中美英规范界限含水率试验差异及数据对比

Difference and data comparative of limit moisture content test in Chinese,American and British codes

界限含水率作为黏性土定名及状态划分的基本物理指标,在中、美、英规范中对其试验方法、评判标准均进行了说明。为更好地满足海外项目设计的需求,通过分析界限含水率在中、美、英规范中试验方法的差异性,采用规范中常用的方法分别进行试验,并结合代表性项目的工程经验,对试验结果进行对比分析。结果表明,中国规范与美、英规范方法测得的液限值之间存在一定的相关性,且英国规范与中国规范测得的液限差值范围为0.5%~3.0%,美国规范与中国规范测得的塑限差值一般小于2.0%。

Limit moisture content is used as the basic physical index to name and classify the state of cohesive soil,and the test methods and evaluation standards are explained in the Chinese,American,and British geotechnical codes.In order to better satisfy the needs of overseas project design,we analyze the differences in the test methods of the limit moisture content in Chinese,American and British codes,use the methods commonly used in the codes to conduct tests,and carry out a comparative analysis of the test results combining the engineering experience of representative projects.The results show that there is a certain correlation among the liquid limit measured by Chinese,American and British codes,and the difference of liquid limit between British and Chinese codes ranges from 0.5%to 3.0%.The difference of plastic limit between American and Chinese codes is generally less than 2.0%.