Mechanical properties and reasonable proportions of granite similar materials with varying degrees of weathering
摘要
To obtain granite similar materials with similar physical and mechanical properties while considering different degrees of weathering, we implemented a four-factor, five-level orthogonal experimental design method. The mechanical properties and failure mechanisms of similar materials derived from various weathered granite types were elucidated. The parameters of density, cohesion, angle of internal friction, compressive strength, and elastic modulus of rock similar materials were employed as control indices to assess the sensitivity of each factor to the mechanical properties. Through the application of multiple linear regression analysis, equations that describe the relationships between the physical and mechanical parameters of rock similar materials and various influencing factors were derived. Additionally, a method for calculating the proportions of rock similar materials was proposed. The study findings show that the density increases with increasing miron+barite/maggregate and miron/miron+barite ratios. The cohesion and compressive strength increase with increasing gypsum content, and the internal friction angle and elasticity modulus decrease with increasing glycerol content. Furthermore, the discrepancy between the target physical and mechanical parameters and the actual physical and mechanical parameters of the rock similar material is maintained at less than 7%. The results of the slope shaking table model test further validate the reliability of the proportioning calculation method. The findings of this study offer valuable insights and directions for the preparation of granite similar materials with varying degrees of weathering.