Abstract The blocking of a window-frame dam and the discharge regulation are both important basic control features for characterizing the regulatory effect of a window-frame dam on debris flow. To better understand the regulatory effect of a window-frame dam on debris flow, physical model tests were carried out to investigate the flow pattern, trapping, and regulating characteristics when debris flow passed through a window-frame dam. The results revealed that the opening size of the dam and bulk density of the debris flow were the main factors affecting the blocking degree of the dam, followed by flume gradient. And a new comprehensive criterion for the blocking degree is proposed considering the multiple factors. Window-frame dams can regulate the discharge of debris flow to a certain extent under different conditions, and the control effect of discharge of viscous debris flow is not only reflected on the reduction of peak discharge, but also on the delayed effect of viscous debris flow. Moreover, the reduction rate of the peak discharge of debris flow is related to the blocking degree of the dam, which implies that designers should consider more factors in the determining the opening parameters of window-frame dams.

中文翻译：

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窗框坝在粘性泥石流控制中的堵漏调节作用试验研究

摘要 窗框大坝的堵截和流量调节都是表征窗框大坝对泥石流调节作用的重要基本控制特征。为了更好地理解窗框坝对泥石流的调控作用，开展了物理模型试验，研究了泥石流通过窗框坝时的流型、截留和调控特性。结果表明，坝体开孔尺寸和泥石流容重是影响坝体堵塞程度的主要因素，其次是水槽坡度。并在考虑多因素的情况下提出了一种新的阻塞度综合判据。窗框坝可以在不同条件下在一定程度上调节泥石流的排放，粘性泥石流排放的控制效果不仅体现在峰值流量的降低上，还体现在粘性泥石流的延迟效应上。此外，泥石流峰值流量的减少率与大坝的阻塞程度有关，这意味着设计者在确定窗框大坝的开孔参数时应考虑更多的因素。