温度作用下泥岩水力耦合特性研究

The rising temperature of rockmass, not only affects the physical properties of the material itself and water, but also plays an important role on the stress and seepage fields of the engineering. Here we focus on mudstone, a geomaterial commonly encountered in many geotechnical engineering. THM nonlinear damage mechanism,permeability evolution law considering thermo-effect, and the irreversible deformation accumulation characteristics in the process of loading and unloading of mudstone were studied through both the experimental and theoretical study. On the one hand, experimental studies, such as THM triaxial tests, permeability tests under different thermo-conditions and cyclic loading tests were carried out. On the other hand, theoretical studies, such as THM nonlinear damage constitutive model,permeability evolution model considering thermo-effect and damage evolution law were presented. Based on the pervious study, a numerical method for the established nonlinear mechanical model was implemented, and then, the rockmass' mechanical response during heating process for PRACLAY gallery (Belgium) was analyzed through large-scale numerical simulation. The results provide a theoretical guidance for solving key technical problems of many major projects, such as the geological disposal of nuclear waste, resource extraction, oil development.

岩土介质温度的升高, 不仅影响岩土体、水体的物理性质, 而且对整个岩土体的应力场和渗流场有重要影响。本课题以岩土工程中常见的泥岩为研究对象，拟采用室内实验、理论分析及数值模拟相结合的方法，通过开展泥岩THM耦合三轴试验、不同温度条件下的渗透性试验及循环加卸载三轴试验等，揭示温度作用下泥岩的THM耦合非线性损伤机理、渗透性演化规律及加卸载过程中不可逆变形的累积特征；提出所建非线性力学模型的数值仿真方法，并通过大型数值仿真计算，分析比利时HADES地下实验室泥岩巷道加热试验过程中的力学响应特征。研究成果对解决核废料地下储库、水资源开发及石油开发等重大岩石工程的关键技术问题具有重要的指导意义。

岩土介质温度的升高, 不仅影响岩土体、水体的物理性质, 而且对整个岩土体的应力场和渗流场有重要影响。本课题以岩土工程中常见的泥岩为研究对象，采用室内实验、理论分析及数值模拟相结合的方法，通过开展泥岩 THM 耦合三轴试验、不同温度条件下的渗透性试验及循环加卸载三轴试验等，揭示温度作用下泥岩的 THM 耦合非线性损伤机理、渗透性演化规律及加卸载过程中不可逆变形的累积特征；提出所建非线性力学模型的数值仿真方法，并通过大型数值仿真计算，分析比利时 HADES 地下实验室泥岩巷道加热试验过程中的力学响应特征。研究成果对解决核废料地下储库、水资源开发及石油开发等重大岩石工程的关键技术问题具有重要的指导意义。