土の力学的性質および状態量について

抄録

An experimental result is reported in the present report of the plastic and viscoelastic properties of the Kanto loam and the hedoro. The Kanto loam is composed of allophane mineral, and the hedoro is deposit clay, composed of montmorillonite mineral. They are both nearly saturated with water in natural state. Their rheological properties can be explained mainly by the concept of the state of water respecting its energy in the soil pF.
From the results of three-dimensional stress relaxation test in the soil unsaturated with water in Fig. 3, it is shown that the stress σ₃ decreases with time, while the stress σ₁ increases nearly to be equal to σ₃. The elasticity of the undisturbed sample of the Kanto loam increases irreversibly with temperature.
The strength of soil S is defined by the state of stress applied to the soil particles. The state of stress p is the sum of the internal pressure p_i and the external pressure p_e. The internal pressure p_i is decided by the physico-chemical properties of the particles of the soil. Then, the state of stress in the soil water system can be determined by the thermo-dynamic treatment. And the relations among the strength and chemical potential of the water and the suction of clayey soil have been clarified.