DIGITAL MODELS FOR DIGITAL MODELS FOR CONSTRUCTIONCONSTRUCTION

Richard Tabe (PB)Richard Tabe (PB)

DIGITAL DATA FOR CONSTRUCTIONDIGITAL DATA FOR CONSTRUCTION

HISTORYHISTORY BENEFITSBENEFITS GPS Machine GradingGPS Machine Grading THE MEANSTHE MEANS LAND XMLLAND XML THE MODELTHE MODEL QUESTIONSQUESTIONS

HISTORYHISTORY

• Lesser Projects – began in early 90’sLesser Projects – began in early 90’s• 11stst Major Projects Machine Grading Major Projects Machine Grading

• Craigieburn BypassCraigieburn Bypass• EastLinkEastLink

• Meeting at 101 Collins with stakeholdersMeeting at 101 Collins with stakeholders

BENEFITSBENEFITS

• Eliminate transference errorsEliminate transference errors• Highest most complete level of data Highest most complete level of data

availableavailable Fills the holes left by the cross sectionsFills the holes left by the cross sections Provides x,y,z’s at all points on the design Provides x,y,z’s at all points on the design

surfacesurface Indicates boning lines and intervalIndicates boning lines and interval

BENEFITS (continued)BENEFITS (continued)

• Streamline CheckingStreamline Checking• Visualisation of designVisualisation of design• Reduce Construction TimeReduce Construction Time• Distribution of Data to StakeholdersDistribution of Data to Stakeholders• Reduce CostsReduce Costs

GPS Machine GradingGPS Machine Grading

• Automated or Manual ControlAutomated or Manual Control• Interrogation of design liveInterrogation of design live

THE MEANSTHE MEANS

• CAD Files – 2D and 3D (CAD Files – 2D and 3D (survey manipulation survey manipulation required)required)

• Land XML of Digital Terrain ModelLand XML of Digital Terrain Model Surveyor may not use same packageSurveyor may not use same package Land XML- Universal DXFLand XML- Universal DXF

LAND XMLLAND XML

• Geometry – Horizontal and VerticalGeometry – Horizontal and Vertical• Digital Terrain Model- Named Features and Digital Terrain Model- Named Features and

TrianglesTriangles• Application Add-inApplication Add-in• Reference – “Bentley InRoads Group of Reference – “Bentley InRoads Group of

Products- Exporting InRoads Data for Products- Exporting InRoads Data for Construction”Construction”

LAND XMLLAND XML

LAND XMLLAND XML

E14 EBEN.xml

E14 EBEN GEOMETRY.xml

THE MODELTHE MODEL

• 2D Functional2D Functional• 3D Strings3D Strings• Complete – no omissionsComplete – no omissions• Verification – the sameVerification – the same• Reference Files – no manual editingReference Files – no manual editing• Design Change – no shortcutsDesign Change – no shortcuts

““If you can’t trust the model, you can’t trust the If you can’t trust the model, you can’t trust the plans”plans”

West Gate UpgradeWest Gate Upgrade

DISCUSSIONDISCUSSION ““If you can’t trust the model, you If you can’t trust the model, you

can’t trust the plans”can’t trust the plans”

““Vision is the art of seeing what is Vision is the art of seeing what is invisible to others”- Jonathan Swiftinvisible to others”- Jonathan Swift