关于二次变形模量试验的中德法规范对比*

针对海外工程采用不同规范而导致二次变形模量试验结果存在较大差异的问题，进行中、德、法规范的对比研究。从试验装置、试验过程、计算公式、结果分析等方面进行对比，并结合工程实例分析3个规范的适用范围。结果表明，中、德规范较为详细具体，试验过程和结果处理较为一致；法国规范则主要明确原则、方向，规定较为笼统，不利于指导现场试验，对于砂土地基，其计算结果偏于保守。建议在承接海外相关工程需要采用二次变形模量评价砂土地基处理效果时，宜优先采用中、德规范，避免采用法国规范。

Comparison for Chinese, German and French codes on second deformation modulus test

Aiming at the problem that the test results of secondary deformation modulus in some overseas projects are very different because of using codes of different countries, we carry out comparative study of Chinese, German and French codes.We compare the test device, test process, calculation formula and result analysis etc, and analyze the application scope of the three specifications combined with engineering examples.The results show that the codes of China and German are relatively detailed, and test process and result calculation of them are consistent.The French code mainly defines principle, direction, and norms are more general which is not conducive to guide field test.The result of secondary deformation modulus using French code is conservative for sandy soil foundation.It is suggested that when undertaking overseas projects which need to adopt secondary deformation modulus to evaluate treatment effect of sandy soil foundation, Chinese and German codes should be chosen firstly, and it is not recommended to select the French code.