Page 148 - 《水资源与水工程学报》2025年第2期
P. 148

!36 "!2 #                         & ' ( ) & * + , -                               Vol.36No.2
               2025 $ 4 %               JournalofWaterResources&WaterEngineering                 Apr.,2025

            DOI:10.11705/j.issn.1672-643X.2025.02.17


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                 FGHIJ:TV743   KLMNO:A    KPQJ:1672643X(2025)02014409
                Comprehensivemeasurementofgeostressandanalysisofinitialstressfield

                    inversioninahighheadpumpedstoragepowerstationinXinjiang

                                                                                   2
                                   1
                                                    1,2
                                                                      2
                        JIANGJian,DONGZhihong ,ZHOUChunhua,LUOSheng,WANGBin                     2
               (1.CollegeofCivilEngineeringandArchitecture,ChinaThreeGorgesUniversity,Yichang443000,China;2.KeyLaboratoryof
             GeomechanicsandEngineering ,MinistryofWaterResources,ChangjiangRiverScientificResearchInstitute,Wuhan430010,China)
                 Abstract:Accurateinsitustressmeasurementandrefinednumericalinversionanalysisplayanimportant
                 roleinthesafeconstructionandefficientoperationofhighheadpumpedstoragepowerplants.Thisstudy
                 focusesonaplantlocatedinXinjiangundercomplexgeologicalconditions.A comprehensiveinsitu
                 stressmeasurementcampaignisconductedbymeansoftheconventionalhydraulicfracturingmethod ,the
                 threedimensionalhydraulicfracturingmethod ,andtheaperturedeformationmethod.Thesemeasure
                 mentsarecombinedwithmultiplelinearregressionanalysistoachievetheinversionandreconstructionof
                 theinsitustressfieldfortheanalysisofstressdistributioncharacteristicsandantisplittingcapacityofthe
                 surroundingrockatkeylocationsalongthewaterconveyancetunnel.Theresultsdemonstratesstrongcon
                 sistencyinstressvaluesandorientationsacrossthethreemeasurementmethodsattheintersectionofthe
                 insitustressboreholes ;thiscrossvalidationcanimprovetheoverallaccuracyofthemeasurements.The
                 calculatedstressvaluesbythenumericalinversionmodelbasedonthecomprehensiveinsitustressdata
                 areconsistentwiththoseoftheinsitumeasurements ,demonstratingthemodel’sreliabilityforlargescale
                 stressfieldinversionandreconstructionintheengineeringarea.Thestressdistributionalongthewater
                 conveyancetunnelrevealssignificantdisturbancesintheinsitustressfieldcausedbytopographyandge

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