Study on Identification of Critical Sliding Surfaces and Instability Mechanisms of Double-layered Soil Landslides
The identification of critical sliding surfaces and instability mechanisms in layered soil slopes is of great significance in geotechnical engineering.This research focuses on providing more targeted reinforcement measures by examining different inducing mechanisms and triggering factors responsible for slope instability,while also analyzing the failure modes and destabilization processes.A finite ele-ment program was developed specifically for double-layered slopes commonly found in geotechnical engineering to study the evolution of stability behavior,critical sliding surface position,instability modes,and failure mechanisms under different geometric conditions.The intrinsic functional relation-ships between the safety factors FS,soil properties,and geometric shapes of non-homogenous slopes were derived.The study introduced the concept of double-sliding surface instability mechanisms and critical strength ratios,and defined the critical transition points between slope stability and instability,along with the criteria for identifying double-sliding surface instability.Additionally,the failure mecha-nisms of double-layered undrained slopes were revealed,and design charts related to stability and in-stability mechanisms were established.The research concludes that the calculated slope stability num-bers and stability conditions closely align with engineering practice.The computational program en-ables quick identification of potential critical sliding surfaces and accurate evaluation of slope failure mechanisms,providing novel insights and approaches for the stability analysis of double-layered soil slopes.
万方数据
维普
