TRIAXIAL TESTS ANALYSIS OF HANGZHOU XIASHA SILTS

Located in the east of Hangzhou, Xiasha is one of the main economic development zones of the new times when Hangzhou is advancing towards the Qianting River Era from the West Lake Era.The main soil stratums around the 14 meters depth are sandy silts formed by recent alluvial deposit of Qianting River,with special engineering properties and variability.An series of triaxial tests were performed on undisturbed,disturbed and remolded specimens of Hangzhou Xiasha silts. The results of the investigation showed that silt samples are easily disturbed, and their undrained strength cannot be used to predict in situ behavior. The stress-strain-strength of undisturbed specimens exhibit work softening, while that of disturbed specimens exhibit work hardening. In addition, the pore water pressure increases to a peak and then gradually and continuously decreases with strain, and specimens have tendency to dilate during shear . These fingings would provide more knowledge about Xiasha Silt characteristics, and could be used as reference for general engineering.