水电工程危岩体数据采集与稳定性分析

水电工程危岩体往往分布于高山峡谷之中，治理方案对地质勘察提出了更高的要求，通过三维激光扫描及数码摄影技术可以获取高陡危岩体的主要边界条件，以查明危岩体的结构面组成、连通情况、规模、主要影响因素等，进而进行危岩体分区及定性评价。根据岩石单轴抗压强度、结构面特征、地面坡度、结构面不利组合、地下水特征、植被覆盖情况等影响因子进行综合评分，进行半定量评价。最后，根据危岩体的破坏模式选取相应的稳定性计算模型进行分析计算，提出定量评价结论，为同类危岩体的勘察及稳定性分析提供一定的参考依据。

Data Acquisition and Stability Analysis of Unstable Rock Mass in Hydropower Project

Unstable rock mass of hydropower projects are usually distributed in high mountains and valleys with steep slopes and large scale,the prevention scheme raise higher requirements for geological investigation,the main boundary conditions of high and steep rock mass can be obtained by 3 D laser scanning and digital photography,which is very helpful to find out the structural plane composition,connectivity,scale and main influencing factors of the unstable rock mass.Subarea and qualitative evaluation of unstable rock mass is analyzed.According to the impact factors of rock uniaxial compressive strength,structural surface characteristics,ground slope,adverse combination of structural surface,groundwater characteristics,vegetation coverage and so on,the comprehensive score was conducted,as well as semi-quantitative evaluation.Finally,according to the failure mode of unstable rock mass,the stability calculation model is selected for analysis and calculation to draw the quantitative evaluation conclusion.This paper could provide some reference for the investigation and stability analysis of similar unstable rock mass.