Engineering Geological and Geotechnical Studies of Taprang Landslide, West-central Nepal: An Approach for Slope Stability Analysis

Authors

  • Ashok Sigdel Department of Geology, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu, Nepal
  • Radha Krishna Adhikari Department of Geology, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu, Nepal

DOI:

https://doi.org/10.30564/jgr.v2i4.2302

Abstract

Detailed investigation of Taprang landslide was carried out in order to understand the surface, subsurface lithological information and physical properties of soil by using multi-disciplinary methods such as engineering geological, geophysical and geotechnical studies for the determination of factor of safety for slope stability analysis. Geological study was carried out by detail mapping of surface geology, soil condition, properties of bedrock and its discontinuities. The geophysical survey (Electrical Resistivity Tomography-ERT) were carried out to know the electrical resistivity of soil for identifying the groundwater table and slip surface of the landslide. Geotechnical analysis such as grain size analysis, liquid limit and direct shear test were carried out in order to evaluate soil classification, moisture content, cohesion and the angle of internal friction of soil for knowing the strength the soil. These soil parameters indicate the soil is very low strength. The combination of these results were used for calculating the factor of safety (FoS) by Limit Equilibrium Method (LEM) proposed by Bishop and Janbu methods. The result of factor of safety in the Taprang landslide demonstrates that the slope become stable in drained (dry) condition, remain ultimate stage in undrained (wet) condition and finally failure occurs if applied the seismic load in both drained and undrained conditions.

Keywords:

Taprang Landslide; Electrical Resistivity Tomography (ERT); Groundwater Table; Limit Equilibrium Method (LEM); Factor of Safety; Kinematic Analysis; Slope Stability

References

[1] Abramson, L. W., Lee, T. S., Sharma, S., Boyce, G. M. Slope Stability Concepts. Slope Stabilization and Stabilization Methods, Second edition, published by John Willey & Sons, Inc., 2002, 329-461.

[2] Taylor, M. J., Burns, S. F. Slope and seismic stability of Castle Lake Debris Dam, St. Helens, Washington. Landslide and Avalanches: ICFL 2005 Norway, Edr. Senneset, Flaate and Larsen, 2005.

[3] Thielen, A., Friedel, S., Plotze, M., Springman, S.M. Combined approach for site investigation in terms of the analysis of rainfall induced landslides. Proceedings of the 16th Int. Conf. on Soil Mechancis and Geotechnical Engineering, Osaka Japan, 2005: 2591.

[4] Chen N Z., Y., Shao C. M. Evaluation of minimum factor of safety in slope stability analysis. Can. Geotech. J.,1988, 25: 735-748.

[5] Zheng, H., Tham, LG., Liu, D. On two definitions of the factor of safety commonly used in the finite element slope stability analysis Computers and Geotechnics, 2006, 33, (3): 188-195.DOI: https://doi.org/10.1016/j.compgeo.2006.03.007

[6] Park, S., Kim, W., Lee, J., Baek, Y. Case Study on Slope Stability Changes Caused by Earthquakes-Focusing on Gyeongju 5.8 ML EQ. Sustainability, 2018, 10(10): 3441. DOI: https://doi.org/10.3390/su10103441

[7] Ban, L., Du, W., Qi, C. Stability analysis of anchored slopes based on a peak shear-strength criterion of rock joints. Environ Earth Sci, 2020, 79: 215. DOI: https://doi.org/10.1007/s12665-020-08961-0

[8] Karaman, K., Ercikdi, B., Kesimal, A. The assessment of slope stability and rock excavatability in a limestone quarry. Earth Sci. Res. J. [online], 2013, 17: 169-181.

[9] Ali, J., Ahmed, K., Akhtar, K., Qudooskhan, A., Hussain, M. Stability analysis of slopes using numerical simulation based on finite element method and limiting equilibrium approach. AARJM, 2015, 2 (3): 371-379.

[10] Deng, G., Xu, T., Chen, RNumerical Analysis on Stabilizing Mechanism of Soil Nails in Steep Fill Slopes Subjected to Rainfall Infiltration Using a Hypoplastic Model. Arab J Sci Eng., 2018, 43: 5079-5090. DOI: https://doi.org/10.1007/s13369-017-2937-9

[11] Lin, H., Zhong, W., Xiong W., Tang, W. Slope Stability Analysis Using Limit Equilibrium Method in Nonlinear Criterion. The Scientific World Journal volume, 2014,Article ID 206062, 7 pages. DOI: http://dx.doi.org/10.1155/2014/206062

[12] Liu, S.Y., Shao L.T., Li H.J. Slope stability analysis using the limit equilibrium method and two finite element methods. Computers and Geotechnics, 2015, 63: 291-298.

[13] Mandal, J., Narwal, S., Gupte, S.S. Back Analysis of Failed Slopes - A Case Study., International Journal of Engineering Research & Technology (IJERT),2017, 6(5).

[14] Sarkar, S., Samanta., M., Sharma M., Dwivedi., A. Slope Stability Analysis and Suggestive Measures for an Active Landslide in Indian Himalaya. In book: Recent Research on Engineering Geology and Geological Engineering, 2019.DOI: DOI: https://doi.org/10.1007/978-3-030-02032-3_1

[15] Adhikari, DP., Koshimizu, SDebris flow disaster at Larcha, upper Bhotekoshi Valley, Central Nepal. Island Arc, 2005, 14(4): 410-23.

[16] Dhital, MR. Causes and consequences of the 1993 debris flows and landslides in the Kulekhani watershed, central Nepal, 2003.

[17] MoHA and DPNet, Nepal Disaster Report 2015. Ministry of Home Affairs (MoHA) and Disaster Preparedness Network-Nepal (DPNet): 2015, Kathmandu.

[18] Barnard, PL., Owen, LA., Finkel, RC. Quaternary fans and terraces in the Khumbu Himal south of Mount Everest: their characteristics, age and formation. J. Geol. Soc. Lond., 2006, 163: 383-399.

[19] Selby, MJ. Landforms and denudation of the High Himalaya of Nepal: results of continental collision. Z Geomorphol Neue Folge, 1988, 69:133-152. (Supplemented)

[20] Dhital, MR., Upreti, BN., Dangol, V., Bhandari, AN., Bhattarai, TN. Geological engineering methods applied in mountain road survey: an example from Baitadi-Darchula Road Project, Nepal. J Geol Soc of Nepal, 1991, 59: 89-94.

[21] Gallo, F, Lavé J. Evolution of a large landslide in the High Himalaya of central Nepal during the last half-century. Geomorphology, 2014, 223: 20-32. DOI: https://doi.org/10.1016/j.geomorph.2014.06.021

[22] Ibetsberger, HJ. The Tsergo Ri Landslide: An uncommon area of high morphological activity in the Langthang Valley, Nepal. Tectonophysics,1996, 260(1): 85-93.

[23] KC, J., Gautam, D., Neupane, P., Paudyal, KR. Landslide inventory mapping and assessment along the Ramche-Jharlang area in Dhading, Rasuwa and Nuwakot districts, Lesser Himalaya Central Nepal. Journal of Nepal Geological Society, 2018, 55 (Sp. Issue): 103-108.

[24] Timilsina, M., Bhandary NP., Dahal RK., Yatabe, R. Distribution probability of large scale landslides in Central Nepal. Geomorphology, 2014, 226:236-248. DOI: https://doi.org/10.1016/j.geomorph.2014.05.031

[25] Upreti, BN., Dhital MR Landslide studies and management in Nepal ICIMOD, Nepal. 1996: 87.

[26] Acharya, T., Yang, I. T., Landslide Hazard Zonation using GIS: A Case Study from Sindhupalchowk, Nepal, International Journal of Applied Engineering Research, 2015, 10 (7): 18385-18394.

[27] Devkota, KC. Regmi A.D., Pourghasemi, H.R., Yoshida, K., Pradhan, B., Ryu. IC., Dhital, MR., Althuwaynee O. F. Landslide susceptibility mapping using certainty factor, index of entropy and logistic regression models in GIS and their comparison at Mugling-Narayanghat road section in Nepal Himalaya. Nat Hazards, 2013, 65:135-165. DOI: https://doi.org/10.1007/s11069-012-0347-6

[28] Poudel, K., Regmi, AD. Landslide susceptibility mapping along Tulsipur-Kapurkot road section and its surrounding region using bivariate statistical model. Journal of Nepal Geological Society, 2016, 50(1):83-93.DOI: https://doi.org/10.3126/jngs.v50i1.22868

[29] Dahal, RK., Hasegawa, S. Representative rainfall thresholds for landslides in the Nepal Himalaya. Geomorphology, 2008, 105(3-4): 429-443.

[30] Dahal, RK., Hasegawa, S., Nonomura, A., Yamanaka, M., Dhakal, S., Paudyal, P. Predictive modeling of rainfall-induced landslide hazard in the Lesser Himalaya of Nepal based on weights-of-evidence. Geomorphology, 2008, 102: 496-510.

[31] Bhandary, NP., Yatabe, R., Dahal RK., Hasegawa, S., Inagaki, H. Areal distribution of large-scale landslides along highway corridors in Central Nepal. Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards, 2013, 7: 1-20. DOI: http://doi.org/10.1080/17499518.2012.743377

[32] Regmi, AD., Yoshida K., Dhital, MR, Devkota, K. Effect of rock weathering, clay mineralogy, and geological structures in the formation of large landslide, a case study from Dumre Besei landslide, lesser Himalaya Nepal. Landslides, 2013, 10: 1-13.DOI:https://doi.org/10.1007/s10346-011-0311-7

[33] Regmi, A D., Yoshida, K, Dhital, MR, Pradhan, B. Weathering and mineralogical variationin gneissic rocks and their effect in Sangrumba landslide, East Nepal. Environ Earth Sci, 2014, 71: 2711-2727. DOI: https://doi.org/10.1007/s12665-013-2649-8

[34] Panta, SR. Study of subsurface of a landslide by geophysical methods. In: Landslide hazard Mitigation in the Hindu Kush Himalaya, 2001, ICIMOD: 89-120.

[35] Aryal KP. Slope stability evaluations by limit equilibrium and finite element methods, PhD Thesis, Norwegian University of Science and Technology, Trondheim, Norway, 2006.

[36] Gurung, N., Haneberg, WC., Gunturi R., Datta, M. Engineering Geology and Stability of the LaprakLandslide, Gorkha District, Western Nepal. Environmental and Engineering Geoscience, 2011.DOI: https://doi.org/10.2113/gseegeosci.17.1.23.

[37] Khanal NR, Koirala A, Gurung SB, Kumar U, Rijal R, Sigdel S, Acharya C, Yadav UP Madi River, Nepal: landslide dam outburst flood risk management, ICIMOD, Nepal, 2013.

[38] Regmi, AD. Yoshida, K., Cui, P., Hatano, N. Development of Taprang landslide, West Nepal. Landslides, 2017, 14(3): 929-946. DOI: https://doi.org/10.1007/s10346-016-0752-0

[39] Bishop, A. W. The use of the Slip Circle in the Stability Analysis of Slopes Géotechnique, 1955, 5(1): 7-17.

[40] Janbu, N. Applications of composite slip surfaces for stability analysis. In: European conference on the stability of earth slopes, 3.Stockholm. Procedings, 1954: 43.

[41] Dhital, MR. Geology of the Nepal Himalaya: Regional Perspective of the classical collided orogen. Spri. Int Pub, Switzerland, 2015, 230-233.

[42] Stöcklin, J., Bhattarai, KD. Geology of Kathmandu area and central Mahabharat range Nepal. In: Himalaya Report, Department of Mines and Geology, Kathmandu, Nepal, 1977, 86 p

[43] Pasierb, B., Resistivity tomography in prospecting geological surface and anthropogenic objects. Techn Trans Environ Eng, 2012, 23: 201-209.

[44] Kneisel, C., Hauck, C., Fortier, R., Moorman, B. Advances in geophysical methods for permafrost investigations. Permafrost and Periglacial Processes,2008, 31(1): 15-30. DOI: https://doi.org/10.1002/ppp.616

[45] Loke MH, Tutorial: 2-D and 3-D electrical imaging surveys, 2009.

[46] Loke, MH. Tutorial: 2-D and 3-D electrical imagining surveys. Geotomo Software, Malaysia, 2014.

[47] Chaulya, S.K., Prasad G.M. Slope Failure Mechanism and Monitoring Techniques Sensing and Monitoring Technologies for Mines and Hazardous Areas, 2016.

[48] Zhao, Y., Tong ZY., Lü, Q. Slope Stability Analysis Using Slice-Wise Factor of Safety. Mathematical Problems in Engineering, 2014, Article ID 712145, 6 pages. DOI: http://dx.doi.org/10.1155/2014/712145

[49] Thapa, DR., Wang, G. Probabilistic seismic hazard analysis in Nepal Engineering Vibration, 2013, 12(4): 577-586. DOI: https://doi.org/10.1007/s11803-013-0191-z

[50] Lim, SS., Yang, HS. An analysis of plane failure of rock slopes by quantified stereographic projection. Int J of Rock Mech and Mining Sci, 2004, 41(3): 505-505.DOI: https://doi.org/10.1016/j.ijrmms.2003.12.037

[51] Stanisz, J., Pilecki, Z., Woźniak, H. Selected aspects of numerical analysis of landslide stability in Swoszowice. Geological exploration technology geothermics. Sustain Dev, 2012, 2: 77-88.

[52] Baum, R.L., Fleming, R.W. Use of longitudinal strain in identifying driving and resisting elements of landslides. Geol. Soc. of Am. Bull, 1991, 103(8): 1121-1132. DOI: https://doi.org/10.1130/0016-7606(1991)103<1121:UOLSII>2.3.CO;2

[53] Yagi, H., Maruo, Y., Saijo, K., Nakamura, S. The September 1988 large landslide in the vicinity of MCT, Darbang, Nepal. Journal of Japan Landslide Society Tokyo, 1990, 26: 45-49.

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How to Cite

Sigdel, A., & Adhikari, R. K. (2020). Engineering Geological and Geotechnical Studies of Taprang Landslide, West-central Nepal: An Approach for Slope Stability Analysis. Journal of Geological Research, 2(4), 22–35. https://doi.org/10.30564/jgr.v2i4.2302

Issue

Vol. 2 , Iss. 4 (October 2020)

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Articles

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Copyright © 2020 Ashok Sigdel, Radha Krishna Adhikari

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