龙池地区“8．13”特大群发性泥石流堆积扇几何形态量化分析  

Study on Characteristics of Accumulation Fan of“8.13”Extraordinarily Debris Flow in Longchi Area

作　　者：屈永平[1] 唐川[1] 杨永红[1] 唐宏旭[1] 刘洋[1] 常鸣[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059

出　　处：《水电能源科学》2014年第3期171-174,共4页Water Resources and Power

基　　金：国家重点基础研究发展计划(973计划)(2011CB409903);国家科技支撑计划项目(2011BAK12B01)

摘　　要：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 harm level of debris flow accumulation fan in Longchi area of Dujiangyan City, we get geometric data of debris flow accumulation fan with field measurement of 36 ditches which has broken out debris flow, analyze its causes and characteristics. And then the stress characteristics of debris flow accumulation fan is studied during the process of accumulation. Finally, it obtains the prediction model of deposition length, thickness and stacking width of debris flow accumulation fan. Meanwhile, the calculation of yield stress of debris flow in this area is about 241 Pa, the silting depth of debris flow in gully is about 2.4 m , which consists with the filed observation data. Thus, it provides reference for debris flow hazards risk assessment in strong earthquake zone .

关 键 词：都江堰市龙池地区 泥石流 堆积扇 应力分析 

分 类 号：P642.23[天文地球—工程地质学]