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Residential areas located around slopes have a high risk of landslides. Landslides occur when the force of gravity exceeds the shear strength exerted by the soil mass. Landslides are caused by natural and human activity factors, such as excavation or slope cutting, that change the land's topography. Therefore, it is necessary to investigate landslide hazards on excavation slopes around residential areas. This study aims to examine landslide hazards against topographic changes due to soil excavation by calculating the slope safety factor to avoid landslide hazards in the future. In this study, the slope safety factor was calculated using the Fellenius Method at varying slope gradients and heights so that the results of the safety factor analysis are closer to the actual conditions in the field. From the measurement results, the slope height is 1.96 m to 4.8 m with a slope angle between 38° and 84°. Along the slope span of approximately 140 m, 91.7% of the slope is in a very steep condition. The safety factor value is in the range of 1.12–5.12. It can be concluded that there is one point on the maximum slope where the safety factor value is in a critical condition because the value is 1.0 < SF < 1.5 (SF = 1.12). This situation can endanger the safety and comfort of people living around the slope. Therefore, further studies are needed regarding preventing landslide hazards in the future.

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Impact of Post-development Slope Geometry on Landslide Hazard and Safety Factor: Field Investigation in Indrapuri Residential Area

  • 会议论文

  • 发表日期：

    2026年

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  • Merley Misriani,
  • Muhamad Yusa,
  • Joleha Joleha,
  • Indra Birawaputra,
  • Ceni Febi Kurnia Sari

摘要

Residential areas located around slopes have a high risk of landslides. Landslides occur when the force of gravity exceeds the shear strength exerted by the soil mass. Landslides are caused by natural and human activity factors, such as excavation or slope cutting, that change the land's topography. Therefore, it is necessary to investigate landslide hazards on excavation slopes around residential areas. This study aims to examine landslide hazards against topographic changes due to soil excavation by calculating the slope safety factor to avoid landslide hazards in the future. In this study, the slope safety factor was calculated using the Fellenius Method at varying slope gradients and heights so that the results of the safety factor analysis are closer to the actual conditions in the field. From the measurement results, the slope height is 1.96 m to 4.8 m with a slope angle between 38° and 84°. Along the slope span of approximately 140 m, 91.7% of the slope is in a very steep condition. The safety factor value is in the range of 1.12–5.12. It can be concluded that there is one point on the maximum slope where the safety factor value is in a critical condition because the value is 1.0 < SF < 1.5 (SF = 1.12). This situation can endanger the safety and comfort of people living around the slope. Therefore, further studies are needed regarding preventing landslide hazards in the future.