云南省麻昭高速公路D3工区穿越膨胀土分布区,本文结合该工程案例,分析了膨胀土的工程特征,并对相应的膨胀土路基采用换填法和湿度控制法的施工技术要点进行了介绍.结果表明,采取该施工技术提高了路基软处理的工程质量,取得了较好的经济效益,为今后的膨胀土路基施工提供了有价值的参考.%Yunnan Mazhao highway D3 section area comes across the expansive soil area. Combined with this case, this paper analyzes the engineering characteristics of expansive soils, and briefly introduces the corresponding construction techniques of replacement method and humidity control method ued by expansive soil subgrade. The results show that this construction technology can improve engineering quality of soft roadbed treatment, and has achieved good economic results, providing valuable references for expansive soil subgrade construction in the future.
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