Both surface and underground rocks in nature often undergo repeated drying and wetting. The dry-wet cycle is a weathering effect that includes physical and chemical processes, which has varying degrees of degradation effects on the physical and mechanical properties of rocks. This paper analyzes and discusses this kind of rock degradation based on the existing literature data. First, the deterioration degree of various physical and mechanical properties (including density, P-wave velocity, porosity, static and dynamic compressive/tensile strength, and fracture toughness) is summarized as the number of dry-wet cycles increases. Secondly, the possible degradation mechanism of the dry-wet cycle is explained in terms of clay mineral swelling, solute migration, and microcrack evolution. Then, the damage constitutive model of the rock after cyclic dry-wet treatment is introduced. Finally, the issues that need to be studied in the future are put forward.

中文翻译：

---

循环干湿对岩石物理力学性能的破坏

自然界中的地表和地下岩石经常经历反复的干燥和润湿。干湿循环是一种包括物理和化学过程在内的风化作用，对岩石的物理力学性质有不同程度的降解作用。本文在已有文献资料的基础上，对这种岩石退化现象进行了分析和探讨。首先，将各种物理力学性能（包括密度、纵波速度、孔隙率、静态和动态压缩/拉伸强度和断裂韧性）的劣化程度概括为干湿循环次数的增加。其次，从粘土矿物膨胀、溶质迁移和微裂纹演化方面解释了干湿循环可能的降解机制。然后，介绍了循环干湿处理后岩石的损伤本构模型。最后，提出了今后需要研究的问题。