ANALISIS STABILITAS LERENG TERHADAP KELONGSORAN (STUDI KASUS DI JALAN RAYA BANDUNG-GARUT DESA CIHERANG KECAMATAN NAGREG)

Abstract

Landslides are disasters that frequently happen in the region of Ciherang Village. Heavy rainfall makes slopes unstable, resulting in landslides in the area of Ciherang Village, Nagreg District, and Bandung Regency. Nagreg District has a medium to high potential for soil movement because it is a mountainous location. This study attempts to assess the slope's stability by calculating the safety factor and ascertaining whether the slope will be susceptible to landslides under specific rainfall categories. Descriptive quantitative methodology is employed. Using a descriptive approach, data are collected by measurement, observation, and soil samples in the field.In order to numerically assign model input variables and assess slopes, quantitative analysis is used. Bishop's method's slope analysis findings reveal that the slope has a safety factor of 0.6. The decline in the FK value is impacted by rainwater intrusion. The impact of FK with extremely little rainfall dropped to 0.59. FK's mild rainfall has an impact of 0.52. FK changes to 0.48 as a result of moderate rainfall. FK decreases to 0.47 as a result of heavy rain. FK changes to 0.47 as a result of very heavy rain. With an increase in infiltration volume, the safety factor is dramatically reduced. It may be inferred that the slopes are in critical condition and have a high risk for landslides in all categories of rainfall.