Low Gradient Permeability Measurements in a Triaxial System
Low Gradient Permeability Measurements in a Triaxial System
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DOI：
10.1680/geot.1985.35.2.145
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发表时间：
1985-06
期刊：
影响因子：
5.8
通讯作者：
H. W. Olsen;R. Nichols;T. L. Rice
中科院分区：
文献类型：
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作者：
H. W. Olsen;R. Nichols;T. L. Rice
在常规三轴系统中，通过流量泵以已知的恒定流速将水引入和抽出试样的底部，并通过用敏感的压差传感器监测在试样长度上引起的水头差，用流量泵法对砂土、桑迪粉土和粉质粘土试样进行渗透率测量。结果表明，以前报道的流量泵法的优点，与传统的恒定头和下降头的方法相比，实现了常规三轴设备中的渗透率测量。这些优点是，直接流量测量，避免了相关的错误，所产生的污染物的影响，毛细血管和长时间的流量测量所涉及的;渗透率测量可以得到更迅速，并在实质上更小的梯度;错误，从小截距，否则线性流量ve…
Permeability measurements were conducted with the flow-pump method on sand, sandy silt and silty clay specimens in a conventional triaxial system by introducing and withdrawing water at known constant flow rates into the base of a specimen with a flow-pump, and by monitoring the head difference induced across the length of the specimen with a sensitive differential pressure transducer. The results show that the previously reported advantages of the flow-pump method, compared with conventional constant head and falling head methods, were realized for permeability measurements in conventional triaxial equipment. These advantages are that direct flow rate measurements are avoided together with the associated errors that arise from the effects of contaminants on capillary menisci and the long periods of time involved in flow rate measurements; permeability measurements can be obtained much more rapidly and at substantially smaller gradients; errors from the small intercept in the otherwise linear flow rate ve...