拦砂坝作用下泥石流堆积模型实验研究  

Model Experimental Study on the Accumulation of Debris Flow under the Action of Check Dam

作　　者：李军 LI Jun(China Railway 15th Bureau Group Corporation Limited,Shanghai 200070,China)

机构地区：[1]中铁十五局集团有限公司,上海200070

出　　处：《价值工程》2022年第35期152-156,共5页Value Engineering

基　　金：国家自然科学项目(41602331)。

摘　　要：为了研究拦截过程中泥石流相关参数的定量变化,开展了拦沙坝作用下泥石流野外模型实验研究。实验结果表明:(1)拦砂坝对泥石流固体颗粒具有拦截及筛选效果,拦砂坝空库的效果最佳;(2)拦砂坝对延后泥石流到达下游的时间,空库时效果最佳;(3)拦砂坝对泥石流容重衰减幅度的工况优先级为:空库>半库>满库,得到了不同工况拦砂坝作用下的泥石流容重衰减模型。研究成果为优化拦沙坝的设计原则和方法奠定了一定基础。In order to study the quantitative changes of debris flow parameters during interception,the outdoor model experiment of glacial debris flow under the action of check dam was carried out. The experimental results show that:(1) Check dam has the effect of intercepting and filtering debris flow solid particles, and the empty reservoir of dam has the best effect;(2) For the time of delaying debris flow reaching downstream, the effect of empty reservoir is the best;(3) The priority of the dam to bulk density attenuation of the debris flow is empty reservoir > half reservoir > full reservoir, and the model of debris flow bulk density attenuation under different conditions is obtained. The research results lay a foundation for optimizing the design principles and methods of check dam.

关 键 词：泥石流 拦沙坝 模型实验 容重 

分 类 号：P642.23[天文地球—工程地质学]