ABSTRACT
A series of large-scale direct shear tests and cyclic shear tests were conducted on the staggered stacking soilbags. The influences of the number of cyclic shears, vertical stress, and amplitude of shear displacement during the cyclic shearing process on the dynamic deformation characteristics and shear strength of the staggered stacked geotechnical bags were explored. The results show that the shear failure of the interface between the soilbags before and after the cyclic shear basically conforms to the Mohr-Coulomb failure criterion. Under low vertical stress condition, the dynamic parameters of the interface between the soilbags change slightly as the number of cycles increases. As the vertical stress increases, the dynamic shear modulus of the interface between the soilbags increases, while the damping ratio remains unchanged. As the amplitude of horizontal shear displacement increases, the damping ratio of the interface between soilbags gradually goes up, and the dynamic shear modulus decreases. After the cyclic shear test, the increase in the shear strength of the interface between the soilbags increases with the rise of the vertical stress.
