压力型锚索孔周边岩体动态响应的数值模拟分析  

Numerical simulation analysis on dynamic response of rock surrounding pressure anchor cable hole

作　　者：叶红[1] 陈燕平[1] 

机构地区：[1]武汉交通职业学院交通工程学院,湖北武汉430065

出　　处：《化工矿物与加工》2016年第6期58-62,69,共6页Industrial Minerals & Processing

基　　金：国家自然科学基金面上项目(51374163);湖北省自然科学基金面上项目(2014CKB499);湖北省教育厅科学技术研究项目(B2015337)

摘　　要：为了精确地深入研究压力型锚索的动态响应,利用FLAC3D软件建立了锚索孔周边岩体力学参数梯度变化的压力型锚索体系模型,数值模拟了地震荷载作用下压力型锚索孔周边岩体的动态应力,研究了垂直锚索孔壁的距离和沿注浆体轴向方向距离承压板的位置对锚索孔周边岩体的压应力和剪应力时程分析的影响。研究结果表明垂直锚索孔壁的距离和沿注浆体轴向方向距离承压板的位置对锚索孔周边岩体的压应力时程曲线和剪应力时程曲线影响比较大。研究结果丰富了压力型锚索锚固机理的动态响应内容,可为优化边坡工程中压力型锚索体系的抗震性能分析提供参考。A model of pressure anchor cable system with the gradient change of mechanical parameters of rock surrounding pressure anchor cable hole was built by FLAC3D to accurately study the dynamic response of pressure type anchor cable. The dynamic stress of the rock surrounding pressure anchor CABLE hole were numerically modeled under seismic load and the effect of distance of vertical anchor hole walt and distance of bearing plate along the axial direction of grout on the pressure time procedure and the shear stress time procedure were studied. The results showed that distance of vertical anchor hole wall and distance from bearing plate along the axial direction of grout had a significant effect on the pressure time procedure and the shear stress time procedure of the rock surrounding pressure anchor cable hole. The results enriched the dynamic content of the pressure anchor cable system mechanism and provided a reference for analysis of seismic performance of the pressure anchor cable system in optimization of slope engineering.

关 键 词：压力型锚索 动力响应 抗震性能 梯度变化 力学性质 

分 类 号：TD350.1[矿业工程—矿井建设]