ZHOU Wenbing,LIU Jinfeng,WANG Dong,et al.Study on Regulating Discharge Process of Viscous Debris Flow by Window⁃frame Dam[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(05):1120-1128.
ZHOU Wenbing,LIU Jinfeng,WANG Dong,et al.Study on Regulating Discharge Process of Viscous Debris Flow by Window⁃frame Dam[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(05):1120-1128. DOI: 10.13409/j.cnki.jdpme.201906052.
Study on Regulating Discharge Process of Viscous Debris Flow by Window⁃frame Dam
In this paper, a series of flume experiments were conducted to investigate the regulating characteristics of discharge of window-frame dam on viscous debris flow, and the control process is preliminarily analyzed by numerical simulation. The results show that the discharge regulation effect of the window-frame dam on viscous debris flow is reflected in reducing the peak discharge of debris flow and the delay effect. Under different working conditions, the control ability of the window-type dam to viscous debris flow differs. The reduction rate of peak discharge of debris flow is negatively correlated with the relative opening width, aspect ratio, area ratio, as well as the slop of flume, and positively correlated with the bulk density of debris flow. However, the window-frame dam has little influence on debris flow with low density. The discharge regulation effect of the window-frame dam on viscous debris flow results from the interaction between the solid part and the opening part of the window-frame dam. The window-frame dam blocks debris flow through the solid part and reduces the velocity of debris flow, which causes the velocity of debris flow to be “redistributed” in the reservoir, and then the opening of dam can be used to drain the flow in a controllable way. Under this mechanism, the discharge control effect of the window-frame dam on the viscous debris flow is exerted.
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