不同加载路径饱和岩石力学特征的试验研究

不同加载路径对岩石强度特征、变形特征和破坏特征存在影响。据此，探讨饱和岩石在排水、非排水、比例加载、侧向卸载、在不同偏应力状态下注水和非排水（但在不同偏应力状态下水压力卸载）等加载情况下以及在常规三轴试验和拥有循环加载的三轴试验等试验方式下，岩体的强度特征、各向异性变形特征和破坏特征。试验结果表明：循环加载、饱和岩石在不同偏应力状态下注水、非排水但在不同应力状态下水压力卸载、比例加载和侧向卸载等具有降低岩石强度、增加岩体变形以及水压力对岩石具有劈裂破坏作用等特征，这些力学特征对岩土工程具有现实意义。

EXPERIMENTAL STUDY ON MECHANICAL BEHAVIORS OF SATURATED ROCK UNDER DIFFERENT LOADING PATHS

The different loading paths have influences on strength characteristics, deformation behaviors, and the types of rock failure. The characteristics of strength, deformation and failure of saturated rock are investigated by the conventional triaxial test and that under cyclic loading with different deviatoric stress states, for instances, current triaxial test, current triaxial test of undrainage, proportional loading test, lateral unloading test, injection test under different deviatoric stress states, unloading test of water pressure under different deviatoric stress states, and current loading test with cyclic loading, etc.. The experimental results show that the fundamental properties, i.e., the strength decrease, deformation increase, and splitting effect of water pressure and etc., come from cyclic loading, injecting under different deviatoric stress states, unloading of water pressure with undrainage under different deviatoric stress states, proportional loading and the lateral unloading and the like. These fundamental behaviors are very important for geotechnical engineering.