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Effect of the Residual Excess Pore Water Pressure on the Slope Stability Subjected to Earthquake Motion  

Lee, Jun-Dae (Department of Civil Engineering, Semyung University)
Kwon, Young-Cheul (Geotechnical and Structural Department, Port and Airport Research Institute)
Bae, Woo-Seok (Department of Civil and Environmental Engineering, Chongju University)
Publication Information
Journal of the Korean Society of Safety / v.21, no.2, 2006 , pp. 107-113 More about this Journal
Abstract
Earthquake motion is one of the most significant influence factors on the slope stability. In this paper, an effective stress analysis with the elasto-plastic model was carried out to investigate the behavior of the slope stability subjected to the successive two strong earthquake motions, fore and main shock. The major influence of fore shock to the slope stability was considered as the existence of the residual excess pore water pressure. The paper presents the influence of the existence of the fore shock to slope stability using the numerical analyses. In conclusion, the excess pore pressure by the fore shock was not dissipated during the 7hrs of consolidation. By this residual excess pore water pressure, the factor of safety at the sliding face showed the minimum values, and the deformations of slope was large when compared with the case that considered the main shock only. Furthermore, the minimum of the factor of safety came out after the end of the earthquake motion.
Keywords
slope stability; residual excess pore water pressure; earthquake; liquefaction; effective stress analysis;
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1 송병무, '지진과 토목공학', 대한토목학회지, Vol. 30, No. 1, pp. 19-21, 1982
2 田中耕平, '長野縣西部地震における斜面崩壞の特徴', 土と基礎, 土質工學会, Vol. 33, No. 11, pp. 5-11, 1985
3 Oka, F., Yashima, A., Shibata, T., Kato, M., and Uzuoka, R.: FEM-FDM coupled liquefaction analysis of a porous soil using an elasto-plastic model, Applied Scientific Research, Vol. 52, pp. 209-245, 1994   DOI
4 Oka, F., Yashima, A., Tateishi, A., Taguchi, Y. and Yamashita, S.: A cyclic elasto-plastic constitutive model for sand considering a plastic-strain dependence of the shear modulus, Geotechnique, Vol. 49, No. 5, pp. 661-680, 1999   DOI
5 Japanese Geotechnical Society, 'The report of damage investigation in the 2003 Southern Sanriku earthquake and Northern Miyagi earthquake(In Japansese), 2003
6 건설교통부, '지진현황과 시설물 안전대책', 2005