Testing Research Of The Saline Soil Soft Ground Improved By DJM Pile

The study is based on the project of dealing with the saline soil soft ground of Jia yu guan～An xi highway form Lian yun gang to Huo er guo si national highway. Depend on summarizing the prehuman of research fruit and through normal indoor experiment, the project characteristic of Jia An senior highway saline soil is studied and the choose range of basic physical mechanics index was given , which can provide basic data for the project of dealing with the saline soil design.Due to local situation of the saline soil soft ground of Jia An senior highway, the DJM pile method is adopted. Through a series of field tests, the paper puts forward characteristics of ground subsidence and the change regulation of soil pressure and stress ratio. Also, the paper gives the technical parameter for design of DJM pile by meanes of analysis of length, replacement ratio, mixing ratio and jetting quantity. The results of the field tests indicates the DJM pile method dealing with the saline soil soft ground is a economic and valid method , which can spread and apply to deal with soft ground of similar area. The paper analyses the corrosion mechanism of saline soil and puts forward corrosion protection design and measure of the saline soil soft ground.