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对广州西二环高速公路石灰、水泥改良膨胀土的改性效果进行研究,采用静压成型方式,进行了无荷及有荷膨胀率试验,得到无荷、有荷膨胀率以及收缩系数与石灰、水泥掺量的关系,并分析了改良土收缩率与含水量的关系。通过分析得到:利用石灰处治膨胀土改性效果较水泥好,且经济性高;石灰改性后收缩系数和膨胀率明显减小;采用5%石灰掺量可以控制胀缩总率,达到处治目的;施工现场考虑各种因素,石灰掺量应增加1%。
The modification effect of limestone and cement-modified expansive soil in Guangzhou West Second Ring Expressway was studied. The static and dynamic pressure forming methods were used to test the unloaded and loaded expansion rate, and the unloaded, , Cement content, and analyzed the relationship between the shrinkage of modified soil and water content. The analysis shows that the treatment effect of expansive soil by lime is better than that of cement and the economy is high; the shrinkage coefficient and expansibility of limestone are obviously reduced; 5% lime content can control the total shrinkage and shrinkage, Construction site to consider various factors, the amount of lime should be increased by 1%.