Behaviour of a tropical residual soil

摘要

This paper describes an experimental study on some basic properties of a Malaysia tropical residual soil. The true strains developed in the conventional triaxial loading system may be masked by deflections, which originate in the compliance of the loading system and loading measuring system. Such equipment compliance errors add to a variety of samples bedding effects to give a poor definition of the stress-strain behaviour of the material under compression or extension test, particularly over the small strain range. Most conventional triaxial tests therefore tend to give apparent material stiffness far lower than those inferred from field behaviour. The virtual infinite stiffness (VIS) axial loading system is a unique equipment whereby to the observer the axial loading system appears to have infinite stiffness to minimize the compliance errors occuring in the conventional triaxial testing system. Triaxial tests using VIS computer-controlled system to investigate the effect of sample size, relative density, over-consolidation ratio and elastic deformation parameters on the behaviour of a tropical residual soil is presented and discussed.