附加浮筒之虹吸排砂可行性研究

Sediment Removal Efficiency of Siphon Dredging with Float Tank

陳樹群(Su-Chin Chen) ； 王順昌(Shun-Chang Wang)

《中華水土保持學報》 32卷1期 (2001/03) Pp. 35-44

https://doi.org/10.29417/JCSWC.200103_32(1).0005

摘要

水力排砂運轉操作是水庫除淤以達到水資源永續利用之重要方法。由於傳統之虹吸工法在應用上有吸頭堵塞及工作船曳引之顧慮。而附加浮筒之虹吸排砂係利用虹吸工法並配置浮筒，利用虹吸負壓與浮力互動平衡作用進行排砂，經試驗結果已可改善傳統式虹吸除淤之部分缺點。當浮筒直徑約爲吸口管徑之3.2倍及吸口離底床約爲吸口管徑之1/4距離時，可得較佳之除淤效果。平均除淤含砂量可達20％（重量比）以上，且吸口管徑越大或虹吸水頭差越大均可提高除淤效率，因此本研究之各項裝備若能有水庫現有設施配合，極具高效率排淤之可行性。

關鍵字

虹吸排砂 ； 水庫除淤 ； 浮筒

並列摘要

The reservoir sediment removal by hydraulic dredging is one of the important methods to maintain the reservoir water resource for sustainable development. In the traditional siphon dredging, the end of suction conduit usually was blocked with debris, and barge often had damaged. For the purpose, the experimental results on siphon dredging with float tank using the equivalence between siphon pressure and buoyancy indicated that it can improve the disadvantages on the application of traditional siphon dredging. It can get a better dredging efficiency over 20% of sediment concentration (ratio of weight) if the float tank diameter is about 3.2 times of the diameter of suction conduit and the suction end is hung from the reservoir bed about 1/4 of diameter of the conduit. Increasing the suction conduit diameter or suction end can raise the dredging efficiency. Suitable instruments are available for the reservoir sediment removal.

並列關鍵字

siphon dredging ； reservoir sediment removal ； float tank