东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

锦屏二级水电站深埋引水隧洞稳定性研究

期刊名称：《岩土工程学报》，2008，28（8）
时间：0
分类：TV139.1[水利工程—水力学及河流动力学] O35[理学—流体力学;理学—力学]
作者机构：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071, [2]湖北省发展与改革委员会,湖北武汉430071, [3]铁道第四勘察设计院,湖北武汉430063
相关基金：国家自然科学基金雅砻江水电开发联合基金项目（50539090,50579087）;国家自然科学基金西部重大研究计划（90510019）
相关项目：深部岩体与结构面的变形及强度特性及其参数评估方法

关键词：多孔介质, 耦合, 引水隧洞, 本构方程, 损伤, porous media, coupling, diversion tunnel, constitutive model, damage

中文摘要：

裂隙岩体的渗流应力祸合机理是岩体水力学的研究重点。基于多孔介质有效应力原理，以体积应变为切入点，建立了考虑岩体变形特性的渗透系数动态演化方程和弹塑性耦合损伤本构模型，并将所建立的本构模型编制程序导入到大型商用有限元程序ABAQUS，研究锦屏二级水电站深埋引水隧洞运营期围岩和衬砌的受力和变形特征。研究成果表明：考虑渗透系数动态演化的力学模型可以更好地反映隧洞运营期衬砌的外水压力特征，比不考虑渗透系数动态演化的计算结果更加合理，由于锦屏4个引水隧洞的间距较大，隧洞开挖和运行放水所产生的裂隙损伤演化区没有形成贯通区域。

英文摘要：

Hydromechanical coupling of jointed rock mass was the key point for problems of hydraulics of rock mass. In consideration of the deformation of rock mass, the evolution equation of rock permeability coefficient related with volumetric strain and the saturated elasto-plastic damage coupling model were proposed based on the effective stress law of porous media. By means of the nonlinear FEM software ABAQUS, the model was implemented to study the stibility of rock mass and the supporting of the diversion tunnel for Jinping Hydropower Station project during its operation period. It was shown that the hydromechanical coupled model considering evolution of rock permeability coefficient was more realistic to the project, for example, the external water pressures of lining were agreeable to the field measurement. So it was more reasonable than that without considering evolution of permeability coefficient. In the meanwhile, the damage evolution zones did not run through all the areas due to large space between them.