Evaluation of Initial Storage Capacity for Containment Area Considering Grain Sorting of Dredged Slurries

The grain sorting of dredged slurries with high water contents is easy to lead to inhomogeneous distribution of soil properties, which has a great effect on accurate assessment of the initial storage capacity for containment area. Based on the field investigation of N1 containment area in the Eastern Route of South-to-North Water Transfer Project, a method of initial storage capacity design for containment areas is proposed considering the grain sorting. The method draws on the experience of the engineer manual: confined disposal of dredged material (EM 1110-2-5027). The method of initial storage capacity design of national standard, i.e. design code for dredged and reclamation works (JTS 181-5-2012) was discussed. The results show that the precision of the method is 15% higher than national standard when initial water content of dredged slurry is more than 1 000%. When initial water content is high, grain sorting is significant, and the precision is higher than national standard. The method has good applicability and promotional value.