本文選題：黏土 + 優(yōu)勢流��； 參考：《哈爾濱工業(yè)大學(xué)學(xué)報》2017年08期

【摘要】：裂隙為污染物(或降雨)入滲提供了重要的優(yōu)勢通道,裂隙與土體之間的水量交換是裂隙中優(yōu)勢流的重要形式,通過水量交換率進(jìn)行數(shù)學(xué)描述.而目前的研究主要針對砂土中的圓柱形裂隙,對于黏土中的平板形裂隙與黏土間水量交換率的研究目前處于空白.本研究針對黏土中裂隙的特點設(shè)計一套試驗裝置,通過含水量傳感器和張力計等測量系統(tǒng),定量研究裂隙-黏土間的水量交換率,并得到裂隙-黏土間的界面滲透系數(shù).研究發(fā)現(xiàn)水量交換率在滲透初期最大,隨著土中基質(zhì)吸力的降低而降低,裂隙-黏土間的界面滲透系數(shù)比土體的飽和滲透系數(shù)大一個數(shù)量級.當(dāng)土體的初始含水量不同時,隨著滲透的進(jìn)行,不同初始含水量土體中的水量交換率趨于一致,約為7×10~(-6)s~(-1).
[Abstract]:The water exchange between the fissure and the soil is an important form of the dominant flow in the fissure, which is described mathematically by the water exchange rate. However, the current research is mainly focused on the cylindrical fractures in sand, and the research on the water exchange rate between flat fractures and clay in clay is still blank. According to the characteristics of fracture in clay, a set of experimental device is designed in this paper. The water exchange rate between fracture and clay is quantitatively studied by measuring system such as water content sensor and tensometer, and the interfacial permeability coefficient between fracture and clay is obtained. It is found that the water exchange rate is the largest in the initial stage of infiltration and decreases with the decrease of the suction of the matrix in the soil. The interfacial permeability coefficient between the fissure and clay is one order of magnitude larger than the saturated permeability coefficient of the soil. When the initial water content of the soil is different, the water exchange rate in the soil with different initial water content tends to be the same, which is about 7 脳 10 ~ (-1) ~ (-1) ~ (-1).
【作者單位】： 哈爾濱工業(yè)大學(xué)深圳研究生院;武漢大學(xué)水利水電學(xué)院;
【基金】：國家自然科學(xué)基金(51379053)
【分類號】：TU442

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1 宋磊;粘土—裂隙間水量交換試驗研究[D];哈爾濱工業(yè)大學(xué);2015年

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本文編號：2007995