ANALYSIS OF UNSATURATED SOIL PARAMETERS AS SLOPE STABILITY MITIGATION
DOI:
https://doi.org/10.11113/jt.v79.11871Keywords:
Unsaturated soil, SWCC, Geo-Studio, slope stability, infiltration, rainfallAbstract
The pore water pressure is the essential factor and plays a key role in the unsaturated soil parameters. Experimental works and numerical analysis were conducted to determine the critical condition of the slope stability due to the evolution of shear strength parameters. The effect of infiltration on the pore water pressure was evaluated. The filter paper method was conducted to obtain the matric suction in various degrees of saturation. The mechanical properties of the undisturbed samples were examined through triaxial and permeability test, respectively. WRPLOT ViewTM was adopted to assess the intensity and duration of the actual rainfall. The applicability of the psycho-empirical method in SOILVISION Database to fit Soil Water Characteristic Curve (SWCC) was studied. GEO-SLOPE was used to assess the evolution of the pore water pressure and its effect on the safety factor of the slope. The evolution of pore water pressure induced the infiltration influenced the shear strength parameters and reduced the safety factor. The reduction 20% of cohesion was obtained and hence, the safety factor decrease to 1.0. The infiltration at the beginning of the wet season is the most critical condition that increases the soil moisture significantly.
References
Lim, T. T., H. Rahardjo, M. F. Chang, and D. G. Fredlund. 1996. Effect of Rainfall on Matric Suctions in a Residual Soil Slope. Canadian Geotechnical Journal. 33(4): 618-628.
Fredlund, D. G. and H. Rahardjo. 1993. Soil Mechanics for Unsaturated Soils. Canada: John Willey & Sons, Inc.
Muntohar, A. S. and H. J. Liao. 2010. Rainfall Infiltration: Infinite Slope Model for Landslides Triggering by Rainstorm. Natural Hazards. 54(3): 967-984.
Muntohar, A. S., J. Ikhsan, and H. J. Liao. 2013. Influence of Rainfall Patterns on the Instability of Slopes. Civil Engineering Dimension. 15(2): 120-28.
Muntohar, A. S., J. Ikhsan, and E. Soebowo. 2013. Mechanism of Rainfall Triggering Landslides in Kulonprogo, Indonesia. Geo-Congress 2013 © ASCE 2013. 452-461.
Muntohar, A. S., Muhammad Uradi, and Andy Fourie. 2014. Development A Boundary of Rainfall-Induces the Stability of A Residuals Soils Slope in Northern Territory , Australia. Seminar Nasional Geoteknik 2014. Yogyakarta. 133-137.
Karnawati, D. 2006. Pengaruh Kondisi Vegetasi Dan Geologi Terhadap Gerakan Tanah Dengan Pemicu Hujan. Media Teknik. 3: 12-22.
Mustafa, M. R., M. H. Isa, R. B. Rezaur, and H. Rahardjo. 2015. Data-Driven Modelling for Pore Water Pressure Variation Responses to Rainfall. Sustainable Development. 1: 447-55.
Rahardjo, H., E. C. Leong, and R. B. Rezaur. 2002. Studies of Rainfall-induced Slope Failures. Proceedings of the national seminar, Slope. April: 15-29.
Wang, Gonghui, Akira Suemine, Gen Furuya, Masahiro Kaibori, and Kyoji Sassa. 2005. Rainstorm-Induced Landslides at Kisawa Village, Tokushima Prefecture, Japan, August 2004. Landslides. 2(3): 235-242.
Haryanti, Sri, Kabul Basah Suryolelono, and Rachmad Jayadi. 2010. Analisis Pengaruh Karakteristik Hujan Terhadap Gerakan Lereng. Jurnal Ilmiah Semesta Teknika. 13(2): 105-15.
Subiyanti, H. 2007. Analisa Kelongsoran Lereng Akibat Pengaruh Tekanan Air Pori Di Saluran Induk Kalibawang Kulonprogo. Gadjah Mada University. Yogyakarta.
Pramusandi, Sony, Ahmad Rifa’i, and Kabul B. Suryolelono. 2015. Determination of Unsaturated Soil Properties and Slope Deformation Analysis Due to the Effect of Varies Rainfall. Procedia Engineering 125: 376-382.
Rifa’i, Ahmad. 2011. Effect of Matric Suction Changes on Unsaturated Soil Parameter Slope Stability Analiysis due to Rainfall. Seminar Nasional-1- BMTTSSI-Konteks. Sumatera Utara. G15-G23.
Muntohar, A. S., Muhammad Suradi, and Andy Fourie. 2014. Effect of Rainfall Intensity and Initial Matric Suction on the Stability of Residuals Soils Slope Effect of Rainfall Intensity and Initial Matric Suction on the Stability of Residuals Soils Slope. Proceeding 18th Annual Conference on Geotechnical Engineering. Jakarta. 231-236.
Suradi, M., A. Fourie, C. Beckett, and O. Buzzi. 2014. Rainfall-Induced Landslides: Development of a Simple Screening Tool Based on Rainfall Data and Unsaturated Soil Mechanics Principles. Unsaturated Soils: Research & Applications. (April 2016):1459-1465.
Hardiyatmo, H. C. 2006. Tanah Longsor Dan Erosi, Kejadian Dan Penanganan. Yogyakarta: Gadjah Mada University Press.
Kyi, Su Su. 2007. The Scoring System For Landslide Risk Microzonation and Mechanism of Weathered Tuff Layer In The Landslide Phenomena of Volcanis Area. Gadjah Mada University. Yogyakarta.
Vanapalli, S. K., D. G. Fredlund, D. E. Putahi, and A. Clifton. 1996. The Model for Matric, Prediction of Shear Strength with Respect to Soil Suction. Canadian Geotechnical Journal. 33: 329-392.
Gerard A, Miller, Khoury Charbel N, Muraleetharan Kanthasamy K, Liu Chunyang, and Kibbey Tohren C G. 2008. Effect of Soil Skeleton Deformation on Hysteretic Soil Water Characteristic Curve: Experiments and Simulations. Water Resources Research. 44(W00C06): 1-10.
Indrawan, I. G. B., H. Rahardjo, and E. C. Leng. 2006. Effect of Coarse-Grained Materials on Properties of Residual Soil. Engineering Geology. 82(3): 154-64.
Fu, Xiaoli, Mingan Shao, Dianqing Lu, and Huimin Wang. 2011. Soil Water Characteristic Curve Measurement without Bulk Density Changes and Its Applications in the Estimation of Soil Hydraulic Properties. Geoderma. 176-178: 1-8.
L’Heureux, J. S. 2005. Unsaturated Soils and Rainfall Induced Landslides. University of Oslo. Norwey.
Green, W. H. and C. A. Ampt. 1911. Studies on Soil Physic: Flow of Air and Water through Soil. J. Agr. Sci. 4: 1-24.
Chow, V. T, D. R Maidment, and L. W Mays. 1988. Applied Hydrology. Singapura: McGraw-Hill International Editions Civil Engineering Series.
Chen, L. and M. H. Young. 2006. Green-Ampt Infiltration Model for Sloping Surface. Water Resources Research. 42(W07420): 1-9.
Rawls, W. J., D. L. Brakensiek, and N. Miller. 1983. Green-Ampt Infiltration Parameters from Soil Data. Journal of Hydraulic Engineering. 109(1): 62-70.
Ho, D. Y. F. and D. Fredlund. 1982. Increase in Strength due to Suction for Hongkong Soils. Geotechnical Conference on Engineering and Construction in Tropical and Residual Soils. ASCE. Honolulu, Hawai. 263-95
Abramson, L. W., T. S. Lee, S. Sharma, and G. M. Boyce. 1995. Slope Stability and Stabilization Methods. New York: John Willey & Sons, Inc.
Triatmodjo, Bambang. 1996. Pelabuhan. Yogyakarta: Beta Offset.
Downloads
Published
Issue
Section
License
Copyright of articles that appear in Jurnal Teknologi belongs exclusively to Penerbit Universiti Teknologi Malaysia (Penerbit UTM Press). This copyright covers the rights to reproduce the article, including reprints, electronic reproductions, or any other reproductions of similar nature.
