Abstract
Several deformation phases in tectonically active Himalayas have rendered the rock masses very complex in terms of structure, lithology and degree of metamorphism. Again, anthropogenic activities such as roads, tunnels and other civil engineering constructions have led to a state of disequilibrium which in many cases, results in failure of rock masses. National Highway-05 around Jhakri area in India is a major connecting route to the China border in the hilly terrains of the state Himachal Pradesh. It cuts through the Himalayan rocks and has a hazardous history of landslides destroying human lives and interrupting communication very frequently. As a contribution towards the mitigation process, a study has been carried out along the highway to analyse kinematic stability and qualitative estimation of rock mass condition through rock mass classification systems. The kinematic analysis shows that the rock slopes are prone to planar and wedge failure. Rock mass rating for most of the locations lies between 7 and 34, representing a poor rock mass quality (Class IV), whereas slope mass rating is more disperse and ranges from 11 to 52 for most of the slopes (Class III, IV and V).
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Acknowledgements
The authors express their sincere acknowledgement to the Department of Earth Sciences, IIT Bombay, for providing facilities to conduct experimental works. The authors are also thankful to IIT (ISM) Dhanbad for providing financial support for Dips 6.0 from Faculty Research Scheme (Project No: FRS (46)/2013-2014/AGL).
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Kundu, J., Sarkar, K., Tripathy, A. et al. Qualitative stability assessment of cut slopes along the National Highway-05 around Jhakri area, Himachal Pradesh, India. J Earth Syst Sci 126, 112 (2017). https://doi.org/10.1007/s12040-017-0893-0
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DOI: https://doi.org/10.1007/s12040-017-0893-0