典型高陡边坡高位地质灾害调查及评估

高陡边坡顶部往往难以通达，高位灾害体的判识评估是灾害防治中的难点问题。本文针对某典型高陡边坡，采用无人机低空摄影辅助调查，查明了陡坡危岩体和坡顶变形体地质特征；应用数码摄影测量技术，获取了边坡岩体结构和灾害体几何特征等信息。通过潜在失稳岩体稳定性分析，失稳岩体运动轨迹、冲击能量分析，评价边坡地质灾害危险性；桥梁、路基、棚洞3种构造物型式易损性和灾害发生后经济损失分析表明，棚洞结构最优，若采用其他结构需对边坡主动加固。

HIGH POSITION GEOLOGICAL DISASTER INVESTIGATION AND EVALUATION OF TYPICAL HIGH-STEEP SLOPE

The top of the high-steep slope are usually arduous and unreachable, the identification and evaluation of high position geological disaster are the difficult problem in the disaster prevention. Based on a typical high and steep slope and aided by the unmanned aerial vehicle photograph, to identify the geological characteristics of potential unstable rock mass and deformation rock mass on the top part of the steep-slope. Digital photogrammetry technology were used to obtain the information of the rock mass structure and the geometric characteristics. Studied the stability of the potential unstable rock mass, trajectory of the falling rock mass and the impact energy, then the slope geological hazard were evaluated. Vulnerability analysis and economic loss calculation after disaster of the three types of structures, such as bridge, subgrade, shed tunnel, showed that the shed tunnel is the best, and if the other structures are used, it is necessary to reinforce the slope.