MECHANISM OF SOIL BLOCK MOVEMENT AND THE ONE DIMENSIONAL NUMERICAL SIMULATION

Abstract

The present study treated the mechanism of soil block movement and the one dimensional numerical analysis of the movement.
The constitutive equation for the debris flow proposed by Egashira and Miyamoto was enhanced, and the constitutive equation for the flow of not only saturated material but dry one was concerned through theoretical and experimental investigations. For the soil block movement, inter granular solid friction is also important, and the typical difference from the debris flow is that the concentration of solid should not be change in case of soil block movement.
This may cause some difficulty to treat the solid friction in the numerical simulation. That is, the stop condition of movement of soil block should be taken into account in the finite differentiation of equation of motion. The results of numerical calculations were compared with experimental one, and we found that the calculation results were very closed to the experimental one. And, more over, several important characteristics of the soil block movement was investigated by numerical calculations.