Abstract
Hydraulic fill silty sands in Caofeidian port serves as the research object. Through a large volume uniaxial compression test of dredger fill silty sand, the stain-time curves under various levels of normal stress are obtained. The charts show that stain-time curves are all with similarly shaped nonlinear characteristics. The results of tests illustrate that dredger fill silty sands show some creep behavior. In general, the creep process can be divided into three stages: instantaneous deformation, rapid deformation and slow deformation. In addition, normal stress has an evident impact on consolidation-creep behavior of dredger fill silty sands. Initial deformation and final deformation grow larger and larger with an increasing normal stress. In the meanwhile, the time of achieving stable deformation becomes longer as well. Based on the achieved creep charts, a power function is proposed to describe the relationship of deformation-time for the dredger fill silty sands.
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