Cut slope stability assessment along forest roads using the limit equilibrium approaches and Slide software

Calculating the factor of safety (FS) as slope stability is necessary to prevent environmental damage. Therefore, this paper aims (i) calculate FS using limit equilibrium approaches and Slide software (ii) investigate slopes according calculated (Janbu Bishop methods) status different sites in study area (Hyrcanian forest Iran). Six landslides were selected along road by a field survey. Landslide dimensions including length, width, height measured meters. Slope gradients Suunto clinometer. The was used evaluate analysis slopes. According laboratory tests on soil samples average liquid recorded 58%. results direct shear test showed that rate cohesion (c) coefficient friction angle (φ) decreased with an increase moisture content. results, factors for landslide (Sites 1–6) be 1.3, 0.65, 0.76, 0.55, 1.19 1.51, respectively. These can accurately determine terms stability. classification, Site 1 “susceptible landside”. Sites 2, 3 4 are “very high risk”. Also, 5 6 “high risk” “stable”, instability studied related drainage system (lack culverts or ditches) well marlstone bedrock. comparison obtained real conditions sites, it concluded very accurate under morphology, hydrology mechanics.