山腹崩壊土の流動機構に関する研究

Abstract

The study concerns the slide motion and its transformation into debris flow for a soil massproduced by a slope failure. First, slide motions are investigated by flume experiments with para-meters; inclination angle, supply discharge, soil characters and geometric shape. Simultaneously, mass and momentum equations are formulated for a soil mass sliding on a slope, and the theo-retical solutions are obtained for the sliding velocity and location of a soil mass. Second, themechanism is discussed for the transformation of a soil mass from slide motion into debris flow.A theoretical method is obtained to predict the critical slide distance which dicide the location wherethe motion of soil mass is transformed into debris flow. Formulas are compared with flumeexperiments for a slide motion and its transformation into debris flow.