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首页> 外文期刊>KSCE journal of civil engineering >New Permeable Structure for Controlling Debris Flows in the Wenjiagou Gully
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New Permeable Structure for Controlling Debris Flows in the Wenjiagou Gully

机译：文家沟沟中控制泥石流的新渗透结构

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Aimed to control debris flows more effectively, we attempt to develop a new structure called a “sloping roof grill dam”, which consists of guidance walls, separation grills and lateral deposit areas. A series of flume tests were performed to verify the function of this new structure, focusing on the trapping efficiency ( β ), deceleration efficiency ( μ ) and coarse-fine sediment separation extents ( η ) under different conditions of structure and debris flows. Experimental results show that both the trapping and deceleration efficiency increase with a decrease in permeability, whereas the separation extent shown the opposite effect. Multiple regression analysis indicates that β and η are linearly dependent on the permeability, deceleration efficiency and magnitudes of debris flow. In addition, an increase in beam gap can lead to an increase in the impact area downstream for the debris flow after the control of the structure. Finally, a two-level installation of the structure is tested to determine whether there is an enhancement of the debris control, which indicated that although the trapping effect of the two-level structure is considerably greater than that of a single-level structure (2.11 times at maximum), the separation extent of the two-level structure is not distinct and may be even lower.
机译：为了更有效地控制泥石流，我们尝试开发一种称为“倾斜屋顶格栅坝”的新结构，该结构由导向壁，分隔格栅和侧向沉积区域组成。进行了一系列的水槽测试以验证这种新结构的功能，重点是在不同结构和泥石流条件下的捕集效率（β），减速效率（μ）和粗细泥沙分离程度（η）。实验结果表明，捕集和减速效率均随渗透率的降低而增加，而分离程度则显示相反的效果。多元回归分析表明，β和η与渗透率，减速效率和泥石流大小呈线性关系。另外，在控制结构之后，束隙的增加会导致下游的泥石流的冲击面积增加。最后，测试了该结构的两层安装以确定是否增强了碎片控制，这表明尽管该两层结构的捕获效果比单层结构的捕获效果大得多（2.11最多两次），两级结构的分离程度并不明显，甚至可能更低。

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