ExcelVBA自定義函數(shù)計算線路坐標(biāo)反算方法

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中圖分類號：U452 文獻標(biāo)志碼：A 文章編號：2095-2945（2025）18-0158-04

Abstract：SurveyingofLinearEngineeringProjectstypicallyinvolvestheseting-outandmappingoflongitudinalandcros sectionsforlinearbuildings（structures）suchashighways，railways，subways，andpowertransmisionlines.Thealignmentofsuch projectsisneverastraightlinebutratheracombinationofmultiplestraightsegmentsandcurves.Insubwayalignments， horizontalcurvesaregenerallcomposedofstraightlines，circularcurves，andtranstion（spiral）curves.Thispaperintroducesa customfunctionforcoordinateinversecalculation（ie.，deteminingchainagefromcordinates）basedontheintersectionpoint method，usingaovetioalaligentonsistingofaightlinsrasitiocvesdicularurves.Timproveiecy numeroussoftware tolsareavailable today.Drawingonnearlyadecadeofexperienceinsubwaytunnelconstructionand operationalmonitoring，thisstudyleveragesExcelVBAforsecondarydevelopmenttoexpeditedataprocesing.AcustomExcel functionwasdeveloped，takingthealignmentparameters（basedontheintersectionpointmethod）asinputs.Byinputing measuredpointcordinates，thefunctionautomaticallyidentifiesthecorespondingalignmentsegment（straight，transition，or circularcurve）andcomputesthechainage.SinceExcelfunctionsareuser-friendlyandallowbatchprocessingviacopy-paste operations，thismethodenablesbatchcalculationofchainagesfromcoordinatedata.Thisapproachalsofacilitatessubsequent tasks such as cross-section ploting and overbreak/underbreak analysis in tunnel construction.

Keywords：Excel VBA programming;coordinate-to-chainage inversecalculation;automatic inversecomputation;custom functions;batch processing

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