Comparative research on reinforcement of thick soft clay ground based on centrifugal model tests

The settlement control technology of constructing embankments on thick soft clay foundations is a worldwide difficult problem,and the selection of reasonable treating measures of the ground is very critical.In view of the characteristics of the thick soft clay ground of Fu-Xia railway project,taking the geo-centrifugal model tests as the research method,the characteristics of three kinds of reinforcement were used and analyzed to reduce the settlement deformation: sand wick DJM piles,and combination of the DJM piles and the sand wick.It was indicated that: ① using the sand wick the stability problem of ground could be basically solved,but it was difficult to control the settlement after construction;② using the DJM piles the stability problem of ground could be better solved,but the deformation was influenced evidently by the underlying soft clay layer;③ using the combination of the DJM piles and the sand wick the inherent individual flaw of the DJM piles and the sand wick could be overcome,so it was a kind of relatively ideal measure in ground treatment.