软岩隧道围岩大变形灾变全过程的多尺度界面效应计算原理与方法

项目名称： 软岩隧道围岩大变形灾变全过程的多尺度界面效应计算原理与方法

项目编号： No.41472257

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 地质学

项目作者： 刘镇

作者单位： 中山大学

项目金额： 98万元

中文摘要： 软岩隧道研究是国际上工程地质学与环境地质学的前沿课题之一，其围岩大变形灾变全过程的计算原理与方法是其风险控制的关键之所在。以往研究注重宏观力学计算方法，对灾变不同尺度内在联系研究不足，缺乏同一框架下多尺度计算原理与方法，成为软岩隧道灾害控制的瓶颈。为此，拟以红层软岩隧道为对象，从界面效应与裂隙-孔隙渗流耦合这一本质内在关联出发，运用重整化群、颗粒离散元等原理，研究基于界面效应的软岩隧道围岩大变形灾变全过程的多尺度计算原理与方法。重点包括：（1）软岩隧道围岩大变形灾变试验与多尺度界面效应表征；（2）软岩隧道围岩大变形灾变全过程的多尺度界面效应演化机制；（3）软岩隧道围岩大变形灾变全过程的多尺度界面效应计算原理与方法。通过研究，揭示软岩隧道围岩大变形灾变全过程的多尺度演化机制，建立其计算原理与方法，为软岩隧道围岩灾变研究提供全新方法，为其工程安全防护提供重要依据，具有重要理论意义和实际价值。

中文关键词： 软岩隧道围岩；大变形灾变全过程；界面效应；多尺度；计算原理与方法

英文摘要： The study of soft rock tunnel is one of the topics at the forefront of the engineering geology and environmental geology in the world. The computing theory for the whole process of large deformation catastrophe of the soft rock tunnel surrounding rock is the key to its risk control. Previous research focuses on the macro-mechanical calculation method, is insufficient in the study of the internal relations of different scale catastrophe, and lacks the multi-scale unified computing theory and method. This has become the bottleneck of soft rock tunnel risk control. To this end, the study will target at the soft rock tunnel, and start from the internal relations of the interface effect and fissures - seepage coupling, and use Renormalization-Group Theory and particle discrete element method to research the multi-scale calculation principles and methods of the whole process of large deformation catastrophe for soft rock tunnel surrounding rock, and build a new type of unified computing theory and method. The highlights include: (1) the experiments and the characterization of multi-scale interface effect of large deformation catastrophe for soft rock tunnel surrounding rock, (2) the evolution mechanism of multi-scale interface effect in the whole process of large deformation catastrophe for soft rock tunnel surrounding rock, (3) the calculation principles and methods of multi-scale interface effect in the whole process of large deformation catastrophe for soft rock tunnel surrounding rock. Through this study, the multi-scale evolution mechanism of the whole process of large deformation catastrophe of the soft rock tunnel surrounding rock is revealed, and the calculation principles and methods for multi-scale interface effect are built. This provides a brand new method for the study on the catastrophe of the soft rock tunnel surrounding rock, also provides an important basis for the engineering safety protection. It is with important theoretical significance and practical value.

英文关键词： soft rock tunnel surrounding rock;whole process of large deformation catastrophe;interface effect;multi-scale;calculation principles and methods