erapiddevelopmentoftunnelengineeringtechnology,thetraditionalconstructionmethodscan’tkeepupwiththepaceofthetimes.However,theemergenceofBIMtechnologyhasbroughtanewrevolutioninthetunnelconstruction.Inthepaper,accordingtothecharacteristicsoftunnellining,itchoosesBIMessentialmodelingtoolCATIAanddescribesthegeneraltheoryandruleofCATIAsecondarydevelopmentfunctionindetailonthebasisofopendatainterfaceofsoftware.Whatismore,itfurtherelaboratesthedevelopmentprocessofautomationobjectprogrammingbasedonCATIA.Intheend,asimpletunnelliningintelligentdesignprogramwrittenbyVB,whichcanrapidlygeneratealining3DmodelintheCATIApartmodule,thenverifythatthesecondarydevelopmentexpandandenhancetheBIMTechnology,andbroadentheapplicationofBIMTechnologyinthetunnelfield.Keywords:BIM;CATIA;Secondarydevelopment;Tunnellining
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