基于三维激光扫描技术的岩体抗剪强度参数获取

为了解决在高陡地形条件下难以获取岩体抗剪强度参数的问题,应用三维激光扫描技术得到斜坡岩体结构面几何参数(倾向、倾角、间距、迹长),并结合结构面网络模拟技术生成结构面网络图,使用投影法计算不同剪切方向的连通率,最后计算岩体抗剪强度参数。研究表明:斜坡临界连通率往往在接近优势结构面倾角的剪切方向附近出现;该方法的计算结果与规范法和RMR法的结果均较为吻合,并具有较强的可操作性和实用性。

Obtaining shear strength of rock mass based on 3D laser scanning technique

In order to cope with the difficulty of obtaining shear strength of rock mass in high and steep slopes, we use 3D laser scanning technique to collect geometric parameter of rock discontinuity (inclination, dip angle, spacing, length) and further apply the technology of rock discontinuity network simulation to calculate connectivity rate of rock mass by projection method. Then the shear strength of rock mass was obtained. The results show that the critical connectivity rate usually appears along the shear-direction of dip angle of preferred plane. The result is close to the result obtained by specification method and RMR. This method is operable and practical.