DERIVATION OF SWCC AND PERMEABILITY COEFFICIENT FROM COMPACTION TEST BASED ON KITAMURA MODEL

摘要

The soil-water characteristic curve (SWCC) and the relation between permeability coefficient and suction (kw ～ su relation) are the most important relations for the mechanical properties of unsaturated soil. In this paper the relation between the SWCC, kw ～ su relation and soil compaction curve are theoretically derived by introducing the concept of effective degree of saturation and applying the numerical model for voids (Kitamura model). Then the soil compaction test on Toyoura sand is carried out to obtain the input parameters required for the numerical simulations of the SWCC and kw ～ su relation. The SWCCs obtained from the numerical simulations are compared with those obtained from soil tests on sandy soils. It is found that the numerical results are in good agreement with the SWCC and kw ～ su relation obtained from the soil tests.