红砂岩真三轴压力试验与岩石强度极限统计

为探讨岩石的强度理论和中间主应力效应,进行了红砂岩真三轴压力试验。获得了不同应力状态下的岩石强度极限值和岩石的三向全应力应变曲线。根据本文和收集到的真三轴压力试验资料,探讨了岩石的中间主应力效应问题。统计分析表明:中间主应力一般可使最大主应力的强度极限增大30%。

True Triaxial Pressure Experiment for Red Sand Rock and Limit Statistics of Rock Strength

The true triaxial pressure experiment for red sand rock is conducted for the purpose of investigation into the strength theory of rock and the effect of intermediate main stress. The rock strength limit value under different stress states and the strain curve of 3-dimensional full stress are obtained. The problem of intermediate main stress of rock is investigated in light of the obtained experimental data of the true triaxial pressure. The statistical analysis shows that the intermediate main stress can generally make the maximum main stress increase 30%.