水-力-化耦合作用下填埋场中间粘土覆盖层宏微观演化特性研究

Aimed at the key scientific problems in evolutionary process of the mechanical properties of the middle clay cover layer in landfill under complex environmental conditions, and based on the integration of the advanced microscopic analysis technology and the theories and subjects of Rock and Soil Mechanics, Seepage Mechanics and Environmental Geotechnical Engineering etc, from the microcosmic and multi-field coupling perspective, the dynamic evolutionary process of macroscopic mechanical properties and micro-structural features of the middle clay cover layer in landfill which were under the hydro-mechanical-chemical coupling effect were studied by a series of physical and chemical simulation experiments and the microstructure analysis test of clay, and the microscopic mechanism of the evolution of macroscopic mechanical properties of the middle clay cover layer was revealed. The dynamic evolutionary process of the microstructure features of middle clay cover layer were quantitatively characterized, then proposed the mathematical equation that described the relations between the mechanical parameters and microcosmic composition and structure. Finally, a macro and micro unified model of dynamic evolutionary process of macroscopic mechanical properties and micro-structural features of the middle clay cover layer in landfill under the coupled hydro-mechanical-chemical action was established. Research results can effectively promote the development of subject of Environment Geotechnical Engineering, which is of great academic significance and practical value for promoting the security operations of landfills in China.

针对复杂环境条件下垃圾填埋场中间粘土覆盖层力学特性演变过程中的关键科学问题，基于先进的微观分析技术与岩土力学、渗流力学和环境岩土工程学等理论与学科的交叉融合，从微观和多场耦合角度出发，通过一系列室内物理化学模拟试验和粘土微观组构分析试验，研究水-力-化耦合作用下垃圾填埋场中间粘土覆盖层宏观力学特性和微观组构特征的动态演化规律，揭示中间粘土覆盖层宏观力学特性演化的微观机理，对微观组构特征动态演化过程进行定量表征，提出描述宏观渗透和变形参数与微观组构参数间关系的数学方程；构建水-力-化耦合作用下垃圾填埋场中间粘土覆盖层宏观力学特性和微观组构特征动态演化的宏微观统一分析模型。研究成果可有效促进环境岩土工程学科的发展，对于提高我国垃圾填埋场的安全运营水平具有重要的理论意义和工程价值。

针对复杂环境条件下垃圾填埋场中间粘土覆盖层力学特性演变过程中的关键科学问题，基于先进的微观分析技术与岩土力学、渗流力学和环境岩土工程学等理论与学科的交叉融合，从微观和多场耦合角度出发，开展了一系列室内物理化学模拟试验和粘土微观组构分析试验，研究了水-力-化耦合作用下垃圾填埋场中间粘土覆盖层宏观力学特性和微观组构特征的动态演化规律，揭示了中间粘土覆盖层宏观力学特性演化的微观机理，对微观组构特征动态演化过程进行了定量表征，提出了描述宏观渗透和变形参数与微观组构参数间关系的数学方程；构建了水-力-化耦合作用下垃圾填埋场中间粘土覆盖层宏观力学特性和微观组构特征动态演化的宏微观统一分析模型，对多场耦合作用下垃圾填埋场中间粘土覆盖层渗透特性、力学强度特性和安全稳定性进行了模拟分析。研究成果可有效促进环境岩土工程学科的发展，对于提高我国垃圾填埋场的安全运营水平具有重要的理论意义和工程价值。发表SCI收录学术论文9篇；出版专著1部；授权发明专利3项；获得2016湖北省科技进步一等奖1项；培养博士1名，硕士2 名。