Compared with pure sand

the rubber particles of waste tires and sand mixtures have the characteristics of light density

strong elastic deformation

high energy consumption and low shear modulus.They can be widely used in engineering fields such as slope

retaining wall

roadbed backfilling

abutment traffic jump mitigation

building isolation and vibration reduction.In this paper

the effects of rubber content

particle size and confining pressure on the dynamic shear modulus and equivalent damping ratio of mixed soil are studied by resonance column test.The results show that in the small strain range

the dynamic shear modulus of rubber-sand mixed soil decreases

the damping ratio increases and the dynamic shear modulus ratio declines slowly with the increase of rubber content when the confining pressure and particle size are the same;Under the same content and size conditions

the dynamic shear modulus increases

the dynamic shear modulus reduces slowly and the damping ratio decreases with the rise of confining pressure.Under large strain amplitude

dynamic shear modulus ratio decline speedily with the increase of the confining pressure when the rubber content is low.When the rubber content is high

the influence of the confining pressure is the same as in the small strain range.When the confining pressure and content are the same

the variation curves of modulus and damping ratio with rubber particle size are very close to each other.That is

the dynamic shear modulus and damping ratio of rubber-sand mixed soil are susceptive to rubber content and consolidation confining pressure instead of particle size.