DDC 工法是处理湿陷性黄土地基的重要的方法之一,就是钻孔然后以不同填料、置换率施工工艺来处理不均匀地基。本文通过实例介绍了灰土挤密桩在处理地基过程中的成孔、夯填工艺等施工环节。该方法可以有效消除桩间土的湿陷性,桩体强度高,地基承载力强,工程造价低等优点。 DDC method is one of the important methods to deal with collapsible loess foundation. It is to drill and then treat the uneven foundation with different filling and replacement rate construction technology. In this paper, the construction process of the lime-soil compaction pile in the process of foundation formation, ramming and filling is introduced through an example. The method can effectively eliminate the collapsibility of soil between piles, the pile body has high strength, the bearing capacity of the foundation is strong, and the construction cost is low.