膨胀土化学改良试验研究分析

膨胀土的改良是膨胀土工程地基处理研究领域中的重要课题之一，已受到岩土科学工作者和工程师的普遍关注。结合某公路膨胀土边坡防护工程，采用ESR生态改性剂进行膨胀土化学改良试验研究，探讨了膨胀土的化学改良机理和效果。结果表明，膨胀土经化学改性为非膨胀土，且由原来的亲水性变成憎水性，能达到较好的水稳定性，尤其是地表浅部的改性土能达到长期浸泡无崩解的效果。改性后的土体具有砂土的特征，各项强度指标大幅度提高，地基承载力有着明显的提高，并随着ESR生态改性剂喷洒次数的增加，其承载力逐步增大，在短时间内达到稳定值，最佳喷洒次数为3～4次。

Experimental study and analysis of expansive soil improved with chemical medicine

The improvement of expansive soil is an important lesson in the study of expansive soil subgrade treatment; so it has been concerned by the geotechnical researchers and engineers. Combined with slope treatment project of expansive soil on a highway, the chemical improving expansive soil by experiment with ESR ecotypic medicine is studied. Both of the mechanism and the effectiveness of improving expansive soil are analysed. It is discovered that the expansive soil become non-expansive after chemical treatment. The improved expansive soil has been changed from hydrophilicity to hydrophob!city and has good water stability. While the soil has the characteristic of sand and every strength index is largely increased. The foundation bearing capacity is also increased by the number of spraying; and the best spraying number is 3-4.