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Sreekumar, S.
- Techniques for Slope Stability Analysis: Site Specific Studies from Idukki District, Kerala
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1 Department of Geology and Environmental Sciences, Christ College, Irinjalakuda - 680 125, IN
1 Department of Geology and Environmental Sciences, Christ College, Irinjalakuda - 680 125, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 73, No 6 (2009), Pagination: 813-820Abstract
The occurrences of slope failures are frequent in Idukki district of Kerala state particularly along the road cuttings and hill slopes causing disruption in traffic, loss of lives and property. This demands a critical evaluation of stability of slopes along the hill roads. This paper deals with stability analysis of a typical hard rock profile at Chuzhappu and a lateritic profile at Kumili along the road connecting Kottayam and Kumili. A large number of factors have been examined and studied; the orientation of discontinuities has been identified as one of the major inherent factors influencing slope instability along Chuzhappu hard rock profile. These have been analysed carefully using stereographic/equal area projection technique in order to determine the vulnerability to slope failure and to understand the type of rock slide that can occur in this profile. The buoyant force of water acting along the discontinuities after heavy rain storm further aids the down slope movement. As the laterite slope is mostly homogeneous, Bishops method and Swedish method were adopted for stability analysis of laterite slope at Kumili. The study also examines the efficacy and applicability of the different methods employed in soil mechanics to assess the stability of laterite slope. The results obtained by this method are compared by actual field conditions. The stability assessment indicates that two sectors at Chuzhappu and one sector at Kumili profile are at the geo-technical threshold of failure, when piezometric head rises during rainstorm. The study indicates that these methods are highly useful in determining the Factor of Safety in profiles with similar geological setting.Keywords
Factor of Safety, Stereographic Projections, Slope Stability, Wedge Failure, Kerala.
References
- AJAY NAITHANI, K., VARUN JOSHI and PRASAD, C. (2002) Investigation on the Impact of Cloud Burst in Tehri District, Uttaranchal-31 August 2001. Jour. Geol. Soc. India, v.60, pp.573-577.
- BISHOP, A.W. (1955) The Use of the Slip Circle Stability in Analysis of Slopes. Geotechnique, v.1, pp.7-17.
- DUNCAN, J.M. and WRIGHT, S.G. (1980) The Accuracy of Equilibrium Methods on Slope Stability Analysis. Proc.Internat. Symp. on Landslides, New Delhi, pp.247-270.
- FELLENIUS, W. (1936) Calculation of Stability of Earthdams. Trans.e Second Internat. Congress on Large Dams, Washington, D.C, pp.445-465.
- GOPALARANJAN and RAO, A.S.R. (1993) Basic and Applied Soil Mechanics. Wiley Eastern Ltd., New Delhi, 632p.
- HOEK, E. and BRAY, J. (1981) Rock Slope Engineering, The Institution of Mining and. Metallurgy, London, p399.
- JAEGAR, J.C. (1971) Friction of Rocks and Stability of Rock slopes.Geotechnique, v,21(2), pp.97-134.
- JAEGAR, J.C. and COOK, N.C.W. (1971) Fundamentals of Rock Mechanics. Chapman and Hall, London, 378p.
- JANBU, N. (1954) Application of Composite Slip Surface for Stability Analysis. Proc. European Conf. on Stability of Earth slopes, Stockholm, v.3, pp.43-49.
- KRISHNANATH, R. (1985) Identification and Location of Land Slide Prone Areas. Proc. Workshop on Landslides in Western Ghats, State Committee for Science, Technology and Environment, Trivandrum, pp.1.1-1.44.
- MARKLAND, J. T. (1972) A Useful Technique for Estimating the Stability of Rocks slopes when the Rigid Wedge Sliding Type of Failure is Expected. Imperial College Rock Mechanics.Research Report No. 19.
- MULLER, L. (1964) Application of Rock Mechanics in the Design of Rock Slopes. In: W.R. Judd (Ed.), State of Stress in the Earths Crust. Elsevier, New York, pp.575-606.
- PHILLIPS, F.C. (1954) The Use of Stereographic Projections in Structural Geology. Edward Amold, London. p85.
- SREEKUMAR, S. (1998) Geotechnical and Petrological Studies of Slopes along the Kottayam-Kumili Road, Kerala State, India.Unpubld. Ph.D thesis, University of Kerala, p.320.
- SREEKUMAR, S. and KRISHNANATH, R. (2000) Stability of Laterite Profiles in parts of Western Ghats, India. In: Land slides Research: Theory and Practice, v.3, Thomas Telford, London, pp.1395-1400.
- TERZAGHI, K. and PECK, R.B. (1967) Soil Mechanics in Engineering Practice (2nd ed.), Wiley, New York, 729p.
- VALDIYA, K.S (1998) Catastrophic Landslides in Uttaranchal, Central Himalaya. Jour. Geol. Soc. India, v.52, pp.483-486.
- VIKRAM GUPTA and BIST, K. S. (2004) The 23 September 2003 Varunavat Pawat landslide in Uttarkashi township, Uttaranchal.Curr. Sci., v.87(11), pp.1600-1605.