https://scholars.lib.ntu.edu.tw/handle/123456789/162018
標題: | 速流管應用於快速地下排水之數值模式與現地試驗 | 作者: | 譚義績 | 關鍵字: | 地下排水;速流管;16 吋管;subsurface drainage;high speed drainage;16 inch pipe | 公開日期: | 2005 | 出版社: | 臺北市:國立臺灣大學水工試驗所 | 摘要: | 對於降雨,長久以來工程師熟練於明溝系統之設計,一般人們的認知也都著重在表面直接逕流量的部份處理是否得當,而往往忽略盲溝系統之設計,對於如何加速收集土壤入滲之滲透水量、如何快速消除學校操場、公園、運動場等由於降雨造成之積水常被疏忽不予重視。因此本研究計畫著眼點為「如何加速收集入滲之滲透水量」。國內外盲溝系統一般使用之集水管開孔率最大(max)為管徑表面積的8%,管徑愈大的集水管當然收集入滲水的速度及能力愈快愈好,但是實際在集水管內的排水流量是涓滴的極小流量。為了埋設大集水管,不但管材成本提高,也必須挖掘管溝,廢棄土方又容易造成環境污染。如果採用小的集水管,雖然管材成本降低,然而收集入滲水的速度亦相對降低。鑒於前述之結構於實際使用時仍有其缺點存在而予以重新設計一種地下集水與排水的裝置,使用小管徑的集水管並於集水管的兩側或一側設置有翼狀網板,藉由翼狀網板而達到集水與導流,藉此排水管的管徑就不需考慮其過大或過小之問題,而同時又能達到有效排水之目的,而施工經費亦可隨之降低。 本研究將以現地試驗配合數值模式,將翼狀網板結合小管徑集水管之集排水方式,與過去大管徑集水管之集排水方式做集排水效率及經濟效益比較,以期將試驗結果提供未來大面積廣場猓露地表埋設地下集排水管方式之參考。 For a long time, engineers are proficient in designing trench to treat the rainfall and runoff problem, but the design of groundwater drainage instrument is always ignored. This study focus on how to quickly eliminate the ponding on playground, park, or sport ground resulted from storms. Traditionally, bigger pipes (ex. 16 inch pipe) are used to collect the infiltration 1 water, but the efficiency does not linearly increase with the pipe radius. Moreover, using bigger pipes cost more and the accompanied abandoned soil can easily cause environmental pollution. However, using smaller pipes can expend less, but also decrease the speed of collecting infiltration water. To improve the groundwater drainage instrument, this study designs a new high speed drainage instrument, using smaller pipes with two sides of wing-shaped net plate. The wing-shaped net plate is designed to quickly collect infiltration water and then conduct it to the pipes. This kind of instrument can decrease the construction expense and also collect and drain infiltration water efficiently. This research will study the different drainage efficiency and economic benefit between tradition bigger pipes and the new instrument proposed in this study by using numerical modeling and in-situ tests. The result may be useful to future design of groundwater drainage instrument in large naked area.. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/29386 | 其他識別: | 932622E002023CC3 | Rights: | 國立臺灣大學水工試驗所 |
顯示於: | 生農、工學院附設水工試驗所 |
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932622E002023CC3.pdf | 2.43 MB | Adobe PDF | 檢視/開啟 |
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