旋喷桩在既有线改建挡土墙软弱地基处理中的应用

既有线扩能改造工程，要求在不影响正常运营条件下进行施工。结合成昆铁路西昌南站新建联络线与电专线相接的挡土墙软基处理工程实例，经工程措施的比选，采用了旋喷桩处理措施，实践证明效果显著。

Application of Jet Grouting Pile in Soft Retaining Wall Foundation Treatment for Reconstruction of Existing Line

It is required for expansion and reconstruction of existing line to be carried out without any influence on normal operation.Combining with the project of soft foundation treatment for the retaining wall which is the junction between the newly built connecting line at South Xichang Station of Chengdu-Kunming Railway and the private wire circuit，jet grouting pile was adopted as the countermeasures through comparison.The practice has proved that the effect is prominent.