泥石流冲击力的研究现状

Research Status and Development Trend of Debris-flow Impact Force

泥石流冲击力是泥石流动力特性的重要组成部分,也是泥石流支挡结构的设计依据。以泥石流冲击力为研究对象,对泥石流冲击力的计算模型以及野外实地观测研究进行阐述与分析。结果表明:现有的冲击力计算公式大多采用拟静力方式获取泥石流最大冲击荷载,未考虑泥石流冲击荷载的动态变化效应和时间效应;由于各种条件的限制,导致泥石流冲击力实测信号获取困难,这会限制泥石流防灾减灾工作的发展。

Debris-flow impact force is an important part of the debris-flow dynamic chara cteristics and it is the design basis of debris-flow supporting and retaining structure.Calc ulation models and field measurement research of debris-flow are introduced.A quasi-static way was used to get the maximum debris-flow impact force in most of the existing impact calculation models,the dynamic effects and time effects of debris flow were not taken into account.The acquisition of debris-flow impact force signal under real-world conditions has been a challenge due to various limitations.This will limit the development of debris-flow disaster prevention and mitigation work.