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水槽試驗與FLOW-3D於垂直跌水沖刷之探討

Scour from Vertical Drop through Flume Experiment and FLOW-3D

摘要


水流通過防砂壩或固床工後形成跌水,流動過程中高位能轉換成動能衝擊下游溪床形成沖刷坑,因而經常導致壩趾基礎淘空或是護坦受損,進而危害構造物安全。本研究藉FLOW-3D模擬垂直跌水之沖刷,並與水槽試驗做比較,將包含水理參數之沖刷坑因子納入壩體基礎深度設計考量,以提供未來防砂工程及消能設施規劃設計參考。

關鍵字

防砂壩 垂直跌水 FLOW-3D

並列摘要


Potential energy converted into kinetic energy through a vertical drop at the check dam or ground sill invariably attacks the creek bed and forms a scour hole. This phenomenon results in the removal of the base of a hydraulic structure or damage to the apron, and affects the safety of the structure. This study uses FLOW-3D software to simulate the dimension of the scour holes below a vertical drop, and compares this with the results of flume experiments. The inclusion of the scour factor with hydraulic parameters in the foundation depth of the check dam could be pertinent information for the design of energy dissipation facilities in the future.

並列關鍵字

Check dam vertical drop FLOW-3D

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