Rapid method of mechanical analysis of sands
Rapid method of mechanical analysis of sands
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砂土力学分析快速方法
DOI：
10.1306/d4269017-2b26-11d7-8648000102c1865d
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发表时间：
1938
影响因子：
2
通讯作者：
K. Emery
中科院分区：
文献类型：
--
作者：
K. Emery
本文提出了一种利用沉降速度对砂土进行力学分析的新方法，特别适用于船上与海洋有关的地质工作。由于粗颗粒比细颗粒在水中下降得更快，因此可以通过让物质通过长水柱并观察在连续的实验确定的时间间隔内到达柱底的物质的量来对沉积物样品进行机械分析。对于大多数沙子来说，完整的分析需要大约五分钟。除省时省力外，筛分的优点包括：(1)所得结果与沉积条件更密切相关，因为沙子在水中的实际沉积取决于沉降速度，而不仅仅是颗粒的大小。对相同的沙子样品进行筛分分析和试管分析的比较说明了这一点。(2)对于连续的频率曲线，可以获得数据，通过该曲线可以更全面地了解分选程度。
ABSTRACT A new method of mechanical analysis of sands employing settling velocities has been developed especially for use aboard ship in geologic work connected with the ocean. Since coarse grains fall faster in water than fine ones, a mechanical analysis of a sample of sediment can be made by allowing the material to settle through a long column of water and observing the amounts of material which reach the bottom of the column during successive experimentally determined time intervals. A complete analysis requires about five minutes for most sands. Among the advantages over sieving, other than saving in time and labor, are: (1) The results obtained are more closely related to conditions of deposition, since actual deposition of sand in water depends upon settling velocities rather than on mere size of grains. This is illustrated by a comparison of sieve and tube analyses of the same samples of sand. (2) Data can be taken for a continuous frequency curve by which a more complete picture of the degree of sorting can be found.