Landslide Stabilization of Al-Adasiah Road Using Pile Wall Retaining System

Slope stability is crucial in civil, geotechnical, and environmental management, because it ensures safety, reliability, and functionality for natural and engineered slopes. The stability of a slope depends on the properties of materials, water conditions, geological features, slope geometry, and external factors, such as human activities and Weather. These factors determine the balance between forces that could cause slope failure and those that resist it. In March 2020, a major landslide occurred along the Amman-Na’ur-Dead Sea Highway, involving more than a 200-metre length and completely closing the main road that connects Amman to the Dead Sea area. This area has been generally recognized for its instability, often due to water springs. The current research presents a comprehensive geotechnical investigation and stability analysis of slopes affected by the described landslide event. It proposes a pile wall retaining system to stabilize the slope to avoid future highway closures. The research simulated different pile configurations using PLAXIS 2D, assessing different lengths from 35.0m to 45.0 m, diameters from 0.8 m to 1.4 m, and spacings from 2.0 m to 4.9 m to improve the area stability. The proposed pile wall system increased the stability of the slope and met the required safety factor. Keywords: Slope stability, Pile wall, Finite element, PLAXIS.