發明
中華民國
093118764
I263722
減緩水流沖刷之方法
國立成功大學
2006/10/11
本保護工法僅需於橋墩前端加上一筐網結構物,即可達到極佳保護橋 墩功能。依橋墩試驗証明,於清水沖刷條件下幾近完全保護的功效; 於動床試驗下,最佳保護效果達到75%以上。此結果和現有文獻中之最 佳保護效果45%明顯增加甚多。 由跌水沖刷試驗,証明此種工法對於跌水下游之沖刷具有良好的減弱 效果,因此,其對於跨河攔水堰、攔砂壩之下游沖刷可以提供一經濟 且方便的保護工法。 結構體自身能造成極小的沖刷量,易於穩定。此筐網結構物可以使用 不同材質加以製成(如竹、柳枝、塑膠、不銹鋼網...),可視為一種生 態工法,不對環境造成衝擊。施工時可以和受保護結構同時進行,或 另外再加以固定於其上面,安裝容易。 The NT has a net body and a good permeability. The flow can easily pass through them and produce a large energy- dissipation. The NT is made from different material, e.g. bamboo, branches of willow, plastics or stainless steel... etc. The NT is very easy construction and can be fixed in the pier. When a NT was set at the front of pier, the energy forced the pier due to the flow could be reduced. For this reason the pier attains a good protection. From the experimental results, the pier can get an almost absolute protection, no scouring, under the clear-water conditions. For the live-bed conditions, the best protection effect can reach over 75% which is over the present records 45%. From the overfall scour test, this method can obtain a reduced scouring effect for the overfall downstream scour. This proves the NT provides an economical and convenient device for the protection of sediment control dam and impounding dam, which are across the river.
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