高速公路膨胀土路基改良的试验和分析

Experiments on Improving Expansive Soil Roadbed of Highway

摘要: 对膨胀土路基填料存在问题进行探讨分析。以广东某高速公路为例，对比了膨胀土路基填料改良的试验方法及其效果，提出了掺石灰和粉煤灰等方案的最佳选用建议。试验分析表明，对膨胀土改良的测试和评价不宜采用单一方法，应根据膨胀土的胀缩等级、地方材料及施工工艺等进行综合技术与经济比较，选定最优方案。

Abstract: In this paper, the problems from using expansive soils as filling material in highway roadbed construction were discussed. Based on the investigations on chemical, physical and mineral features of expansive soils, the best scheme of mixing lime or powdere