Discusses the principle and grade division of collapsible loess,introduces the treatment for the foundations in collapsible loess areas, and analyzes common problems in the treatment,so as to provide further and more integrated foundation treatments in the areas.%论述了黄土的湿陷原理及等级划分，介绍了湿陷性黄土地区的地基处理方式，并对各处理方式中经常出现的问题进行详细分析，为湿陷性黄土地区提供更多、更全面的地基处理方式。
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