Prediction and characteristics of sand liquefaction for a highway in the region of Dongting Lake

Sand liquefaction hazards may occur in the Dong Ting Lake region for the great deal of sandy soil.The results of Sand liquefaction prediction are proposed by methods of standard penetration test(SPT),cone penetration test(CPT) and shear wave velocity test(SWVT),and characteristics of sand liquefaction are analysis.It has been shown that synthetically using the methods of SPT and CPT is suitable for estimating the liquefaction,and the method of CPT is more suitable.In the Dong Ting Lake region,with decreasing of the embedded depth of sandy soil,the index of liquefaction is increased,and the liquefaction grade is more severity.Liquefaction mainly occurred in the sandy soil with embedded depth less than 13.3 m,and the liquefaction grade is severity with embedded depth less than 5.95 m.