高压引水隧洞陡倾角断层岩体高压压水试验研究  

HIGH PRESSURE PERMEABILITY TEST ON HYDRAULIC TUNNEL WITH STEEP OBLIQUITY FAULTS UNDER HIGH PRESSURE

作　　者：蒋中明[1] 傅胜[2] 李尚高[2] 胡大可[2] 冯树荣[2] 

机构地区：[1]中国水电顾问集团中南勘测设计研究院,湖南长沙410014 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《岩石力学与工程学报》2007年第11期2318-2323,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金委员会;二滩水电开发有限责任公司雅砻江水电开发联合研究基金项目(50539110)

摘　　要：结合一抽水蓄能电站高压岔管区高压压水试验,详细介绍了具有陡倾角断层岩体的高压压水试验方法及试验成果。探讨了岩体高压下水力劈裂区扩展的波动理论和渗透破坏特性,明确了岩体与土体渗透破坏形式差异。试验首次对岩体内的渗透压力和变形进行了同步测量,以了解高压条件下岩体的渗透变形特性。在高孔隙压力作用下,岩体的变形发展试验成果表明,岩体应力和稳定性分析过程中孔隙压力的作用不可忽视,因此采用耦合理论对高孔隙压力环境下的工程岩体进行分析有助于降低围岩失效风险。The high pressure permeability test（HPPT） of in-situ test is an effective method to investigate the deformation and permeability of rock mass due to high pressure. During the process of full-scale experiment of a pumped storage power station, an approach for HPPT with steep obliquity faults and the experiments are studied to observe the variation of pore water pressure and deformation of the rock mass due to high water pressure. A wave-like theory of hydraulic fracture for description of fractured area spreading is also developed to understand the experimental results. The failure characteristics due to seepage under high pressure are presented on the basis of combining experimental results and knowledge of hydraulic fracture; also, different forms of seepage failure between rock mass and soil are presented. To investigate the characteristics of seepage deformation due to high pore water pressure in rock mass, pore pressure and deformation of the rock mass are measured simultaneously during the experiment. The deformation law due to the variation of pore water pressure in rock mass indicates that the coupled hydro-mechanical effect cannot be ignored during the analysis of the stress state and stability of surrounding rock mass. It is suggested that the theory of coupling analysis would be helpful to reduce the failure risk of surrounding rock mass located in high pore water pressure environments.

关 键 词：岩石力学 陡倾角断层岩体 高压渗透试验 水力劈裂 渗透破坏 高压渗透性 耦合效应 

分 类 号：TU45[建筑科学—岩土工程]