泥石流堆积物粒度分维的讨论

Discussion on Grain-size Fractal Dimension of Debris Flow Accumulations

在泥石流堆积物粒度分维原计算方法的基础上,改变研究对象和应用条件,进一步完善了计算方法,并对两种方法下求得的粒度分维进行比较。实例证明,利用改进后方法得到的粒度分维与泥石流堆积物土体的机械组成更相吻合,同时也反映了泥石流的搬运能力和破坏能力,体现了泥石流更多的特征。该研究是对泥石流堆积物土体机械组成和分形特征研究的补充,对泥石流堆积物特征和分形理论的研究都具有一定意义。

On the basis of traditional calculating method of debris flow grain-size fractal dimension,a new method was introduced to supplement the original one by changing the research object and preconditions in this article.Different relations were compared between grain-size fractal dimensions of debris flow accumulation calculated by different method and grain composition,fractal feature,etc.Examples validated that different several scale-variance and fractal dimensions existed when the new method was used.What's more,the fractal dimensions calculated by the new method are more consistent with the grain composition of debris flow accumulations,and reflect more debris flow characteristics,such as carrying and breaking capacity.This research is a supplement to the research of grain composition and fractal feature of debris flow accumulation and is significant to apply debris-flow fractal theory.