泥石流体的沉积稳定浓度与颗粒级配之关系

沉积稳定浓度主要反映了泥石流固体物质的级配特点,它涉及到泥石流体的固体颗粒的大小和排列状况。利用这种浓度可确定泥石流体的粘滞系数、宾汉剪切力以及与泥石流颗粒级配有关的其他参数。分析了泥石流体的沉积稳定浓度与颗粒级配的理论关系,并用实验方法建立了它们的关系式。

STUDY ON THE RELATIONSHIP BETWEEN DEPOSIT DENSITY AND PARTICLE SIZE DISTRIBUTION OF DEBRIS FLOW

Deposit density is a new concept for debris flow,which shows the density of debris flow and on the other hand,reflects the particle size distribution in debris flow. In this paper,the characte ristics of deposit density and the scientific basis of specific surface area to stand for the particle size distribution were analyzed respectively. Then,the theoretic relationship between deposity,density and particle size distribution of debris flow was researched. Samples were obtained from moving flows in Jiangjia Ravine near Dongchuan City for measurement of deposit density, and specific surface area of debris flow. Finally,the equation of relationship between them was set up.