水泥土搅拌桩法在连云港海相软土地基中的应用

水泥土搅拌桩加固软土地基，其固化剂品种、掺量及施工工艺等都是影响桩身质量的重要因素。这里介绍了连云港海相软土地基水泥土搅拌桩法（湿法）加固的现场研究情况。试验结果表明，连云港海相软土地基宜选用矿渣水泥作固化剂，且掺入量不应小于21 %；采用变掺入量工艺（上多下少）有利于提高桩身上部的质量，改善桩的工作性能。研究结果对于类似工程软土地基的水泥土搅拌桩处理具有指导意义。

Application of cement deep mixing method in Lianyungang marine soft soil foundation

For the improvement of soft soil foundation by cement deep mixing method,the principal factors influencing column quality are the types of solidification agent,the addition ratio of mixed cement and construction technique.Authors briefly introduce the field experiment and the test results carried out in the improvement of Lianyungang marine soft soil foundation by cement deep mixing method.This research indicates that slag cement should be chosen as solidification agent for the treatment of Lianyungang marine soft soil,and the ratio of addition should be more than 21 %;adopting the grouting technology of variation of cement addition along the column shaft(more cement addition in the upper section than the lower part) can improve the column quality of the upper part and the working property.The research would be potential reference to the similar engineering.