Abstract：The dredged soil was solidified with soda residue，ground granulated blast furnace slag and carbide slag. Dynamic triaxial tests were conducted under different solidifier contents，water contents，confining pressures and consolidation ratios. The dynamic stress-strain relationship，dynamic elastic modulus，damping ratio and empirical formula were studied. The results show that the increase in solidifier content and the decrease in water content contribute to increase the dynamic elastic modulus and decrease the damping ratio，but when soda residue content is higher than 40%，the dynamic elastic modulus decreases and the damping ratio increases. The increase in confining pressure and consolidation ratio help to increase the dynamic elastic modulus and decrease the damping ratio. From the viewpoint of dynamic properties and economy，the appropriate contents of soda residue，ground granulated blast furnace slag and carbide slag are 35%，10% and 4%，respectively. The dynamic stress-strain relationship of solidified soil is in accordance with the Hardin-Drnevich model. The Darendeli model can be used to describe the dynamic elastic modulus and stain relationship for solidified soil. On the basis of Hardin?s maximum dynamic shear modulus formula，the modified empirical formula for solidified soil is proposed. The maximum dynamic elastic modulus of the solidified dredged soil is 86.96–157.23 MPa，which is close to or exceeds the lower limit of general solidified soil. The solidified soil can be used as general engineering filler and exhibits good dynamic deformation properties.
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2023, Vol. 42 
