One dimensional consolidation and permeability tests considering stress history and rheological characteristic of soft soils

Several sets of 1-D consolidation and permeability tests considering stress history and rheological characteristic of soft soils were conducted by using GDS Advanced Consolidation Test System. A lot of curves have been presented, such as curves of settlement, pore water pressure, void ratio and coefficient of permeability, and some parameters of soft soils were derived by using curve fitting method. It is proved that rheological characteristic of Xiao-shan soft soils is remarkable. The time for pore water pressure dissipating completely is about 5 hours for normal consolidated soils, and the pore water pressure dissipating speed of overconsolidated soils is faster than normal consolidated soils. Stress history and OCR have obvious effects on the coefficient of secondary consolidation.