深层搅拌和旋喷法加固自重湿陷性黄土地基的讨论

A discusion on deep mixing and jet grouting methods used for improving the foundation of self weight collapse loess

就深层搅拌法和旋喷注浆法加固自重湿陷性黄土地基的机理和加固后地基承载力的确定方法进行了探讨，认为其加固作用主要是通过桩体将基础的全部荷载传递给位于深层处的非湿陷性土层，加固过程中，桩间土基本没有得到改善．因此在确定加固后的地基承载力时，不仅不能考虑桩间土的分担作用，而且还需计入桩侧负摩擦力的影响．最后给出了地基承载力的计算方法．

The mechanism of both deep mixing and jet grouting methods used for improving the foundation of self weight collapse loess is discussed and the bearing capacity analysis method of that foundation improved by them is presented as well. The main function of them is to transmit the load of footing to non collapse layers under the collapse ones. The soil between piles is not improved during construction and the bearing capacity of it should not be considered. The negative skin friction should be counted. A bearing capacity analysis method of this foundation is given in this paper.