Abstract:Based on a case of soil-like cut slope in Zhangjiakou-Shijiazhuang Expressway,local monitoring combined with numerical simulation is adopted in the slope stability analysis. Firstly,according to the in-situ information about layers of earth distribution and thickness of landslide,displacement monitoring points are set up. There are two parts of monitoring system:one is inclinometer to monitor slope¢s deep part displacement,another is level instrument combined with theodolite to monitor slope¢s surface displacement. Monitoring result displays that after mini-typed steel tube grouting,the soil¢s properties are changed,and the displacement of slope approaches to critical sliding value of after excavation once again. The first time sliding is simulated by particle flow code(PFC). Based on the same model after sliding and through recovering parallel bond among particles which are near the sliding surface,the effect of grouting is simulated,and then excavation. Monitoring points in the model show that the displacements show progressive change,and expand to failure finally,demonstrating that slope reaches limit equilibrium state again. It means that measures should be taken in time. Finally,rectangle anti-sliding pile combined with low retaining wall in the toe of slope is adopted to reinforce the slope,which is proven to be rational. Local monitoring combined with numerical simulation analysis method is qualified for dynamic analysis,and it can predict the slope¢s trend pattern in time,which can be applied to middle and mini-scale slope¢s analysis widely.