以肯尼亚内罗毕南环线黑棉土为依托,在介绍不同膨胀土胀缩等级判定方法的基础上,结合X衍射试验、阳离子交换量试验和室内土工试验结果,对黑棉土的涨缩等级进行了判定。在此基础上针对当地现状,提出了合理的黑棉土涨缩等级分类方法。 Based on the black cotton soil of Nairobi South Ring Road in Kenya, based on the introduction of the method of judging the expansion and contraction of different expansive soils, combining the X-ray diffraction experiment, the cation exchange capacity test and the indoor geotechnical test results, determination. On the basis of this, aiming at the current situation in our country, a reasonable classification method of black cotton soils is proposed.