Dynamic Response and Stability Analysis of Anti-slide Pile Reinforced Slopes under Earthquake Conditions

This paper examines the seismic stability of a slope located in Shimian County, Ya'an City, Sichuan Province. The earthquake activity level in the area is classified as VIII, with a designed peak acceleration of 0.3g. A three-dimensional finite element model was established using ABAQUS to analyze the effects of different amplitudes of Wenchuan earthquake waves (0.1g, 0.2g, 0.3g) on the skid pile slope. Research has found that as the intensity of seismic waves rises, the peak seismic acceleration and displacement at various monitoring locations on the slope surface also grow, and the amplification effect becomes more significant at higher altitudes. In addition, the peak horizontal displacement in the x-direction at different elevations of the slope surface also increases with the rise in seismic wave amplitude The first principal stress of the skid pile is mainly concentrated near the connection between the sliding surface and the skid pile, and the peak stress increases with the amplitude of seismic waves. Research has shown that the stability coefficient of skid piles under 0.3g earthquake conditions is lower than the standard requirements, indicating that using skid piles alone may not be sufficient to ensure slope stability. Recommendations to strengthen or resize the structural design.