Dynamic response of debris flows impacting curved joint check dams  

作　　者：Dongpo Wang Xiaomei Zhang Wei Shen Aronne Armanini 

机构地区：[1]State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China [2]Department of Civil,Environmental and Mechanical Engineering,University of Trento,Trento 38121,Italy [3]Sichuan Province Geological Engineering Co.,Ltd.,Chengdu 610017,China [4]Department of Biological,Geological and Environmental Science,University of Bologna,Bologna 40126,Italy

出　　处：《International Journal of Sediment Research》2022年第5期589-600,共12页国际泥沙研究（英文版）

基　　金：funded by the National Natural Science Foundation of China(Grant No.41877266);the Science Foundation for Distinguished Young Scholars of Sichuan Province(Grant No.2020JDJQ0044);the State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Fund Research Project(Grant Nos.SKLGP2019K011 and SKLGP2021Z001);by Maccaferri China;part of the project PRIN 2015 of the Italian Ministry of University and Research“Mechanics of natural granular flows driven by gravity and engineering applications”。

摘　　要：The dynamic impact force of debris flow on dams with a curved upstream face curved was investigated using laboratory experiments and a theoretical approach.Equations describing the impact force and maximum run-up height were derived.The experiments and theoretical considerations reveal that the impact force and maximum run-up height are mainly controlled by the Froude number(Fr)reduced by the cosine of the channel slope angle(cosa).Both the impact force and the maximum run-up height have a quadratic relation with the modified Froude number(Fr/(cosa)^(0.5)).The experimental data and the results of the theoretical approach are in good agreement,indicating that the theoretical approach can be used in practical applications.It is concluded that the comparison between the curved-joint dam and the more conventional sharp-joint dam shows no differences in the maximum impact force and run-up height for the same modified Froude number.With the sharp-joint dam,the peak values of the impact force are reached more quickly than with the curved-joint dam.

关 键 词：Debris flow Curved-joint check-dam Impact force Maximum run-up height Impact response 

分 类 号：TV312[水利工程—水工结构工程] TV64