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目前,由于土的分类体系的原则和标准不尽相同,以致会遇到同一种土按不同指标划分得到两种名称,尤其是对粘粒含量较少的轻亚粘土或粉砂土。由于测试方法等原因其粘粒含量和塑性指数相关关系不密切,准确定名较困难。本文针对上述情况,结合天津某区场地发生液化的条件,进行了颗粒分析和塑性试验对比,探求正确的分类方法,从而提出砂与粘土的界限值及粉砂与轻亚粘土工程分类定名的建议。
At present, because the principles and standards of the soil classification system are not the same, it will be encountered that the same soil will be divided into two types according to different indicators, especially for light sub-clay or silty soil with less clay content. Due to the test method and other reasons, the correlation between clay content and plasticity index is not close, and it is difficult to determine the exact name. This paper aims at the above situation and combines the conditions of liquefaction in a certain district of Tianjin. It compares the particle analysis and plasticity tests to find the correct classification method, and puts forward the limit value of sand and clay and the suggestion of classification of silt and light subclay. .