Abstract：Taking the results of the test on the treated soft ground of the Guangzhou—Zhuhai Quasi-High-Speed Railway for example，the settlement of the border piles beside the embankment toe，transverse and lengthways differential settlement of the surface，and the settlement caused by horizontal displacement are discussed. The method to determine the thickness of the compressed layer in calculating the settlement of soft ground is proposed. In the computation of settlement and stability of embankment，the additional load caused by settlement of embankment on the large-deformation soft soil ground which is deep and thick should be considered. For the railway embankment，the differential post-construction settlement induced by different ground treatment method need not to be considered. The results show that in the calculation of foundation settlement，the method of controlling strains and the method of controlling stresses should be used respectively，according to the specific positions of the foundation，to determine the thickness of the compressed layer.
