級配開孔率對土壤-地工不織布過濾行為之影響
學年 90
學期 1
發表日期 2001-08-30
作品名稱 級配開孔率對土壤-地工不織布過濾行為之影響
作品名稱（其他語言） The Influence of Soil-Nonwoven Geotextile Filtration Behavior by the Opening of Gravel Block
著者 吳朝賢; 張柏壽; 顏允威
作品所屬單位 淡江大學土木工程學系
出版者
會議名稱 第九屆大地工程學術研討會=9th Conference on Current Researches in Geotechnical Engineering
會議地點 桃園縣, 臺灣
摘要 坡降比試驗(Gradient ratio test, GR test)為評估土壤-地工織物阻塞潛能的方法之一，但此試驗並無考慮織物與粗顆粒排水層接觸之影響，因此坡降比試驗可能低估系統之阻塞潛能。本研究參考並修改ASTM D5101-90的水力坡降比試驗，設計可模擬現地試驗之透水試驗儀。並使用不同直徑之鋼珠以模擬粗顆粒排水層，進行過濾試驗，以探討織物下游粗顆粒排水層對阻塞潛能的影響。試驗結果顯示：最終滲流量之比例，並未與鋼珠底層開孔率之比例相同。而不同鋼珠直徑，開孔率相同時其GR值之差異並不大，顯示系統之阻塞應為底層開孔率所控制。 Gradient ratio test is one of the methods for evaluating the clogging potential of soil-geotextile system. However, GR test does not attend to the influence of clogging due to contact area existed between geotextile and coarse grain drainage layer. Gradient ratio test might underestimate the clogging potential of the drainage system. This paper aims to modify the hydraulic gradient ratio test of ASTM D5101-90, so that the permeable test apparatus can imitate the field condition and assess the influence of coarse grain drainage layer on clogging potential. The results of experiment show: the final seepage rate of the flow is not proportional to the opening area of the contact bottom. Bead of different sizes may form into the same opening area. However, GR does not change a lot as long as opening area remains the same. It shows that opening area instead of the bead size controls the clogging potential of drainage system.
關鍵字 級配;地工織物;孔隙率;過濾;坡降比;Gradation;Geotextile;Porosity;Filtration;Gradient Ratio
語言 zh_TW
收錄於
會議性質
校內研討會地點
研討會時間 20010830~20010901
通訊作者
國別 TWN
公開徵稿 Y
出版型式 紙本
出處 第九屆大地工程學術研討會論文集=Proceedings of 9th Conference on Current Researches in Geotechnical Engineering
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