Slope Mass Rating Around Malekhu-Thopal Khola Corrider, Malekhu, Central Nepal Lesser Himalaya
American Journal of Science, Engineering and Technology
Volume 2, Issue 1, March 2017, Pages: 6-14
Received: Oct. 29, 2016; Accepted: Dec. 2, 2016; Published: Jan. 20, 2017
Views 3110      Downloads 130
Authors
Jaya Laxmi Singh, Central Department of Geology, Tribhuvan University, Kathmandu, Nepal
Naresh Kazi Tamrakar, Central Department of Geology, Tribhuvan University, Kathmandu, Nepal
Article Tools
Follow on us
Abstract
The Malekhu-Thopal Khola area is rich in metamorphic rocks. The extension of road along the Malekhu-Thopal Khola can lead to the instability of stream bank slope. The road of the Malekhu Khola corridor has been extended from the Prithvi Highway to the southern remote area, and the road of the Thopal Khola corridor has been extended from the Prithvi Highway to the North in Dhading Besi. The study is focused on the Slope Mass Rating (SMR) of the road cut slope as well as the streambank slopes along the Malekhu Khola and the Thopal Khola (Malekhu-Dhading road).The result shows that the 38% slope of the study area is stable in terms of plane failure. The slopes lying across the Malekhu Formation and the Kalitar Formation are unstable. Considering the slopes in terms of toppling failure, 41% of the slopes are found to be stable, whereas some range from partially stable to stable slopes to the partially stable to the unstable slopes. Similarly, 50% of the slopes are stable to partially stable in terms of wedge failure, whereas some other slopes lying in the Fagfog Quartzite, Malekhu Limestone, Kalitar Formation and the Kulekhani Formation lie in unstable slope category. If the slope stability of the whole stream corridor is considered, only 20–25% of the slope area is completely stable while the remaining is vulnerable due to various slope failures.
Keywords
Slope Mass Rating (SMR), Rock Mass Rating (RMR), Toppling Failure, Plane Failure, Wedge Failure, Lesser Himalaya
To cite this article
Jaya Laxmi Singh, Naresh Kazi Tamrakar, Slope Mass Rating Around Malekhu-Thopal Khola Corrider, Malekhu, Central Nepal Lesser Himalaya, American Journal of Science, Engineering and Technology. Vol. 2, No. 1, 2017, pp. 6-14. doi: 10.11648/j.ajset.20170201.12
Copyright
Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
References
[1]
Bieniawski, Z. T., 1989. Engineering rock mass classifications. John Wiley and Sons,
[2]
Romana, M., Seron, J.B., 2001. Montalar E. La classificacion geomecenica SMR: Applicacion experiencias y validacion. In: Proceedings of V Simposio Nacional sobre taludes y laderas inestables, Madrid, pp. 393–404.
[3]
Romana, M., Seron, J.B., 2003. Montalar E. SMR Geomechanics classification: application, experience and validation. In: Proceedings of the international symposium on the role of rock Mechanics, South Africa Ins. Min. Metall, pp. 1–4.
[4]
Romana, M., Seron, J.B., Jorda, L., Velez M.I., 2005. La clasificaciongeomecanica SMR parataludes: Eestado actual, aplicacion y experiencia internacional. In: Proceedings of VI Simposio Nacional sobre taludes y laderas inestables, Valencia, pp. 239–50.
[5]
Stöcklin, J., and Bhattarai, K.D., 1977. Geology of Kathmandu Area and Central Mahabharat Range, Nepal Himalaya: Report of Dept. of Mines and Geology/UNDP (Unpublished), 86 p.
[6]
Stöcklin J., 1981. Geology of Nepal and its regional Frame. Journal of the Geological Society of London, 137p.
[7]
Sen, Z., Sadagah B. H., 2003. Modified rock mass classification system by continuous rating. Engineering Geology, v. 67, pp. 269–280.
[8]
Singh, J. L., Tamrakar N. K., 2013. Rock Mass Rating and Geological Strength Index of rock masses of Thopal-Malekhu River areas, Central Nepal Lesser Himalaya. Bulletin of the Department of Geology, Ktm, Nepal, v. 16, pp. 29–42.
[9]
Romana, M., 1985. New adjustment ratings for application of Bieniawski classification to slopes. Proceedings of the International Symposium on the Role of Rock Mechanics in Excavations for Mining and Civil Works. International Society of Rock Mechanics, Zacatecas, pp. 49–53.
[10]
Shrestha, P., and Tamrakar, N. K., 2007a, Streambankerodibility and lateral instability hazard in the Manahara River, Kathmandu basin, Nepal. Jour. of Nepal Geol. Soc., v. 35, pp. 55-66.
[11]
Upreti, B. N. and Dhital, M. R., 1996. Landslide studies and management in Nepal. ICIMOD, 87p.
ADDRESS
Science Publishing Group
1 Rockefeller Plaza,
10th and 11th Floors,
New York, NY 10020
U.S.A.
Tel: (001)347-983-5186