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Studyonhydraulicfracturingofhighconcretedam consideringsurfacetensionofwater
1,2
2
1
2
WUYangfeng,WANGYang,JIAJinsheng ,DINGLianying,SHANBingyin
(1.SchoolofCivilEngineering,TianjinUniversity,Tianjin 300350,China;
2.ChinaInstituteofWaterResourcesandHydropowerResearch,BeijingIWHR - KHLCo.,Ltd,Beijing 100038,China;
3.CGCOCWaterandElectricEngineeringCo.,Ltd,Zhengzhou 470016,China)
Abstract:HydraulicfracturingisapotentialsafetyhazardforhighconcretedamsandhighRCCdamsover200
meters.Inordertostudythehydraulicfracturingmechanism ofhighconcretedam ,anewtypeofconcretehigh
pressurewatersplittingspecimenwasdeveloped ,andthehydraulicfracturingandpneumaticfracturingtestsunder
thesameconditionswerestudiedbyusingtheinventedspecimen.Theresultsshowthatthewaterpressureofhy
draulicfracturingishigherthanthatofpneumaticfracturingunderstaticpressure ,andthesurfacetensionofwater
intheprocessofconcretefracturehasaresistancetocrackpropagation.Basedonthetest ,theexpressionofwater
surfacetensionresistancetosplittingeffectisproposed ,andtheconcretehydraulicsplittingmodelconsideringwa
tersurfacetensionisconstructedbyusingthestressintensityfactormethodatthecracktipinconcretefractureme
chanics.Themodelcalculationresultsareingoodagreementwiththeexperimentalresults.Thewatersurfaceten
sionmodelisusedtoanalyzethehydraulicfracturingeffectof200metersgravitydams ,whichcanfurtherimprove
thedesignofsuperhighconcretedamsconsideringhigh - pressurewaterfracturing.
Keywords:highconcretedams; hydraulicfracturing; pneumaticfracturing; surfacetension; stressintensity
factors
(责任编辑:韩 昆)
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