粘性泥石流阻力和运动方程验证分析

EXPERIMENT AND VERIFICATION ON EQUATIONS OF RESISTANCE AND MOVEMENT OF VISCOUS DEBRIS FLOWS

现有的粘性泥石流阻力运动方程可以大致归纳为三类：一类是将泥石流视为固液两相流，通过理论分析建立的泥石流阻力运动方程；二类是认为粘性泥石流符合宾汉姆流体阻力方程；三类是依据泥石流体具有基本符合库伦公式的剪切强度，将泥石流视为固体颗粒散体重力流，在理论分析基础上建立的阻力和运动方程。用粘性泥石流动力学实验数据对三类阻力运动方程进行了验证，结果表明第三类阻力和运动方程与实际接近。

Existing equations on resistance and movement of viscous debris flows may be roughly divided into three types.The first one is based on the theory of two_phase flow of solid and fluid,and is deduced through experiment and analysing on debris flow,the second one is that viscous debris flows conincide the grag equation of Bingham fluid and the third one is that debris flows conicide the equation of solid granular flow.Verified through data from experiments on viscous debris flow,it is shown that the third one is closer to the practice of debris flows than the other two types.