Shaking table tests on the mitigation of liquefiable ground effects by well-point dewatering
CHEN Yulong1, ZHANG Ke2
1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China;
2. Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China
Abstract：The liquefaction resistance of saturated, sandy foundations can be improved by reducing the saturation. The well-point dewatering method was used to lower the saturation of the subsoil using vertical, horizontal, inclined and combined drainage pipes arrangements. The horizontal arrangement gave the best liquefaction resistance with the lowest induced excess pore pressure during the shaking. In engineering practice, the dewatering method can be used at regular intervals to reduce the liquefaction possibility.
陈宇龙, 张宇宁. 非塑性细粒对饱和砂土液化特性影响的试验研究[J]. 岩土力学, 2016, 37(2):507-516. CHEN Y L, ZHANG Y N. Experimental study of effects of non-plastic fines on liquefaction properties of saturated sand[J]. Rock and Soil Mechanics, 2016, 37(2):507-516.(in Chinese)
[2]
MARASINI N P, OKAMURA M. Numerical simulation of centrifuge tests to evaluate the performance of desaturation by air injection on liquefiable foundation soil of light structures[J]. Soils and Foundations, 2015, 55(6):1388-1399.
[3]
OKAMURA M, SOGA Y. Effects of pore fluid compressibility on liquefaction resistance of partially saturated sand[J]. Soils and Foundations, 2006, 46(5):695-700.
[4]
UNNO T, KAZAMA M, UZUOKA R, et al. Liquefaction of unsaturated sand considering the pore air pressure and volume compressibility of the soil particle skeleton[J]. Soils and Foundations, 2008, 48(1):87-99.
[5]
YOSHIMI Y, TANAKA K, TOKIMATSU K. Liquefaction resistance of partially saturated sand[J]. Soils and Foundations, 1989, 29(3):157-162.
[6]
XIA H, HU T. Effects of saturation and back pressure on sand liquefaction[J]. Journal of Geotechnical Engineering, 1991, 117(9):1347-1362.
[7]
OKAMURA M, TAKEBAYASHI M, NISHIDA K, et al. In-situ desaturation test by air injection and its evaluation through field monitoring and multiphase flow simulation[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2011, 137(7):643-652.
[8]
ESELLER-BAYAT E, YEGIAN M K, ALSHAWABKEH A, et al. Liquefaction response of partially saturated sands. I:Experimental results[J]. Journal of Geotechnical & Geoenvironmental Engineering, 2013, 139(6):863-871.
[9]
HE J, CHU J, IVANOV V. Mitigation of liquefaction of saturated sand using biogas[J]. Geotechnique, 2013, 63(4):267-275.
[10]
YEGIAN M K, ESELLER-BAYAT E, ALSHAWABKEH A, et al. Induced-partial saturation for liquefaction mitigation:Experimental investigation[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2007, 133(4):372-380.
[11]
KURIKI A, TAMURA S, ZHOU Y, et al. Centrifuge model test of liquefaction countermeasure for existing houses[C]//Proceedings of the 47th Conference of Japanese Geotechnical Society. Hachinohe, Japan:The Japanese Geotechnical Society, 2012:1497-1498.
[12]
YAN X, YUAN J, YU H, et al. Multi-point shaking table test design for long tunnels under non-uniform seismic loading[J]. Tunnelling and Underground Space Technology, 2016, 59(10):114-126.
[13]
XU H, LI T, XIA L, et al. Shaking table tests on seismic measures of a model mountain tunnel[J]. Tunnelling and Underground Space Technology, 2016, 60(11):197-209.
[14]
MOGHADAM M R, BAZIAR M H. Seismic ground motion amplification pattern induced by a subway tunnel:Shaking table testing and numerical simulation[J]. Soil Dynamics and Earthquake Engineering, 2016, 83(4):81-97.
[15]
HAMAYOON K, MORIKAWA Y, OKA R, et al. 3D dynamic finite element analyses and 1g shaking table tests on seismic performance of existing group-pile foundation in partially improved grounds under dry condition[J]. Soil Dynamics and Earthquake Engineering, 2016, 90(11):196-210.
[16]
LIU J, LIU F, KONG X, et al. Large-scale shaking table model tests on seismically induced failure of concrete-faced rockfill dams[J]. Soil Dynamics and Earthquake Engineering, 2016, 82(3):11-23.
[17]
BAO X, MORIKAWA Y, KONDO Y, et al. Shaking table test on reinforcement effect of partial ground improvement for group-pile foundation and its numerical simulation[J]. Soils and Foundations, 2012, 52(6):1043-1061.
2018, Vol. 58 
