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抽水蓄能水电站地质条件对地下洞室开挖施工的影响分析.docx

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抽水蓄能水电站地质条件对地下洞室开挖施工的影响分析 Title:AnalysisofGeologicalConditions'ImpactonUndergroundChamberExcavationinPumpedStorageHydroelectricPowerPlants Introduction: Pumpedstoragehydroelectricpowerplants(PSHPPs)playavitalroleinensuringefficientenergystorageandsupplyinmodernpowergrids.Thesepowerplantsrelyonundergroundchambersforthestorageandreleaseofwatertogenerateelectricity.However,thegeologicalconditionsatthesiteofaPSHPPsignificantlyinfluencethefeasibilityandsafetyoftheundergroundchamberexcavationprocess.Thispaperaimstoanalyzetheimpactofgeologicalconditionsontheexcavationandconstructionofundergroundchambersinpumpedstoragehydroelectricpowerplants. GeologicalFactorsImpactingExcavation: 1.RockStrengthandStability: TherockstrengthandstabilityattheproposedPSHPPsitearecrucialconsiderationsforexcavation.Weakorunstablerocksmayresultincollapsesorlandslidesduringtheexcavationprocess,posingriskstoworkersanddelayingconstructionprogress.Detailedgeologicalsurveysandrockstrengthassessmentsareessentialtodetermineappropriateexcavationtechniquesandstabilizethechamber. 2.PresenceofFaultsandFractures: Faultsandfracturesintherockmasscanleadtowaterleakage,reducingtheeffectivenessofwaterstorageandcompromisingthestructuralintegrityoftheundergroundchamber.Detailedmappingandanalysisofsubsurfacestructuresarenecessarytomitigatepotentialrisksanddesignappropriatesupportsystemsthatminimizewaterseepage. 3.GroundwaterConditions: Thegroundwaterconditionsinfluencetheexcavationprocess,asexcessivewaterinflowcanhinderprogressandposesafetychallengesforworkers.Groundwaterlevelsshouldbeestimatedandmanagedthroughdewateringtechniques,suchaswellpointsordeepwells,dependingonthesite'shydrogeologicalcharacteristics. 4.GeologicalDiscontinuities: Geologicaldiscontinuities,suchasjoints,beddingplanes,andfaults,canimpactthestabilityoftheexcavationwallsandroof.Thesediscontinuitiesmayleadtoinstability,rockfalls,orcave-insinthechamber.Engineeringmeasures,includingrockreinforcementtechniqueslikeanchoring,shotcrete,orbolting,arenece