地震荷载与预应力值对压力型锚索锚固效果的影响

Impact of seismic load and prestress value on effect of pressure type anchor cable

为进一步研究压力型锚索锚固机理,通过FLAC3D软件数值模拟分析了地震荷载与预应力荷载对压力型锚索锚固效果的影响。研究结果表明:在预应力荷载和地震荷载共同作用下,地震初期预应力荷载对锚索孔周边岩体应力的影响较小,地震中后期预应力荷载对锚索孔周边岩体应力基本无影响;不同强度的地震荷载对锚索孔周边岩体的应力影响比较大。

The impact of seismic load and pre-stress load on effect of pressure type anchor cable were analyzed by numerical simulation with FLAC3D to further study the anchorage mecha- nism of the pressure type anchor cable . The research indicated that the pre-stress load had little influence on the dynamic stress of the rocks surrounding pressure type anchor hole in the early period of seismic load and almost had no effect on it in the middle and late periods of seismic load. The seismic load with different intensities had a significant effect on the dynamic stress of the rocks surrounding pressure type anchor hole.