裂隙岩体高压渗透特性研究  

HIGH PRESSURE PERMEABILITY PROPERTIES OF FRACTURED ROCK MASSES

作　　者：倪绍虎[1,2] 何世海[1] 汪小刚[2] 吕慷[1] 卞康[3] 

机构地区：[1]中国水电工程顾问集团华东勘测设计研究院,浙江杭州310014 [2]中国水利水电科学研究院,北京100038 [3]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

出　　处：《岩石力学与工程学报》2013年第S2期3028-3035,共8页Chinese Journal of Rock Mechanics and Engineering

基　　金：浙江省自然科学基金项目(LY13E090003);国家自然科学基金资助项目(511109221)

摘　　要：随着越来越多高水头电站、深部地下工程的建设,工程中面临更多渗透失稳风险,必须通过现场试验系统研究裂隙岩体的高压渗透特性和渗透稳定性。通过现场揭示和水–岩相互作用关系,探讨裂隙岩体的高压渗透破坏机制和破坏模式。基于多个高水头电站中的高压压水试验和高压渗透试验成果,研究高水头压力作用下裂隙岩体的水力劈裂、渗透变形、抗冲蚀性能、渗透稳定耐久性等特性。研究成果表明,高压条件下裂隙岩体的渗透特性会发生显著改变,变化规律和特征与所作用的水压力、应力赋存环境和物质填充情况紧密相关。With rapid construction of hydropower stations and deep underground projects under high water pressure,there are more and more seepage failure risks in these projects. As a result,the in-situ high pressure permeability must be tested and the high pressure permeability properties and seepage stability of rock masses must be systematically and thoroughly studied. In this work,according to the revealed phenomenon in field and the water-rock interactions,the seepage failure mechanisms and failure modes of fractured rock masses under high water pressure are discussed. In addition,based on high pressure packer tests or high pressure permeability tests of several hydropower sataions under high water head,the permeability properties such as hydraulic fracturing, seepage deformation,erosion resistance and long-term seepage stability are studied. The results indicate that:(1) The permeability properties of fractured rock masses can be remarkably changed by high water pressure. (2) The changes of permeability properties are quite correlative with water pressure,supporting environment of stress and fracture fillings.

关 键 词：岩石力学 裂隙岩体 高压渗透试验 高压压水试验 渗透特性 

分 类 号：TU452[建筑科学—岩土工程]