为揭示云南文山地区层状千枚岩由于其层理结构所引发力学的各向异性以及遇水软化特性，制备不同含水条件和层理角度的千枚岩标准试样，并分别进行室内单轴压缩和常规三轴压缩试验。结果表明：层状千枚岩力学性质的各向异性以及遇水软化的性质受制于其原始沉积作用形成的层理结构和组成成分，正是由于层理面间的弱胶结作用使得不同层理面下的千枚岩试样表现出破坏机制上的差异以及力学上的各向异性，这种弱面效应导致随着0°~90°层理角度逐渐增大千枚岩的力学强度呈U形变化，而千枚岩试样的破坏机制也由剪切破坏逐渐演变为压制拉裂破坏。此外，含水条件对千枚岩的力学特性有很大影响，干燥条件下千枚岩更易发生脆性破坏，而饱水后，千枚岩的延性和塑性提高，力学强度降低且脆性破坏特性减弱。

In order to reveal the mechanical anisotropy and water softening characteristics of layered phyllite in Wenshan area of Yunnan Province due to its bedding structure, phyllite standard samples with different water content conditions and bedding angles were prepared, and indoor uniaxial compression and conventional triaxial compression tests were carried out respectively. The results show that the anisotropy of the mechanical properties of layered phyllite and the properties of water softening are subject to the bedding structure and composition formed by its original sedimentation. It is precisely because of the weak cementation between bedding planes that the phyllite samples under different bedding planes show differences in failure mechanisms and mechanical anisotropy. This weak surface effect leads to a U-shaped change in the mechanical strength of phyllite as the bedding angle gradually increases from 0° to 90°, and the failure mechanism of phyllite samples gradually evolves from shear failure to compressive tensile failure. In addition, the water content has a great influence on the mechanical properties of phyllite. Under dry conditions, phyllite is more prone to brittle failure. After water saturation, the ductility and plasticity of phyllite are improved, the mechanical strength is reduced and the brittle failure characteristics are weakened.