在对基岩顺向滑坡进行详细工程勘查的基础上,利用地表GPS位移监测技术,分析监测数据蕴含的坡体稳定性信息,研究坡体的变形趋势,监测数据显示:强变形区I内,滑坡处于持续变形状态,不同部位变形速率存在差异,局部区域住移速率呈上升趋势;暴雨和极端降雨等不利工况下,滑坡变形加剧,位移普遍呈现指数型增长。对处于持续变形的坡体,运用Geo—studio软件进行稳定性校棱,计算结果表明:实测水位下,三个计算剖面坡体安全系数满足要求,坡体处于较稳定状态;降雨条件下,存在不稳定滑动面,部分坡体处于欠稳定状态。通过变形监测和稳定性分析,为坡体的稳定性评价以及采取相应的坡体防护措施提供了依据。
On the basis of the detailed engineering survey of the bedrock landslide, the slope stability information contained in the monitoring data was analyzed by GPS displacement monitoring technology. And the deformation trend of slope was studied. The monitoring data showed that at the strong deformation zone NO. I , the landslide was in a state of continuous deformation, there were differences on deformation rates among different sites, and the displacement rate of local areas had a rising trend. At the adverse conditions such as heavy rain and extreme rainfall, the landslide deformation intensified and the displacement gener- ally presented exponential growth. Aimed at the slope with continuous deformation,Geo-studio software was used to check and adjust the landslide stability. The calculation results showed that at the measured water level, the slope safety factors of the three calculation sections satisfied the requirements and the slope was in a stable state. Under the rainfall condition, there were unstable landslides, and some slopes were in a slightly unsteady state. It provided a reference for the slope stability evaluation and taking the corresponding protection measures over the slope by the analysis of deformation monitor and stability.