固床工間距之調查與研究（II）

Investigation and Study on the Interval of Groundsill in Wildstream

游繁結(Fan-Chieh Yu) ； 張則安(Tzer-Anne Chang)

《中華水土保持學報》 25卷4期 (1994/12) Pp. 219-229

https://doi.org/10.29417/JCSWC.199412_25(4).0005

摘要

以往固床工間距之推估多以經驗方法求得，本文嘗試以室內試驗與野外調査資料爲依據，配合相關理論之推導，盼能對固床工間距做推估，尋求一可供應用之推估式。本文係在滲流影響極小之情形下，以清水流對三組均匀砂及二組非均匀砂進行沖刷試驗。經試驗結果顯示d_(50)爲一適宜之代表粒徑，且固床工間距之減小確有降低水流剪力及減少淘砂量之功能。由本文推估方法所推算之固床工間距與現場間距部份吻合，然此一結果需有更多野外資料及進一步之試驗加以驗證之必要。

關鍵字

固床工

並列摘要

Usually, the interval of groundsill works were designed with experience in past. The study is going to find a suitable equation with laboratory experiment, and field investigation to decide the interval of groundsill works. The laboratory experiments proceeded in a movable boundary by clean water with three kinds of homogeneous particles and two kinds of nonhomogeneous particles, without concerning the seepage. The experimental results indicated that d_(50) was a suitable parameter to represent the sediment of stream for caculating the interval of groundsills. And the reduction of groundsills' interval could reduce the scouring on stream bed. A part of groundsills' intervals on field were proved to be coincided with the estimation by the derived equation. However, it is necessary for more field investigated data and advance experiments to support this derived equation.

並列關鍵字

Groundsill Works