关键词:
3D two-bench slope
limit analysis
modified pseudo-dynamic method
heterogeneity
unsaturation
摘要:
Due to rainfall infiltration,groundwater activity,geological processes,and natural erosion,soil often exhibits heterogeneity and ***,seismic events can compromise slope *** analytical solutions typically consider a single failure mode,leading to inaccurate slope stability *** study analyzes the impact of matric suction through three nonlinear shear strength models and adopts a heterogeneous soil model where cohesion linearly increases with *** improved pseudo-dynamic method is used to account for seismic *** on a three-dimensional(3D)trumpet-shaped rotational failure mechanism,a new framework is established to analyze the stability of 3D two-bench slopes in heterogeneous unsaturated soil under seismic *** internal energy dissipation rate and external power at failure are calculated,and the gravity increase method is introduced to derive an explicit expression for the safety factor(F_(s)).The results are compared with previously published results,demonstrating the effectiveness of the proposed *** analyses on different parameters are conducted,discussing the influence of various factors on F *** study proposes a new formula for calculating the F_(s) of 3D two-bench slopes in heterogeneous unsaturated soil under seismic effects,providing a practical application for slope engineering.