粘性泥石流扇状地发展过程实验研究

Experimental Study of Fan Development Process of Viscous Debris Flow

通过不同泥石流容重、不同堆积区坡度条件、不同水槽坡度条件的泥石流连续堆积实验共3组106次实验,定量地探讨了粘性泥石流扇状地发展过程的阶段性及其特征。以泥石流扇状地纵、横方向的平均堆积坡度为依据,将粘性泥石流扇状地的发展过程划分为三个发展阶段。第一阶段以扇状地在纵、横方向快速发展为特征。第二阶段扇状地纵向不再发展,以横向发展为主。第三阶段以扇状地纵向发展为主,横向发展缓慢。

This study quantificationally discussed the phased characteristics of fan development process of viscous debris flow based on 3 groups,106 indoor experiments under the condition of different debris flow densities,different slopes in the accumulation area and different channel slopes.Based on the average deposition slope of debris fan＇s cross-section and vertical-section,the development process of viscous debris fan can be divided into three stages.The first stage is characterized by rapid development in the longitudinal and transverse of debris fan.In the second stage,the longitudinal of debris fan will not develop and the debris flow will mainly develop in the transverse.The third stage is a longitudinal development stage.And the width of debris fan develops slowly in this stage.