作用数值模拟与分析

本文应用有限元计算分析软件ABAQUS对扩大头锚杆进行数值模拟分析,较好地展示了扩大头锚杆-土体之间的相互作用。锚杆自上而下逐渐发挥作用,当扩大头段产生竖向位移时,锚杆侧壁摩阻力达到极限值,土体的应力状态不再发生较大变化;扩大头锚杆竖向位移越大,扩大端头附近土体的应力状态变化越大;扩大头直径越大,承载力越大。

In this paper,f inite element analysis software ABAQUS is used to simulate three different diameter anchors,and show the reamed end anchor-soil reciprocity better.Reamed end anchor gradually plays a role top-down.When the expansion section have a vertical displacement,the anchor sidewall friction limit reached,the stress state of soil is no longer changed large;The greater the reamed end anchor vertical displacement is,the bigger the soil stress state near the reamed end changes.