Analysis for Stabilization of Soil Slope in Silty Soil with Replacement of Soil Cement
The slope instability may result due to change in stress conditions, rise in groundwater and rainfall. Similarly, many slopes that have been stable for many years may suddenly fail due to loss of soil shear strength, and external forces. This is a crucial problem as it may destroy buildings, damage roads, and even leads to loss of human life. So it is imperative to understand failure mechanism and adopt safety measures to prevent such failures. The objective of this study is to analyze the slope at different angles (at 300, 350, 450 & 600 ) in silty soil and propose a method to stabilize it. The proposed methods to stabilize the existing slope are replacing soil-cement (7% by weight) by vertical layering and layering along the slope. Limit equilibrium method was used to analyze the slopes. The existing slopes were likely to be failed because values of minimum FOS was computed less than 1.5. The FOS improved significantly after replacing soil cement by both methods. Among the two methods, it was revealed that the layering along slope method of soil replacement was most economical and easy to be executed at the site.
Abramson, L. W., Lee, T. S., Sharma, S., and Boyce, G. M. “Slope Stability Concepts. Slope Stabilisation and Stabilisation Methods.” Second edition, published by John Willey &Sons, Inc., (2002) pp. 329‐461.
Taylor, M. J. and Burns, S. F. “Slope and seismic stability of Castle Lake Debris Dam.” St.Helens, Washington. Landslide and Avalanches: ICFL 2005 Norway, Edr. Senneset, Flaateand Larsen (2005).
Nash, D. “Comprehensive Review of Limit Equilibrium Methods of Stability Analysis. Slope Stability.” Chapter 2. M. G. Andersen and K. S. Richards, Eds. New York: Wiley, pp. 11-75, 1987.
Chowdhury, R.N. “Preface Slope Analysis.” Developments in Geotechnical Engineering, 22 (1978): vii–viii. doi:10.1016/b978-0-444-41724-4.50005-0.
Ahmed, M. F., M. S. Khan, M. A. Raza, S. Saqib, and H. Saadat. "Slope Failure Analysis of Havelian Landslide, Abbottabad Pakistan." Pakistan Journal of Science 68, no. 4 (2016).
Cheng, Y. M. “Slope Stability Analysis and Stabilization” (June 3, 2008). doi:10.4324/9780203927953.
Chugh, A. K. “Variable Factor of Safety in Slope Stability Analysis.” Géotechnique 36, no. 1 (March 1986): 57–64. doi:10.1680/geot.19188.8.131.52.
Agam, M. W., M. H. M. Hashim, M. I. Murad, and H. Zabidi. "Slope sensitivity analysis using spencer's method in comparison with general limit equilibrium method." Procedia Chemistry 19 (2016): 651-658. doi:10.1016/j.proche.2016.03.066.
Zhou, X.P., and H. Cheng. “The Long-Term Stability Analysis of 3D Creeping Slopes Using the Displacement-Based Rigorous Limit Equilibrium Method.” Engineering Geology 195 (September 2015): 292–300. doi:10.1016/j.enggeo.2015.06.002.
Zhou, X.P., and H. Cheng. “Stability Analysis of Three-Dimensional Seismic Landslides Using the Rigorous Limit Equilibrium Method.” Engineering Geology 174 (May 2014): 87–102. doi:10.1016/j.enggeo.2014.03.009.
Zhou, X.P., and H. Cheng. “Analysis of Stability of Three-Dimensional Slopes Using the Rigorous Limit Equilibrium Method.” Engineering Geology 160 (June 2013): 21–33. doi:10.1016/j.enggeo.2013.03.027.
Conti, Riccardo, and Giulia M.B. Viggiani. “A New Limit Equilibrium Method for the Pseudostatic Design of Embedded Cantilevered Retaining Walls.” Soil Dynamics and Earthquake Engineering 50 (July 2013): 143–150. doi:10.1016/j.soildyn.2013.03.008.
Shamsabadi, Anoosh, Shi-Yu Xu, and Ertugrul Taciroglu. “A Generalized Log-Spiral-Rankine Limit Equilibrium Model for Seismic Earth Pressure Analysis.” Soil Dynamics and Earthquake Engineering 49 (June 2013): 197–209. doi:10.1016/j.soildyn.2013.02.020.
Wei, W.B., Y.M. Cheng, and L. Li. “Three-Dimensional Slope Failure Analysis by the Strength Reduction and Limit Equilibrium Methods.” Computers and Geotechnics 36, no. 1–2 (January 2009): 70–80. doi:10.1016/j.compgeo.2008.03.003.
Lu, L., Z.J. Wang, M.L. Song, and K. Arai. “Stability Analysis of Slopes with Ground Water During Earthquakes.” Engineering Geology 193 (July 2015): 288–296. doi:10.1016/j.enggeo.2015.05.001.
Morgenstern, N.R. “Evaluation of Slope Stability – a 25 Year Perspective.” International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts 30, no. 3 (June 1993): A195. doi:10.1016/0148-9062(93)93166-u.
Duncan, J. Michael, Stephen G. Wright, and Thomas L. Brandon. “Soil strength and slope stability.”, John Wiley & Sons, (2014).
Bobet, “A. Numerical methods in geo-mechanics.” The Arabian Journal for Science and Engineering, 35(1B), (2010) 27-48.
Bishop, Alan W. “The Use of the Slip Circle in the Stability Analysis of Slopes.” Géotechnique 5, no. 1 (March 1955): 7–17. doi:10.1680/geot.19184.108.40.206.
Janbu, N. "Application of composite slip surface for stability analysis." In Proceedings of European Conference on Stability of Earth Slopes, Sweden, 1954, vol. 3, pp. 43-49. 1954.
Spencer, E. “A Method of Analysis of the Stability of Embankments Assuming Parallel Inter-Slice Forces.” Géotechnique 17, no. 1 (March 1967): 11–26. doi:10.1680/geot.19220.127.116.11.
Morgenstern, N. R., and V. E. Price. “The Analysis of the Stability of General Slip Surfaces.” Géotechnique 15, no. 1 (March 1965): 79–93. doi:10.1680/geot.1918.104.22.168.
Pulat, H. F. “An experimental and analytical study of various soil slopes in laboratory conditions.” Master of Science in Civil Engineering İzmir Institute of Technology, (2009).
Cornforth, D. “Landslides in Practice: Investigation, Analysis, and Remedial/Preventive Options in Soils.” N.J.: J. Wiley, Hoboken, (2006).
Namikawa, Tsutomu, Shota Hiyama, Yoshiya Ando, and Taihei Shibata. “Failure Behavior of Cement-Treated Soil under Triaxial Tension Conditions.” Soils and Foundations 57, no. 5 (October 2017): 815–827. doi:10.1016/j.sandf.2017.08.011.
- There are currently no refbacks.
Copyright (c) 2019 Naeem Mangi
This work is licensed under a Creative Commons Attribution 4.0 International License.