边坡管涌现象与临界水力坡降关系之研究成果报告精简版.pdfVIP

行政院國家科學委員會專題研究計畫 成果報告 邊坡管湧現象與臨界水力坡降關係之研究 研究成果報告(精簡版) 計 畫 類 別 ：個別型 計 畫 編 號 ：NSC 98-2221-E-033-039- 執 行 期 間 ：98年08月01日至99年07月31日 執 行 單 位 ：中原大學土木工程系 計 畫 主 持 人 ：張德鑫 計畫參與人員： 碩士班研究生-兼任助理人員：羅維清 博士班研究生-兼任助理人員：黃勝頂 公 開 資 訊 ：本計畫可公開查詢 中 華 民 國 99年10月31日 臨力降 The Study of Relationship Between Slope Piping and Critical Hydraulic Gradient 粒粒流 流力度値 來數數力降値 更更 力度値 利臨力降數粒流力 不度粒粒力度 行料c250 利 粒臨力降度不率 理論不率臨力降臨力降理論 數臨力降理論數數兩 力降理論數力降兩 度易 臨力度 率 Abstract The piping phenomenon means that soil particles move along the pathway among particles of the soil-body framework or when soil particles are taken out from the soil-body. The position of piping phenomenon occurs seepage outlet or inside of soil-body. In general, We come to obtain the Hydraulic Gradient by way of whole, but the data we got that is the average Hydraulic Gradient, and does not the Hydraulic Gradient of broken position. The research uses critical Hydraulic Gradient equation and GMS to observe the Hydraulic Gradient of soil particle in the piping phenomenon. Firstly, this research involves the model experiment on lab piping phenomenon. The experiment herein is adopted uniform size of sands that are selected out from serial number c250 standard sands, and gains critical hydraulic gradient values based on different inclination of slopes. Secondly, we build critical Hydraulic Gradient equation that is derived from movement equations. We modified it with the different porosity caused with the different consolid