The relationship between UCS and εf of solidified sediments is plotted in Fig. 7. Ye et al. (2006) found that the εf changes with UCS as power functions for cement-solidified soils. Zhu et al. (2005) observed that the εf decreases with UCS as exponential function for cementsolidified sediments. These functions permit to predict the approximate value of UCS or εf of solidified sediments. However, for the studied sediments from Dunkirk harbor, it seems difficult to find an adequate function to fit the relationship between UCS and εf. But it still exists an approximation relationship between UCS and εf: UCS=(20–130) εf. FromFig. 7, it is observed that the εf of sediments solidified with cement, lime and fly ash ranges mainly between 1% and 2%. It has a decreasing trend with an increase in UCS, and this conclusion agrees well with the results of other authors (Tang et al., 2000; Zhu et al., 2005). In engineering, the deformation of filling subgrade greater than 1.0% should be controlled and monitored after construction and even second treatment should be performed if necessary in some complex projects.