Integrated Slope Stability Assessment and Solutions using PLAXIS ۲D and GEO۵

Slope stability is critical for infrastructure safety, particularly in seismically active regions. This work evaluates the stability of a slope along the Baroti-Reyur road in Himachal Pradesh, located in Zone ۵, using a novel combination of Limit Equilibrium Methods (LEMs) and Finite Element Methods (FEMs). The analysis examines natural slope conditions and the impact of sustainable mitigation measures, including retaining structures and bioengineering techniques, under the static and dynamic conditions. The soil model incorporated a modulus of elasticity (E) of ۹۰,۰۰۰ kN/m², and a poisson's ratio (v) of ۰.۳ to reflect realistic slope-soil-structure interactions. Retaining structures such as gravity, cantilever, and gabion walls (۴ m, ۶ m, and ۵ m high) were constructed using M۳۰ RCC and Fe۵۰۰ steel. Bioengineering measures featured deep-rooted grasses like Vetiver and Broom grass to improve soil cohesion (c), shrubs like Lantana camara for surface stability, and trees like Albizia lebbeck to reinforce deeper soil layers. These vegetation-based interventions enhanced slope resilience, while promoting ecological restoration. Theoretical LEM analysis revealed marginal stability, with static FOS values of ۱.۱ and pseudo-static FOS of ۱.۰۵. GEO۵ pseudo-static analysis indicated critically low FOS value of ۰.۸۸ for dynamic saturated conditions, improving to ۲.۰۱ with retaining structures. FEM analysis using PLAXIS ۲D provided more detailed insights, capturing complex soil-structure interactions with a static FOS of ۱.۰۲۸ and dynamic FOS of ۰.۹۹۴. By combining FEM with sustainable mitigation strategies, this work offers a framework for resilient slope stabilization, ensuring safety, while promoting environmental sustainability in seismically active regions.

کلیدواژه ها:

Numerical Modeling ، Finite Element Method (FEM) ، Factor of Safety (FOS)