Understanding the sedimentation behavior of dredged slurry under shear is essential for managing disposal ponds and land reclamation. This study developed a rotating shear settling device to systematically investigate the structural evolution and sedimentation response of dredged slurry (Tianjin mud) under varying shear intensities (0–4.89 s-1) and initial water contents (157%–377%). Results revealed that, across tests with increasing applied shear intensities, the slurry exhibited four distinct