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基于回弹模量法施工的公路路基工后沉降监测.docx

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基于回弹模量法施工的公路路基工后沉降监测 Abstract Highwaysubgradesettlementisacommonprobleminroadconstruction.Topreventsubgradesettlementandensurethestabilityandsafetyofthehighway,itisessentialtomonitorsubgradesettlementduringconstruction.Thisstudyaimstoinvestigatethemonitoringofsubgradesettlementinhighwayconstructionusingthereboundmodulusmethod.Thestudydiscussestheprinciplesandproceduresofthereboundmodulusmethodandhighlightstheadvantagesofthismethodoverothertraditionalmethods.Additionally,thestudypresentsacasestudyofsubgradesettlementmonitoringusingthereboundmodulusmethodintheconstructionofahighway. Introduction Subgradesettlementinhighwayconstructioncanposeasignificantthreattothestabilityandsafetyoftheroad.Constructionofhighwaysinvolvesearthworkactivitiesthatcancausesoildeformationandconsolidation,leadingtosubgradesettlement.Subgradesettlementcanleadtodeformationoftheroad,causingunevennessanddamage.Therefore,itiscrucialtomonitorsubgradesettlementduringconstructionandtakenecessarymeasurestopreventormanageit.Traditionally,geotechnicalinvestigationsareusedtoassesssubgradestabilitybeforeroadconstruction.However,traditionalmethodscannotmonitorsubgradesettlementduringconstructioneffectively.Inrecentyears,thereboundmodulusmethodhasbeenusedtomonitorsubgradesettlementinhighwayconstruction. PrinciplesandProceduresoftheReboundModulusMethod Thereboundmodulusmethodisareliableandeffectivemethodofmonitoringsubgradesettlementinhighwayconstruction.Themethodinvolvestheuseofalightweightdeflectometer(LWD)tomeasuretheelasticmodulusofthesubgrade.TheLWDmeasuresthereboundingenergyofafallingmassandrelatesittothesubgrademodulus.Theprocedureinvolvesthefollowingsteps: 1.PreparetheLWDbycalibratingitandensuringthatitisinastableposition. 2.DeterminethereboundmoduliofthesubgradeusingtheLWDatregularintervals. 3.ProcessthedatacollectedfromtheLWDusingappropriatesoftware. 4.Analyzethedatatoevaluatethesubgradestabilityanddetectanysignsofsubgradesettlement. AdvantagesoftheReboundModulusMethod Thereboundmodulusmethodoffer