Computational Modeling of Earthquake Dynamic Responses of Landslide with Low Dip Angle by Different Governance Schemes

摘要

The earthquake dynamic responses of a landslide with low dip angle under different governance conditions were simulated through computational modeling. Five conditions with different governance schemes are studied. The results turn out that the main cause of the landslide is the groundwater produces a floating force acting on the bottom of the landslide body, and the hydrostatic pressure acting on the trailing edge, coupled with the groundwater and rainfall which weakened the soil strength and a sliding plane formed. The maximum horizontal displacement by different governance schemes is decreased by 45.4%, 70.9%, 72.6%, and 83.6% under gravity, respectively, and the maximum horizontal displacement is reduced by 21.56%~26.67%, 61.44%~69.62%, 60.26%~68.33%, and 74.41%~82.26% after earthquake with different amplitudes, respectively. The anchor on the trailing edge is effective and vital in the governance of landslide with low dip angle. The bending moment of the slide-resistant pile in each case increases with the burial depth and peaks at 2~3 m beneath the sliding plane, then the bending moment decreases with depth gradually.