关键词: 国标(GB/T 50123-2019), 美标ASTM, 颗粒分析, 液限, 土的分类

Abstract: In a foreign geotechnical investigation project, the geochemical test results are required to be provided in accordance with both the Chinese national standards (GB/T 50123-2019) and United States standards (ASTM). The major differences in these standards are in three aspects, namely, grain size distribution, liquid limit, and soil classifications. The sieve analysis and the liquid limit tests are performed on the same soil sample according to the Chinese national standard and US standards, respectively. The results show that: (1) Under the sieve analyses on the same soil sample, the difference between both standards is within 5% and can be used interchangeably without significantly affecting the engineering results. (2) For the liquid limit results, a linear regression analysis is performed between the results using both standards. And a linear relationship exists. (3) After the relevant conversion of the grain size distribution analysis and the liquid limit between the Chinese national standards and the US standards, the soil classification name conversion can be converted accordingly.

Key words: National Standard （GB/T 50123-2019）, American Standard ASTM, Grain Size Distribution Analysis, Liquid Limit, Soil Classification