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Landslides are one of the extensive and destructive natural hazards in the mountainous areas and can cause loss of life and infrastructure. Slope stabilization methods can be adopted to minimize the losses due to landslides. The aim of this study is to investigate the failed slope due to landslides and suggest the site-specific ground improvement s...
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A common approach for ground improvement of soft clays is installing stone columns to increase the bearing capacity, reduce the settlement, and accelerate the consolidation time. However, stone columns may not have sufficient capacity in very soft formations due to the lack of confinement of the enfolding soft soils. The contamination of column agg...
Citations
... The soil properties for this study were collected through a comprehensive literature review, focusing on previous research conducted within or near the study area [36,37]. The soil water characteristic curve (SWCC) used in the referenced paper is characterized by the Gardner equation [38] (Formula (1)). ...
Global warming has led to an increase in extreme rainfall events, which often result in landslides, posing significant threats to infrastructure and human life. This study evaluated the effectiveness of the Capillary Barrier System (CBS) in enhancing slope stability along a vulnerable section of India’s National Highway 10 (NH10) during maximum daily rainfall. The GEOtop model was employed to conduct water balance simulations and obtain the pore–water pressure (PWP), which was then used to calculate the Factor of Safety (FoS). Results showed that CBS effectively delayed the rise in PWP, leading to lower peak values and smaller areas of very high and high risk levels. Spatial distribution mapping further confirmed that CBS minimized very high risk zones. At three historical landslide points, CBS slopes generally maintained FoS values above 1, demonstrating enhanced stability and improved resilience to extreme rainfall. These findings highlight the potential of CBS as a viable strategy for slope reinforcement in regions susceptible to heavy rainfall.
The National Highway (NH)-707 in Kacchi Dhang region of Himachal Pradesh, India, witnessed frequent landslide incidents in the past years, mainly during monsoon season. Considering the socio-economic significance and limited study of this failure slope, the present study aims for detailed site-specific investigation, including unmanned aerial vehicles (UAV)-based field survey, geotechnical/mineral characterization, stability analysis, and proposing a suitable remedial measure for the Kacchi Dhang landslide. Geotechnical testing of slope material provides important insights regarding the soil type and shear strength characteristics. In addition, the rainfall pattern of the study area has been analyzed to relate the rainfall threshold and slope instability. Further, field and geotechnical data were used for stability assessment of failed slope under dry and saturated cases. The results indicated that the post-failure slope is stable under dry conditions, with a factor of safety (FoS) of 1.263 using the limit equilibrium method (LEM). However, as the water table rises toward the surface, representing partially and fully saturated conditions, the FoS decreases to 1 and 0.718, respectively. Finally, effective remedial measures, including benching coupled with self-drilling anchors, were suggested to strengthen the failed slope using LEM in dry and saturated conditions. The proposed mitigation measures showed an improved overall FoS of 1.415 in fully saturated states, ensuring stability even during extreme rainfall events. Finally, a sensitivity analysis for both unreinforced and reinforced slopes has been conducted to identify the critical soil and nail parameters that have a greater influence over slope stability. This study provides detailed information regarding causative factors, stability as well as long-term remedial measures to minimize the risk related to such landslide failure.
