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时间:2019-03-03
《高压引水隧洞陡倾角断层岩体高压压水试验研究》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、第26卷第11期岩石力学与工程学报Vol.26No.112007年11月ChineseJournalofRockMechanicsandEngineeringNov.,2007高压引水隧洞陡倾角断层岩体高压压水试验研究1,2,32222蒋中明,傅胜,李尚高,胡大可,冯树荣(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;3.长沙理工大学岩土工程研究所,湖南长沙410076)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
2、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。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;耦合效应中图分类号:TU45文献标识码:A文章编号:1000–6915(2007)11–2318–06HIGHPRESSUREPERMEABILITYTESTONHYDRAULICTUNNE
3、LWITHSTEEPOBLIQUITYFAULTSUNDERHIGHPRESSURE1,2,32222JIANGZhongming,FUSheng,LIShanggao,HUDake,FENGShurong(1.Mid-southDesignandResearchInstitute,ChinaHydropowerEngineeringConsultingGroupCo.,Changsha,Hunan410014,China;2.StateKeyLaboratoryofWaterResourcesandHydropowerEngineeringScience,WuhanUniversit
4、y,Wuhan,Hubei430072,China;3.InstituteofGeotechnicalEngineering,ChangshaUniversityofScienceandTechnology,Changsha,Hunan410076,China)Abstract:Thehighpressurepermeabilitytest(HPPT)ofin-situtestisaneffectivemethodtoinvestigatethedeformationandpermeabilityofrockmassduetohighpressure.Duringtheprocesso
5、ffull-scaleexperimentofapumpedstoragepowerstation,anapproachforHPPTwithsteepobliquityfaultsandtheexperimentsarestudiedtoobservethevariationofporewaterpressureanddeformationoftherockmassduetohighwaterpressure.Awave-liketheoryofhydraulicfracturefordescriptionoffracturedareaspreadingisalsodeveloped
6、tounderstandtheexperimentalresults.Thefailurecharacteristicsduetoseepageunderhighpressurearepresentedonthebasisofcombiningexperimentalresultsandknowledgeofhydraulicfracture;also,differentformsofseepagefailurebetweenrockmassandsoilarepresented.Toinvestigatethecharacteristicsofseepagedeformationdu
7、etohighporewaterpressureinrockmass,porepressureanddeformationoftherockmassaremeasuredsimultaneouslyduringtheexperiment.Thedeformationlawduetothevariationofporewaterpressureinrockmassindicatesthatthecoupledhydro-mechanicaleff
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