本文结合湖北省荆(门)宜(昌)高速公路第2合同段膨胀土地区路基施工实际，对膨胀土的特性、判别依据、改良措施、试验检测、施工方法进行了较为详尽的总结，以探讨膨胀土地区路基施工技术。

Taking the practice of the construction of the roadbed in swelling soil area in the second contract section of Jingyi expressway in Hubei province, the paper provides a detailed summary of the properties，judging basis, improving measures, experiment and test of swelling soils and the construction methods of roadbed in such soil, so as to make discussions on the construction technology of roadbed in swelling soil area.