基于多相流及多场耦合的降雨诱发滑坡机理研究

项目名称： 基于多相流及多场耦合的降雨诱发滑坡机理研究

项目编号： No.51279090

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 水利工程

项目作者： 童富果

作者单位： 三峡大学

项目金额： 75万元

中文摘要： 我国是滑坡地质灾害多发的国家，大量的滑坡实例表明，降雨是触发滑坡、泥石流等地质灾害的主要诱因。本项目基于多相（固相、液相、气相）流及多场(应力场、渗流场、温度场)耦合的理论和方法，以三峡库区降雨诱发型滑坡为研究对象，以降雨入渗及滑坡体变形失稳过程为研究主线，通过进行降雨入渗及坡体失稳演化过程的理论、试验和数值模拟研究，揭示三相（土骨架、液态水、气）联合作用下的降雨入渗规律以及考虑三场（应力、渗流、温度）耦合效应的坡体变形失稳规律，进而探讨降雨诱发滑坡的物理力学机理，提出描述坡面径流、坡体渗流及边坡变形失稳过程的多场耦合数学模型及其数值求解方法，为降雨型滑坡的防治提供理论和分析方法支撑，研究成果具有重要的理论意义和广阔的工程应用前景。

中文关键词： 滑坡；降雨入渗；坡面径流；多相流；多场耦合

英文摘要： Landslide hazards frequently occur in many places of China .Many geologic hazards of landslide show rainfall is one of the main factors which induce landslide and debris flow. Based on multiphase flow and coupled thermo-hydro-mechanical theories and methods, this research focuses on the processes of rainfall infiltration and deformation of landslides in Three Gorges region. This proposal aims to get some regulars of rainfall infiltration and deformation of landslides when coupled thermo-hydro-mechanical processes and multiphase flow are simultaneously considered, and further reveal the mechanism of landslides induced by rainfall through experiments and numerical simulations. A new coupled thermo-hydro-mechanical model and its numerical solution method will be developed for simulating the process of rainfall infiltration, runoff and deformation of landslides. The project is expected to be of assistance in theory and methodology of landslide prevention. The results of the research will have an important theoretical impact on multiphase flow and thermo-hydro-mechanical processes, and will consequently play an important role in the engineering of landslide prevention.

英文关键词： landslide；rainfall infiltration；runoff；multiphase flow；coupled thermo-hydro-mechanical processes