RESEARCH ON DESIGN METHOD OF SLOPE REINFORCED BY PILE-ANCHOR COMBINATION

The combined structure of anchor cables and stabilizing piles is the main measure for slope reinforcement. In reinforcement design, the traditional safety factor cannot reflect the influence of seismic wave types. This paper aims to accurately evaluate the stability of the slope and carries out the research on the performance design method. Based on the limit analysis method, the displacement formula of stabilizing pile is derived. The difference between far and near field seismic waves is compared under the framework of vulnerability. The results show that: (1)Introducing the nonlinear model into the Newmark method can realize the real-time update of the anti-sliding force. (2)Considering the randomness of seismic loads, the performance-based design method is more reasonable. The fragility curve can be used to quantitatively evaluate the failure probability of the slope. (3)The failure state of the slope is related to the earthquake intensity and the type of ground motion. When the earthquake intensity is low, the probability of minor damage and moderate damage is greater. With the increase of earthquake intensity, the slope is more prone to serious damage. Near-field earthquakes have the characteristics of high energy and strong impact, which are more likely to cause slope instability.