Abstract: The highway embankment settlement prediction of the Deep Cement Mixed (DCM) column improved ground can not only reflect the embankment settlement accumulations but also be used to evaluate the effectiveness of the soil improvement as well as the stability of the improved embankment. As a result, the settlement prediction has received an increase attention. This paper presents the case study of the settlement prediction work for the DCM improved highway embankment. A modified gray prediction by using nonequally time interval GM(1,1) model was used in the analysis and the results are verified by the observed data. It is concluded that this modified model can provide a satisfactory settlement prediction for the DCM improved highway embankment.

Key words: Composite Ground by Deep Cement Mixed Columns, Gray Model, NonEqually Time Interval, Settlement Prediction