Cyclic triaxial test for an unsaturated soil with measurement of hydraulic conductivity

抄録

Implement or performance to unsaturated soil mechanism including concept of cyclic phenomena is necessary to prevent, decrease earthquake-induced great damages. Also, human soil structures such as road-embankment, railway-embankment and river dike have received strong rain fall, and the permeation induce increment of soil moisture and some deformation or settlement regard to safety factor. The experimental works and establish mathematical modelling for unsaturated soil is significant to realize the practice problems. This study aims to interpret unsaturated soil properties subjected saturation-unsaturation. The difference three experimental tests as hydraulic conductivity test, monotonic compression triaxial test and cyclic triaxial test were performed for a silt material, and low matric suction was controlled. The accurate measurement of volume shrinkage was accomplished, that change of void ratio was important factor to interpret the properties of apparent saturation silt. The repetition of saturation-unsaturation induced considerable influence to hydration conductivity and shear strength.