钻孔高压压水试验的数值模拟

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1、第25卷第5期岩石力学与工程学报Vb1．25No．52006年5月ChineseJournalofRockMechanicsandEngineeringMay，2O06钻孔高压压水试验的数值模拟魏宁，李金都，傅旭东(1，武汉大学土木建筑工稻学院，湖北武汉430072；2．黄河水利委员会勘测规划笈计研究院，河南郑州450003)擅蔓：为l『从理论上进‘步讨论高压水作用下岩体的渗透特性，建立考虑紊流、层流、扩张、劈裂、冲蚀和淤堵现象的应力场与渗流场耦合的连续介质模型和应力场耦合Oda渗透张量模型，并编制相应的有限元计算程序WS。采f【}J该程序对惠州抽水蓄能

2、电站的钻孔压水试验进行数值模拟，得到压力水头P与水流量Q的关系曲线(P．O曲线)与高压压水资料吻合较好。同时。根据数值模拟中的现象和结果进行分析可知，在高压压水试验中，层流、紊流、扩张、劈裂、冲蚀、淤堵现象中的一种或几种现象共同作用决定P．O曲线的类型。关键词：数值模拟；高压压水试验：耦合分析：P．O曲线中田分类号：o242文献标识码：A文章编号：1000—6915(2006)05—1037—06NUMERICALSIMULATIONOFHIGH．PRESSUREINJECTIoNEXPERIMENTWEINing1，LIJindu2，FUXudong(

3、1．SchoolofCivilandArchitecturalEngineering，WuhanUniversity，Wuhan，Hubei430072，China：2．Reconnaissance，Planning，DesignandResearchInstitute，YellowRiverConservancyCommission，Zhengzhou，Henan450003，China)Abstract．Conventiona1injectionexperimentwasconductedtoinvestigatethehydraulicbehavi

4、orofarockmass．Withthedevelopmentofhydraulicengineering，conventionalinjectionexperimentcannotsatisfytheneedforestimatinghydromechanicalcharacterofrockmassorprovidingenoughinformationtoengineeringdesignandseepagecontro1．High—pressureinjectionexperimentshavebeencarriedoutinmanyhydro

5、powerengineeringprojectsrecently．Inordertoanalyzetheseepagecharactersofrockmassinhighpressurei~ecfionexperiment，somebasicpresumptionsandtheoriesconsideringeffectsoflaminarflow，turbulence，erosion，silting，cracking，wereestablished：andcorrespondingfiniteelementmethodprogramWSwasdevel

6、oped．Withthosepresumptionsandtheories，thehighpressureinjectionexperimentofHuizhoupumpedstoragepowerstationinGuangdongProvincewassimulatedbycontinuummethodandOdatensormethodcoupledwithstressfield．Curvesofwaterpressureheadversusflowquantities(P-acurves)wereachievedbynumericalmethod

7、．Theresulthasagoodagreementwiththatofhigh—pressureinjectionexperiment，andthephenomenonandresultsinthesimulationprocesswereanalyzed．ConclusionsweredrawnthatP-acurveisthesynthesesofthoseeffectsandthetypeofP—acurveisdeterminedbythecombinationofthoseeffects．Keywords：numericalsimulati

8、onhigh—·pressureinjectionexperiment；coup