A New Triaxial Apparatus For Testing Unsaturated Soils

摘要

The stress-strain behaviour and small strain shear modulus of unsaturated samples have been measured in a newly designed stress path triaxial system. This new apparatus is capable of producing high quality stiffness-strain curves using local instrumentation in which strain levels span six orders of amgnitude from 1 microstrain. By achieving these high quality results it was possible to show that for unsaturated soil, indirect measurement of small strain stiffness by bender element ca nbe reliably obtained. Some peliminary results for constant water content tests on unsaturated silt are also presented.