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Cut slope stability evaluation of NH-21 along Nalayan-Gambhrola section, Bilaspur district, Himachal Pradesh, India

Author

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  • R. Sharma
  • B. Mehta
  • C. Jamwal

Abstract

In the present work a ready reckon (a handbook used for computation/reference) model for the evaluation of slope instability of road sections, particularly in mountainous terrain, is presented. The integrated approach incorporates different aspects of physical and geotechnical parameters, structural kinematics and the role of different clay minerals constituting the slope-forming materials, aimed at deciphering and understanding the mechanisms that controlled the slope instability. The role of the major sets of discontinuities, derived from stereo plots of structural data, with regard to the total number of unstable slopes present in each segment was considered, and the critical section was determined. The intense monsoon season rainfall in the area not only contributed to weathering of the rock mass, but also increased the water content in the clays that were present, leading to a reduction in the stability of natural slopes. The study revealed that where the slopes displayed relative presence of montmorillonite clays, with significant swelling capacity, failures were more frequent. Copyright Springer Science+Business Media Dordrecht 2013

Suggested Citation

  • R. Sharma & B. Mehta & C. Jamwal, 2013. "Cut slope stability evaluation of NH-21 along Nalayan-Gambhrola section, Bilaspur district, Himachal Pradesh, India," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 66(2), pages 249-270, March.
    • Handle: RePEc:spr:nathaz:v:66:y:2013:i:2:p:249-270
    DOI: 10.1007/s11069-012-0469-x
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    Citations

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    Cited by:

    1. Nahid Vatanpour & Mohammad Ghafoori & Hossein Talouki, 2014. "Probabilistic and sensitivity analyses of effective geotechnical parameters on rock slope stability: a case study of an urban area in northeast Iran," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 71(3), pages 1659-1678, April.
    2. Ashok Kumar Singh & Jagadish Kundu & Kripamoy Sarkar, 2018. "Stability analysis of a recurring soil slope failure along NH-5, Himachal Himalaya, India," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 90(2), pages 863-885, January.
    3. S. Anbazhagan & V. Ramesh & S. E. Saranaathan, 2017. "Cut slope stability assessment along ghat road section of Kolli hills, India," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 86(3), pages 1081-1104, April.

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