Abstract
The direct shear tests of the entire annular waste tires, half annular waste tires, triaxial geogrid, biaxial geogrid and geocell reinforced soils have been carried out respectively, through large direct shear apparatus, and the reinforcement mechanism and the shear performance have been analyzed. The test results show that reinforcement effect of reinforcement materials is obvious, and compared to unreinforced soils, the shear strength of reinforced soils increased greatly. The cohesion force of reinforced soils increased significantly, but the friction angle of reinforced soils has a small change, which illustrates that the shear strength of reinforced soils mainly come from the increase of cohesion force. The shear strength of reinforced soils is closely related to the formation of reinforcement materials. The shear strength of three-dimensional structure reinforced soils, such as entire annular tire, half annular tire and geocell reinforced soils, is evidently larger than that of two-dimensional structure reinforced soils, such as triaxial geogrid and biaxial geogrid reinforced soils.
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