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为了解都江堰市龙池地区泥石流堆积扇的危害程度,实地测量了龙池地区36条已暴发的泥石流沟的堆积扇几何数据,分析了泥石流成因及堆积扇的特征,研究了泥石流堆积扇在堆积过程中的应力特征,得出了龙池地区泥石流堆积扇堆积长度、厚度和宽度等预测模型,并计算出龙池地区泥石流的屈服应力τ约为241Pa,沟口泥石流停淤深度hx0和hy0约为2.4m,与研究区野外观测数据相符,为强震区暴雨型泥石流灾害的防治提供了参考。
In order to understand the damage degree of debris flow fan in Longchi area in Dujiangyan City, geometrical data of 36 outflow debris flows in Longchi area were measured. The causes of debris flow and the characteristics of the accumulation fan were analyzed. The prediction model of debris accumulation length, thickness and width of debris flow in Longchi area was obtained. The yield stress τ of debris flow in Longchi area was calculated to be about 241 Pa, and the depth of debris flow arrest at Mizoguchi hx0 and hy0 Which is 2.4m, which is consistent with the field observation data in the study area, which provides a reference for the prevention and control of the heavy rain-induced debris flow disaster in the strong earthquake area.