摘要:
泥石流的容重是泥石流的最重要的参数之一,用简单易行的方法获得泥石流的容重因泥石流灾害的评估和泥石流的防治的需要显得日益重要。分析了泥石流的组成颗粒中3个分别代表粗颗粒,细颗粒和粘粒颗粒的颗粒粒径,即2 mm、0.05 mm和0.005 mm,及它们的百分含量与泥石流容重的关系。在对泥石流的组成颗粒的研究中发现泥石流中的粗颗粒,细颗粒和粘粒颗粒的百分含量与泥石流容重都有一定的关系,但因地区的差异这种关系不是唯一的。粘性泥石流中的粘粒含量与物源区的粘粒含量相当,稀性泥石流的粘粒含量远大于物源区的粘粒含量。用粗颗粒和细颗粒百分含量计算的泥石流的容重与泥石流观测样和沉积样对比有较好的一致性。根据泥石流沉积物计算的泥石流容重应服从根据沉积物的特征判断的泥石流类型和框定的泥石流容重范围。
关键词:
-
泥石流 /
-
沉积物 /
-
容重 /
-
颗粒粒径 /
-
百分含量
Abstract:
The density of debris flows is the most important parameter of debris flows. It is more important to get the density of debris flows with the need of the evaluation and prevention the hazards of debris flows. In this paper, the size of coarse particle, fine particle and clay of debris flows, i.e. 2mm, 0.05mm and 0.005mm, and their percentage were analyzed for the relationship with the density of debris flows. The percentages of coarse particle, fine particle and clay of debris flows have certain relationships with density of debris flows, but they are not the unique because the difference of region. The percentage of clay in viscous debris flows is the same with the percentage of clay in the solid source of debris flows, but the percentage of clay in less viscous debris flows is much more than the percentage of clay in the solid source of debris flows. Comparing the living samples and deposit samples of debris flows with the calculating density of debris flows by the percentages of coarse particle and fine particle, it is good consistency. But the calculating density of debris flows must obey the density range obtained by the characteristics of deposit of debris flows.
点击查看大图
下载:
