混凝土芯水泥土搅拌桩在绕越高速公路东北段深厚软土地基中的应用

摘要

混凝土芯水泥土搅拌桩作为一种新型的高速公路软土地基加固方法，承栽力远远高于相同桩径的水泥土搅拌桩，其造价又比相应的钢筋混凝土桩低，且没有泥浆污染，应用推广前景广阔，有较好的经济效益和社会效益。结合南京绕越东北段高速公路先导段RY—DB3标，对混凝土芯水泥土搅拌桩的结构、作用机理和施工方法、质量控制、检测方法等做简单阐述。%As a new reinforcing method of soft soil in express way, Concrete-cored DCM （Deep Cement Mixing） pile has preferable economic and social benefit for its bearing capacity outclass DCM pile with the same diameter, and its cost is lower than corresponding concrete pile. It avoids slop pollution and has extensive applying foreground. This paper introduced the structure, effect mechanism, quality control, test mesures of Concrete-cored DCM pile connected with RY-DB3 bid of the Northeast segment of circle express way, Nanjing.