PORE PRESSURE AND VOLUME CHANGE BEHAVIOUR DURING UNDRAINED AND DRAINED LOADINGS OF AN UNSATURATED SOIL

An apparatus has been constructed to observe the pore pressure and volume change characteristics of an unsaturated soil during constant water content loading, consolidation and increasing matric suction tests under a Ko-condition. The results show significant decrease in the pore pressure parameters when the degree of saturation decreases. The maximum past matric suction of the soil appears to have a significant effect on the soil behaviour during drained loading. (A) For the covering abstract see IRRD 881647.