粘土岩细-宏观水-力耦合机理及围岩稳定性分析

项目名称： 粘土岩细-宏观水-力耦合机理及围岩稳定性分析

项目编号： No.11272114

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 邵建富

作者单位： 河海大学

项目金额： 86万元

中文摘要： 本项目以我国粘土岩地下工程围岩稳定性为研究核心。采用一系列室内试验和测试，揭示粘土岩中主要矿物成份对宏观力学行为的影响机理、水相和主要矿物成份相互作用机理以及主要矿物成份含量变化对其水-力耦合行为的影响机理。以试验结果和分析为基础，采用非线性均匀化方法，建立描述天然粘土岩短长期力学行为的多尺度模型；借助渗透系数试验，建立粘土岩水-力耦合模型；基于不同湿度下的物性、三轴压缩和蠕变及渗透系数试验，考虑毛细压力和表面张力的作用，建立非饱和粘土岩短长期力学模型，进而建立非饱和粘土岩水-力耦合模型；提出粘土岩地下工程围岩损伤破坏与稳定性数值分析方法，依托我国核废料粘土岩处置库候选场址进行工程应用和验证。本项目的研究成果可为我国粘土岩地下工程的设计和围岩稳定性分析提供理论和技术。

中文关键词： 粘土岩；水-力耦合；多尺度分析；均匀化；数值模拟

英文摘要： The present project focuses on the stability analysis of surrounding claystone in underground engineering structures. The project is composed of both experimental investigation and numerical modeling.A series of laboratory tests will be first performed in order to characterize the influence of the claystone mineral composition on the macroscopic mechanical behavior,the interaction mechanism between pore water and main mineral constituents as well as the influence of evolution in mineral composition on the hydromechanical behavior of claystone. Based on the test results and experimental evidences,using non-linear homogenization methods, a meso-macro model will be proposed to describe the short and long term mechanical behavior of natural claystone. Further, through permeability test, a hydromechanical coupling model will be established. Based on the physical tests, triaxial compression and creep tests and permeability tests under different relative humilities, considering the role of capillary pressure and surface tension, the short and long term mechanical modeling of unsaturated claystone will be proposed. After the formulation and validation of the hydro-mechanical model for non-saturated claystone, we propose to develop efficient numerical method for coupled problems in order to describe damage and failure pr

英文关键词： Claystone；Hydro-mechanical coupling；Multiscale analysis；Homogenization；Numerical modeling