SELECTION OF SOFT CLAY PARAMETERS FOR BANGKOK LOWLAND DEVELOPMENT

The  paper  stresses  the  importance  of  a  sound  understanding  of  the  soil behaviour in both the limit equilibrium and numerical  analysis  in soil- structure  interaction problems: deep foundation  for tall buildings;  foundation for elevated expressways, subways, ground  improvements  works,  tunnels  for water  supply,  natural  gas  supply,  sewerage  and drainage.  In  the  limit  equilibrium   analysis  the  use  of Hvorslev  strength   parameters  is suggested while for lightly overconsolidated  clays the strength to be referred as a frictional component.  In the numerical analysis a realistic stress- strain model for the behaviour of soft clays for stress states below the state boundary surface is recommended.