Abstract:

The differences and relationships in compression index Cc and swelling index Cs of typical remolded Shanghai soft clay, measured using different test methods including isotropic compression-swelling tests and one-dimensional compression- swelling tests with or without K0 being measured, are studied. The deformation and strength of the soil are measured by drained triaxial compression tests, with different over-consolidation ratios and cell pressures. Also, the friction angle at critical state is determined from the test results. Finally, the coefficient of secondary consolidation of remolded Shanghai soft is studied using results of long-term oedometer tests with different vertical pressures. The parameters and preliminary conclusions from the above-mentioned investigations are valuable to engineering practices and establishment of constitutive model for Shanghai over-consolidated soft clay.

Key words: remolded Shanghai soft clay, compression index, swelling index, over-consolidation ratio, coefficient of secondary consolidation