在富水环境下隧道与地下工程建设中，因地下水渗透引起的围岩失稳导致施工安全事故频发的问题日益突出，建立考虑渗透水压力作用的岩石单轴压缩损伤本构模型对指导现场施工具有重要意义。为描述岩石在单轴压缩破坏过程中的应力−应变关系，在原有的岩石本构模型基础上，引入孔隙岩石变形模型、孔隙纵横比、自洽模型等概念和水化学损伤、Weibull统计损伤等理论，同时考虑渗透压力对岩石弹性模量的影响，确定岩石不同阶段的损伤模型，阐述岩石闭合应力和损伤阈值的确定方法，进而建立适用于不同渗透压力作用下的岩石单轴压缩全过程的本构方程。最后，将构建的本构模型得出的理论曲线与灰岩单轴压缩试验所得实际曲线和文献获得的理论曲线进行对比，该模型很好地体现了岩石压缩全过程的应力−应变曲线，充分证明了此模型的合理性与适用性。

The construction of tunnels and underground projects in a water abundance environment is subjected to increasingly frequent construction accidents arising from the surrounding rock instability caused by groundwater infiltration. Therefore, establishing a damage constitutive model of rocks under uniaxial compression while considering seepage pressure is of great significance for guiding field construction. To characterize the stress-strain relationships in the process of uniaxial compression damage of rocks, this study introduced concepts such as the deformation model of porous rocks, pore aspect ratio, and self-consistent model and theories such as hydrochemical damage and Weibull distribution-based statistical damage into the original constitutive models of rocks while considering the influence of seepage pressure on the modulus of elasticity of rocks. Accordingly, it determined the damage constitutive models of rocks in different stages, elaborated the methods for determining the crack closure stress and damage threshold of rocks, and then established the constitutive equation applicable to the whole uniaxial compression process of rocks under different seepage pressures. As shown by the comparison between the theoretical curves derived from the constitutive model constructed in this study, the actual curves obtained from the uniaxial compression tests of tuffs, and the theoretical curves from relevant literature, the constitutive model constructed in this study represented accurate stress-strain curves of the whole compression process of rocks and, thus, is rational and highly applicable.