Abstract
Rheological properties such as yield stress and viscosity is the main parameters to determine the fluidity of the debris flow. In this study, to evaluate effects of sand content and liquidity index (water content) on the rheological properties of fine-grained soils, several series of laboratory tests were performed on specimens with various sand contents of 0, 5, 10, and 15 % or with various liquidity indices ranging from 5 to 12.3. The flow behavior was strongly influenced by liquidity index (water content) and sand content. The overall shape of the flow curves of specimens had characteristics of a shear thinning fluid, with a decrease in viscosity as shear rate increased. The yield stress and viscosity gradually decreased as the liquidity index increased. At a given liquidity index, yield stress and viscosity of soil increased with an increase in sand content. Also, the yield stress and viscosity tend to increase with increasing concentration by volume(Cv) of the fluid matrix. The values of the four coefficients α1, α2, β1, and β2 were obtained by regression analysis for each fine-grained soil.
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References
Imran J, Parker G, Locat J, Lee H (2001) 1D numerical model of muddy subaqueous and subaerial debris flows. J Hydraul Eng 127(11):959–968
Locat J, Demers D (1988) Viscosity, yield stress, remoulded strength, and liquidity index relationships for sensitive clays. Can Geotech J 25:799–806
Locat J, Lee HJ, Locat P, Imran J (2004) Numerical analysis of the mobility of the Palos Verdes debris avalanche, California, and its implication for the generation of tsunamis. Mar Geol 203(3–4):269–280
Malet J-P, Laigle D, Remaitre A, Maquaire O (2005) Triggering conditions and mobility of debris flows associated to complex earthflows. Geomorphology 66:215–235
O’Brien JS (2003) Reasonable assumptions in routing a dam break mudflow. In: Rickenmann D, Chen CL (eds) Debris-flows hazard mitigation: mechanics, prediction, and assessment. Millpress, Rotterdam, pp 683–693
O’Brien JS, Julien PY (1988) Laboratory analysis of mudflow properties. J Hydraul Eng 114(8):877–887
Pierosn TC, Scott KM (1985) Downstream dilution of a lahar: transition from debris flow to hyperconcentrated streamflow. Water Resour Res 21(10):1511–1524
Takahashi T (1991) Debris flows. Balkema, Rotterdam, 165 p
Widjaja B (2011) Case study of mudflow using FLO-2D. In: Fragomeni S, Venkatesan S, Lam NTK, Setunge S (eds) Incorporating sustainable practice in mechanics of structures and materials. CRC Press, Leiden, pp 533–537
Acknowledgments
This research was supported by the Public Welfare & Safety Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Science, ICT & Future Planning (2012M3A2A1050977).
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Kang, HS., Kim, YT. (2014). Experimental Study on the Rheological Behaviour of Fine-Grained Soils with Sand Content and Liquidity Index (Water Content). In: Sassa, K., Canuti, P., Yin, Y. (eds) Landslide Science for a Safer Geoenvironment. Springer, Cham. https://doi.org/10.1007/978-3-319-04996-0_4
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DOI: https://doi.org/10.1007/978-3-319-04996-0_4
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