GM  Vol.1 No.3 , October 2011
Stability Analysis of Cut Slopes Using Continuous Slope Mass Rating and Kinematic Analysis in Rudraprayag District, Uttarakhand
Abstract: In mountain terrains of Himalaya, road and highway networks play a vital role in remote areas for transportation, public network and all kind of socio-economic activities. The stability of rock slopes along the roads and highways is a major concern in these hilly regions. Any kind of slope failure may lead to disruption in traffic, loss of properties and lives/injuries as well as environmental degradation. The unplanned excavations of rock slopes for construction or widening purposes may undermine the stability of the slopes. The present study incorporates the stability analysis of road cut slopes along NH-109 which goes to holy shrine of Kedarnath. Slope failure is not only a phenomenon of rainy season but it has also been encountered even in dry season. The study area experiences high vehicular traffic especially from March to August due to pilgrims since it is the only road to Kedarnath. The distance of about 20 km between Rudraprayag and Agastmuni has been investigated. The continuous slope mass rating (CSMR) technique has been used for slope stability analysis at five different locations. CSMR is modification of original slope mass rating (SMR) proposed by Romana which is based on well established rock mass rating (RMR) technique. Kinematic analysis was also carried out to evaluate these sites for types of failure and its potential failure directions. The potentially vulnerable sites were identified. The results indicate that the CSMR technique may be exploited to assess the stability of rock slopes in the Himalayan territory.
Cite this paper: nullR. Umrao, R. Singh, M. Ahmad and T. Singh, "Stability Analysis of Cut Slopes Using Continuous Slope Mass Rating and Kinematic Analysis in Rudraprayag District, Uttarakhand," Geomaterials, Vol. 1 No. 3, 2011, pp. 79-87. doi: 10.4236/gm.2011.13012.

[1]   G. Kumar, “Geology and Sulphide Mineralization the Pokheri Area Chamoli District, Uttar Pradesh,” Geological Survey of India Miscelleneous Publication, Vol. 16, 1971, pp. 92-128.

[2]   N. S. Virdi, M. P. Sah and S. K. Bartarya, "Pro-ject Report: Landslide Hazard Zonation in the Beas and Satluj Valleys of Himanchal Pradesh, Phase-I Satluj Valley," Wadia Institute of Himalayan Geology Technical Report, Volume unpublished, 1995, p. 132.

[3]   P. Rautela and R. K. Pande, "Traditional Inputs in Disaster Management: The Case of Am-parav, North India," International Journal of Environmental Studies, Vol. 62, No. 5, 2005, pp. 505-515.

[4]   A. Uniyal and R. K. Pande, “The Fury of Nature in Utt- aranchal: Uttar-kashi Landslide of the Year 2003,” Disaster Prevention and Management, Vol. 16, No. 4, 2007, pp. 562-575.

[5]   R. An-balagan, S. Sharma and T. K. Raghuvanshi, “Rock Mass Sta-bility Evaluation Using Modified SMR Approach,” Proceed-ings 6th Natural Symposium on Rock Mechanics, Bangalore, India, 1992, pp. 258-268.

[6]   V. Vishal, S. P. Pradhan, and T. N. Singh, “Instability Assessment of Mine slope―A finite element approach,” International Journal of Earth Sciences & Engineering, Vol. 3, No. 6, 2010, pp. 11-23.

[7]   S. P. Prad-han, V. Vishal, and T. N. Singh, “Slope Mass Rating for Evaluation of Health of Slopes in an Open Cast Mine in Jharia Coalfield India,” Mining Engineers’ Journal, Vol. 12, No. 10, 2011, pp. 36-40.

[8]   M. Romana, “New Adjustment Ratings for Application of Bieniawski Classification to Slopes,” Pro-ceedings of International Symposium on the Role of Rock Me-chanics, International Society for Rock Mechanics, Salzburg, 1985, pp. 49-53.

[9]   M. Romana, “A Geomechanical Classi-fication for Slopes: Slope Mass Rating,” In: J. A. Hudson Ed., Comprehesive Rock Engineerin, Pergamon Press, Oxford, 1993, pp. 575-600.

[10]   Z. T. Bieniawski, “The Geomechanical Classification in Rock Engineering Applications,” Proceedings of 4th International Congress on Rock Mechanics, International Society for Rock Mechanics, Salzburg, Vol. 2, 1979, pp. 41-48.

[11]   Z. T. Bieniawski, “Engineering Rock Mass Classi-fication,” Chichester, Wiley, London, 1989.

[12]   R. Tomas, A. Cuenca and J. Delgado, "Modificación del Slope Mass Rating (SMR) a través de Funciones Continuas," Ingeniería Civil, Vol. 134, 2004, pp. 17-24.

[13]   R. Tomas, M. Cano, A. Cuenca, J. C. Canaveras and J. Delgado, “Nuevas Funciones Continuas para el Calculo del Slope Mass Rating,” Rev Soc Geol Espana, Vol. 19, 2006, pp. 87-97.

[14]   R. Tomas, J. Delgadob and J. B. Seron, “Modification of Slope Mass Rating (SMR) by Con-tinuous Functions,” International Journal of Rock Mechanics & Mining Sciences, Vol. 44, No. 7, 2007, pp. 1062-1069.

[15]   G. Kumar and N. C. Agrawal, “Geology of the Srinagar-Nandprayag Area (Alakananda Valley), Chamoli, Garhwal and Tehri Garhwal Districts, Kumaun Himalaya, Uttar Pradesh,” Himalayan Geology, Vol. 5, 1975, pp. 29-59.

[16]   G. Kumar, “Geology of Uttar Pradesh and Uttaranchal,” Geologi-cal Society of India, Banglore, 2005, p. 383.

[17]   S. H. Mehdi, G. Kumar and G. Prakash, “Tectonic Evolution of Eastern Kumaon Himalaya: A New Approach,” Himalayan Geology, Vol. 2, 1972, pp. 481-501.

[18]   S. S. Negi, A. K. Sinha and B. K. Pandey, “A Preliminary Report on the Geology and Struc-ture of the Rudraprayag- Tilwara-Mayali Area of Garhwal Hi-malaya,” Himalayan Geology, Vol. 10, 1980, pp. 211-219.

[19]   International Society of Rock Mechanics, “Sug-gested Methods for Determining Tensile Strength of Rock Mate-rials,” International Journal of Rock Mechanics and Mining Sciences, Geomechanics Abstract, Vol. 15, No. 3, 1978, pp. 99-103.

[20]   International Society of Rock Mechanics, “Rock Characterization Test-ing and Monitoring, ISRM Suggested Methods,” Salzburg, 1981, p. 211.

[21]   B. Singh and R. K. Geol, “Rock Mass Clas-sification: A Practical Approach in Civil Engineering,” Elsevier, Amsterdam, 1999, p. 282.

[22]   A. Palmstrom, “The Volumet-ric Joint Count—a Useful and Simple Measure of the Degree of Rock Mass Jointing,” Proceedings of 4th Conference of Inter-national Association of Engineering Geologist, New Delhi, 1982, pp. 221-228.