中文摘要：

岩质高边坡稳定性分析对于下穿公路及建筑的安全起着至关重要的影响。通过运用关键块体理论,结合先进的非接触测量技术与Geo SMA-3D系统,对益阳东部新区外环路建设项目K3＋300—K3＋340坡段高边坡稳定性进行了比对分析。通过比对不同边坡坡角下,整体稳定性系数的变化与关键块体的体积发现：在一定范围内,边坡的整体稳定安全系数随着坡脚的变大而变小;搜索到的关键块体数量随着边坡坡脚的变大而减少,当坡脚小于60°时,边坡整体较安全;当坡脚大于60°时应该适当考虑后期分级支护及边坡的削坡问题。

英文摘要：

The stability analysis of high rock slope plays an important role in the safety of highway and building.Based on the key block theory this paper combined with the advanced non-contact measurement technology and Geo SMA-3 D system of Yiyang eastern new construction of the outer ring road of K3 ＋ 300—K3 ＋ 340,and compared and analyzed the slope stability of high slope by comparing different slope angle,the overall stability coefficient and the change of key block size found. In a certain range,with the overall stability safety factor of the slope decreases,the number of key block search to decrease as the slope becomes larger,when the slope is less than 60,the overall slope is safe,when the slope is greater than 60 should be appropriate to consider the late support in grade and slope cutting slope problems.