高压隧洞内水外渗三维有限元分析与渗透稳定性研究  

3D Finite Element Analysis of Seepage from A High Pressure Tunnel and Study on Its Permeation Stability

作　　者：张巍[1,2] 陈云长[3] 黄立财[3] 刘林军[3] 

机构地区：[1]中山大学工学院,广东中山510275 [2]中山大学岩土工程与信息技术研究中心,广东中山510275 [3]广东省水利电力勘测设计研究院,广东广州510635

出　　处：《水利与建筑工程学报》2015年第5期212-217,共6页Journal of Water Resources and Architectural Engineering

摘　　要：阳江抽水蓄能电站高压岔管拟采用钢筋混凝土衬砌,其静水压力799 m为国内之最。为保证在高水头作用下围岩的渗透稳定,采用三维有限元方法,针对阳江抽水蓄能电站高压水道防渗排水系统进行渗流及渗透稳定研究。研究结果表明,高压隧洞渗漏量在合理范围,高压固结灌浆、防渗帷幕和排水系统等防渗排水措施设计合理,效果显著。渗透稳定性方面,断层f 708与排水廊道相交处渗透坡降较大,发生渗透破坏的可能性较大,需重点处理。通过高压隧洞内水外渗三维有限元分析与渗透稳定性的研究,使得处理措施更具针对性。For the high pressure bifurcated pipes of Yangjiang pumped storage power station ,reinforced concrete lining scheme is to be adopted .The static water pressure is 799 m ,which is the highest in China .In order to maintain the sta-bility of the surrounding rock under high water pressure ,3D finite element method was adopted to investigate seepage and infiltration stability of the high pressure drainage pipe system of this power station .Firstly the seepage prevention and drainage system layout scheme of this power station was introduced ,followed by the introduction of the seepage 3D finite element calculation theory ,based on which the study was carried out .The study results indicate that the seepage dis-charge is within a rational range ,and the layout scheme of seepage prevention and drainage system of the high pressure tunnels is suitable and obviously effective .For the aspect of seepage and infiltration stability ,the seepage gradient value in the intersection region of f708 and the drainage gallery is relatively big .The possibility of hydraulic failure in this re-gion is imminent ,and it is necessary to take prevention measures .With the help of the 3D finite element analysis and the study on seepage stability of the high pressure tunnels of this power station ,the handling actions will be more targeted .

关 键 词：高压隧洞 内水外渗 渗流 渗透稳定 

分 类 号：TU452[建筑科学—岩土工程]