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標題: 防砂壩沖刷坑消能元鼎塊之試驗研究
A Study on the Energy Dissipation Hexa-hallow Tri-leg Structure for the Scouring Hole of the Check Dam
作者: 李榮著
Lee, Jung-Cho
關鍵字: check dam;防砂壩;scouring hole;沖刷坑
出版社: 水土保持學類
刷 坑與淤積堆形狀鋪設,以求取較佳的元鼎塊排列方式。文中每種元
鼎塊 鋪設方式, 在固定有效壩高 15cm、清水流流況下,皆採用四種
渠槽坡 度和五種流量試驗之。最下游排元鼎塊則分別高出原河床 2cm
、4cm 及 6cm。 根據試驗結果發現,消能效率與流量成反比
,與渠槽坡度成正比; 殘餘能量與流量成正比,與渠槽坡度成反比;
而最下游排三種不同高度 元鼎塊之影響性雖差不多,但皆比不鋪排時
效果佳,且可防止對模擬坑 內護坦下之河床淘刷,故施工時可考慮適

This study simulates the natural scouring hole and it'
s depositing heap to use the hexa-hollow tri-leg structure
as the apron of the check dams and to search the better way
to place them. The experiment conducted under the non-
sediment flow with fixed dam height of 15cm. Every way of
laying the hexa-hollow tri-leg structure has four bed
slopes and five discharges to test. And the last row of
hexa-hollow tri-leg structure raised to be higher 2cm,4cm,
and 6cm, respectively, than the original river bed.
According to the results of experiments, we would find that
the energy dissipation efficiency has a positive correlation
with the bed slope,but a negative correlation with the
discharge. For the residual energy on the end of hexa-hollow
tri-leg structure, it happens to have the opposite situation.
The influence of the different height of the last row of
placed hexa-hollow tri-leg structure is nearly the same, but
anyway, the rise of the last row structure is better. So we
can consider to raise it properly.
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