谈谈塑性图及其在我国的应用问题

Discussions on Plasticity Chart and its Application Problems in China

本文讨论了在塑性图问题上我国专家们的两种意见,即细粒土不用塑性图按塑性指数单一指标分类,还是用塑性图按液限和塑性指数两个指标分类。分析了塑性图及其在我国应用中存在的问题。细粒土用塑性图分类是国际主流,在国家标准《土的分类标准》修订时,对是否将其列入的问题主张采取慎重态度。《土的分类标准》是岩土工程的基础性技术标准,影响很大,宜立足国内,面向广大工程技术人员,优先考虑采用我国工程界习惯采用的分类方法。

Two opinions about plasticity chart of experts in China are discussed in this paper. One opinion is that classification of fine-grained soil should be based on one index, i.e. plasticity index, not plasticity chart; the other is that classification of fine-grainod soil should be based on plasticity chart and use two index, i.e. liquid limit and plasticity index. The application problems of plasticity chart in China are discussed. The plasticity chart is used in many countries in classification of fine-grained soil. It is thought that it should be careful in making decision whether plasticity chart should be used when the national code of soil classification is revised, because soil classification is the basical code of geotechnical engineering. So the soil classification used should be the one, which is familiar to engineers in China.