关家川沟泥石流流体性质研究

泥石流流体性质不仅决定了泥石流的类型，而且是研究泥石流动力学特征、泥石流治理、泥石流危险性评价等方面的基础。通过分析泥石流堆积物颗粒粒度特征和一系列的定量指标可以分析泥石流流体性质。由于后期洪水作用下泥石流堆积物颗粒粒度特征发生了变化，再加上颗粒粒度分析中取样等因素影响使泥石流堆积物颗粒粒度分析结果难以反映泥石流流体性质。因此，泥石流流体性质不能仅仅依据泥石流堆积物颗粒粒度特征来确定，而应采用综合分析研究方法来确定泥石流流体性质。本文以关家川沟为例，采用堆积物颗粒粒度分析与相关定量指标相结合的方法，综合分析研究了关家川沟泥石流流体的性质。该分析研究方法对研究泥石流流体性质具有实际的工程意义。

STUDY OF THE FLUID PROPERTY OF THE DEBRIS FLOW IN THE GUANJIACHUAN VALLEY

The fluid property of the debris flow is the foundation to determined the type of the debris flow, and as well as provided the foundation of the studying the dynamic property of the debris flow, the prevention and control of the debris flow, and the dangerous appraisal of the debris flow. by analyzing the size of the deposit of the debris flow can contribute to analyzing its fluid property. However, because of the effect of the flood on the later stage, the size characteristic of the deposit grain will change, and the factors in the analyzing grain size, such as the the process of sampling also will change the size characteristic. All of these would make the result of the analyzing grain size of the debris flow deposit very difficult to reflect the fluid property. The paper suggests that the study of the debris flow should not only depend on the size analysis, but should adopt the comprehensive analysis. The paper takes the valley of Guanjiachuan as an example to analyze the grain size of the deposit and the relevant quantitative indexes, and obtains the practice method for studying the fluid property of the debris flow.