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千枚岩地层大深度钻孔灌注桩施工关键技术
Title:ConstructionKeyTechnologiesforLargeDeepDrilledShaftsintheQianmaiyunFormation
Abstract:
ThispaperfocusesontheconstructionkeytechnologiesforlargedeepdrilledshaftsintheQianmaiyunFormation.TheQianmaiyunFormationisageologicalformationknownforitschallengingdrillingconditionsduetoitshardrocknature.Thesuccessfulconstructionofdeepdrilledshaftsinthisformationrequirestheapplicationofadvancedtechniquestoensurestabilityandquality.Thispaperdiscussesthekeytechnologiesinvolvedintheconstructionprocess,includingdrillingequipmentselection,drillingfluidmanagement,holecleaning,pilereinforcement,andqualitycontrol.ThepurposeofthispaperistoprovideacomprehensiveunderstandingofthechallengesandsolutionsregardinglargedeepdrilledshaftconstructionintheQianmaiyunFormation.
1.Introduction:
1.1Backgroundandsignificance
1.2Objectivesandscope
1.3Methodology
2.GeologicalCharacteristicsoftheQianmaiyunFormation:
2.1Formationcharacteristics
2.2Physicalandmechanicalproperties
2.3Drillingchallenges
3.EquipmentSelection:
3.1Drillingrigselection
3.2Drillbitselection
3.3Auxiliaryequipment
4.DrillingFluidManagement:
4.1Drillingfluidselection
4.2Rheologicalpropertiescontrol
4.3Environmentalconsiderations
5.HoleCleaning:
5.1Jettingandairflushingtechniques
5.2Slurrydisplacementmethods
5.3Monitoringandevaluationofholecleaningeffectiveness
6.PileReinforcement:
6.1Steelcagefabricationandinstallation
6.2Groutingmaterialselection
6.3Groutingtechniques
7.QualityControl:
7.1Testingandinspectionduringconstruction
7.2Pileintegritytesting
7.3Non-destructivetestingtechniques
8.CaseStudy:
8.1Projectoverview
8.2Constructionchallengesandsolutions
8.3Lessonslearned
9.Conclusion:
9.1Summaryofkeytechnologies
9.2Recommendationsforfutureresearch
9.3Practicalimplications
ThispaperaimstoprovideacomprehensiveoverviewoftheconstructionkeytechnologiesrequiredforlargedeepdrilledshaftsinthechallengingQianmaiyunFormation.Theinformationpresentedwillbebeneficialtoengineers,contractors,andresearchersengagedintheconstr