STUDY OF BEHAVIOUR OF LARGE POST-LIQUEFACTION DEFORMATION IN SATURATED NANJING FINE SAND
PAN Hua1，CHEN Guoxing1，2，LIU Hanlong2
(1. Institute of Geotechnical Engineering，Nanjing University of Technology，Nanjing，Jiangsu 210009，China；
2. Geotechnical Research Institute，Hohai University，Nanjing，Jiangsu 210098，China)
Abstract：Laboratory tests on the large post-liquefaction deformation of saturated Nanjing fine sand were performed by using a hollow cylinder apparatus. The stress-strain relationship and the characteristics of excess pore water pressure after liquefaction were studied. It is found that the relationship between deviatoric stress and axial strain presented a sigmoid curve；and there is a good linearity relationship between normalized pore water pressure and deviatoric stress. On this basis，a constitutive model of stress-strain relationship and a dissipation model of excess pore water pressure are established. It is found that the results predicted by the two models are in good agreement with the experimental data. The influence of relative densities and confining pressure on the characteristics of liquefied soil are studied. The results show that the relative densities and initial effective confining pressure all have an important influence on the stress-strain relationship of liquefied saturated sand. However，the dissipation model of excess pore water pressure after liquefaction is only affected by the confining pressure.
潘 华1，陈国兴1，2，刘汉龙2. 饱和南京细砂液化后大变形特性试验研究[J]. 岩石力学与工程学报, 2011, 30(7): 1475-1481.
PAN Hua1，CHEN Guoxing1，2，LIU Hanlong2. STUDY OF BEHAVIOUR OF LARGE POST-LIQUEFACTION DEFORMATION IN SATURATED NANJING FINE SAND. , 2011, 30(7): 1475-1481.
2011, Vol. 30 
