Abstract            Volume:12  Issue-11  Year-2024         Original Research Articles

Online ISSN : 2347 - 3215 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcret@gmail.com

A landslide zone stretching nearly 400 m along the SH-36 with the length of 115 m is located nearly 8 km from Guptkashi on way to Kalimath Village in Rudraprayag District, Uttarakhand. The rocks in the slide zone vicinity belongs to Kalimath Formation of Jutogh Group that falls under the Higher Himalaya. The rocks in the slide area are characterized by intercalated sequence of quartzite, schist and gneiss with thin bands of amphibolite. Regional strike of these rocks is E-W dipping due north. The rocks are fragile due to excess seepage of water at places. There are three sets of prominent joints with some variation and random joints. The kinematic analysis indicates possibilities of toppling of the rock blocks particularly with intersection of the joint planes N010°/75° and N110°/60°, where slope is trending N250°/65°. Similarly, toppling has also been indicated by the joint plane N015°/75°, where slope is trending N165°/55°. The ‘Sum of Moments’ comes out to be 113.57 kN/m, and 107.2 kN/m, respectively, for these two slope conditions, which indicates unsafe slope conditions. The analysis further indicates that intersection of the joint planes N180°/60° and N110°/60° makes the host rock prone to Wedge Failure. However, the value for factor of safety comes to 1.78, which indicates comparatively safe condition as far as Wedge Failure is concerned. Further, slope stability analysis for debris slope by limit equilibrium method indicates that slope is near to equilibrium towards stability in static conditions, while it may prove to be unstable during saturated and pseudo-static conditions.

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