Stability of Slopes for Dam Excavation by Slope Mass Rating in the Pare Hydroelectric Project

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IJERTV9IS020352
Stability of Slopes for Dam Excavation by Slope Mass Rating in the Pare Hydroelectric Project

Sylvia Kashyap , Diganta Goswami , Ranjeet Bahadur Singh, Pawan Kumar Singh , Pragati Goswami, Dibyajyoti Kalita

Dam is an important element in all river valley projects, and excavation of both banks of the river, where the dam is abutted, is a very important consideration for the total cost of the project. Thus, the stability analysis of the side slopes of the rock mass is a very important exercise, for a feasible hydro-electric power project. The study area lies in the Papunpare district of Arunachal Pradesh, India which is represented by Upper Siwalik sub-group of the Sub- Himalayan range. In this paper the stability of rock slopes for a stable excavation for dam construction, is analyzed with the help of Slope Mass Rating (SMR) by using Basic Rock Mass Rating. Support measures, where ever required has also been recommended based on SMR. The satisfactory performance of the excavated slopes at the dam site of Pare H.E. P. project establishes that SMR method can be used with confidence for rock slope stability analysis.