Delivering 3D Engineered Model Data for Highway Construction

Delivering 3D Engineered Model Data for Highway Construction

Objectives After completing this module, you will be able to: Describe how 3D engineered models are created in design Describe how contractors use 3D models Explain the importance of delivering 3D models pre-bid Discuss legal frameworks for 3D electronic data Describe ways to deliver 3D models to contractors 2

Creating the 3D Design Model Principles of Roadway Design for Design- Bid-Build Projects Communicate design intent Design documents for bidding calculations Design documents for building project Design documents for paying quantities 3

Creating the 3D Design Model 3D Information Embedded in the Design 4 Source: Parson Brinckerhoff

Creating the 3D Design Model 5 Source: Bentley Systems, Inc.

Creating the 3D Design Model Paradigm Shift 6 Source: MoDOT and Bentley Systems, Inc.

Creating the 3D Design Model Level of Detail for Different Purposes Calculating Quantities Automated Machine Guidance Collaboration Visualization 7

Creating the 3D Design Model Level of Detail XS Interval for AMG and Quantities Every 10-25 feet on non-transitional areas depending on terrain, and length of project Tighter 1-5 ft interval in critical sections such as gore, intersections, etc. At every critical point such as cardinal points, SE transition points, high and low elevations. 8

Creating the 3D Design Model For Contractor Purposes Type Density Subgrade Surface Base Surface Format Timing Authorized Use 9 Source: Parsons Brinckerhoff & ARA for FHWA

Creating the 3D Engineered Model Level of Detail Collaboration/Visualization Purpose Level 1 - AMG Level 2 Design Review/Collaboration Level 3 Basic Visualization Level 4 Intermediate Visualization Desired Outcome Alignments, profiles, 3D string-lines, components and surfaces Raster imagery terrain with 3D components with material assignments and striping Level 2 + trees, car simulation and basic photo matching Level 3 + basic lighting Level 5 Advanced Visualization Level 4 + high rendering visualization 10

Contractor Use of 3D Engineered Models Estimates for Bidding Source: AGTEK 11

Contractor Use of 3D Engineered Models Plan the Construction Means & Methods Problem: Construct a deep utility pipe of variable depth that exceeds the maximum allowable shored excavation depth. Estimate the cost of this activity. Plan the equipment and labor required for the activity. 12

Contractor Use of 3D Engineered Models Creating a 3D Model to Evaluate the Construction Activity Source: Trimble 13

Contractor Use of 3D Engineered Models Extract Quantities and Visualize the Impact on Adjacent Activities Source: Sundt Construction 14

Contractor Use of 3D Engineered Models Planning Complex Activities Source: Walsh Construction 15

3D Models for Executing Construction Using the 3D Model to Execute the Construction Activity Source: Sundt Construction 16

Contractor Use of 3D Engineered Models How Contractors Build 3D Models Analyze Data Meet with Project Managers Supplement/ Recreate Models Review Means & Methods Migrate Data to the Field Share models with Engineering and Subcontractors Review & Backcheck Models Create Grading & Utility Models 17

Contractor Use of 3D Engineered Models Digitizing Raster and Vector Plans Source: Sundt Construction 18

Digital Project Data Delivery Design Data that Contractors Recreate and Augment What s in your design workflow? Releasing Corridor models for bidding Outputting line strings for bidding Outputting LandXML for bidding Proposed TINs for earthworks Corridor models for cross-sections and earthworks Criteria for cross-sections and earthworks CADD alignments, profiles and superelevations 0% 20% 40% 60% 80% 100% Source: Creating 3D Engineered Models for Construction Webinar 2 Live Poll (196 responses) 19

Digital Project Data Delivery Receptiveness to Sharing Design Data Electronically Do you have concerns about releasing Digital Data for Information Only? Yes, I'd rather not release any digital data Yes, but I'll release PDFs of the plans Yes, but I'll release Alignments, Control Points, and Exisiting Surfaces Yes, but I'll release LandXML & 3D line strings No, I'd release all data Source: Creating 3D Engineered Models for Construction Webinar 2 Live Poll (192 responses) 20

Digital Project Data Delivery Electronic Signed & Sealed PDF s PowerGeopak 21 Source: MoDOT and Bentley Systems, Inc.

Digital Project Data Delivery Digital Sign & Seal Source: Utah Department of Transportation 22

Digital Project Data Delivery MoDOT s Current Practices Provided Pre-Bid for Information Only Type of Project Projects with significant amount of cross-sections Digital Data Provided Survey control points, available alignments and profiles, existing DTM, PFG surface, and when possible an alternate surface. 23

Digital Project Data Delivery MoDOT s Preliminary Plans for the Future Provided Pre-Bid for Information Only Type of Project Digital Data Provided Format Bridge and/or Resurfacing Survey control points, available alignments and profiles LandXML, and native PowerGeopak Reconstruction Widening Guardrail Survey control points, existing DTM, available alignments and profiles, 3D stringlines, all available proposed surfaces, such as subgrade, aggregate, and pavement of the reconstruction LandXML and native PowerGeopak for cogo & surfaces DGN for 3D linestrings and plan graphics Expansion/New Construction Paving Intersection Improvements Survey control points, existing DTM, available alignments and profiles, 3D stringlines, all available proposed surfaces, such as subgrade, aggregate, and pavement of all new construction LandXML, and native PowerGeopak for cogo & surfaces DGN for 3D linestrings and plan graphics 24

Digital Project Data Delivery Factors to consider when delivering 3D Models for construction: Type Density Subgrade Surface Base Surface Format Timing Authorized Use 25

Digital Project Data Delivery Describing the Data Data Type Existing ground surface DTM Coordinate Control Data Alignments and Profiles Superelevation Proposed ground surface DTMs Surface breaklines Roadway Corridor Models Description Needed Horizontal and vertical datum and units Horizontal and vertical datum and units Horizontal and vertical datum and units Reference alignment Horizontal and vertical datum and units Associated surfaces Horizontal and vertical datum and units Naming conventions, model structure, model density, dependent resource files 26

Legal Frameworks for Electronic Deliverables For Information Only Source: Missouri DOT 27

Legal Frameworks for Electronic Deliverables For Information Only Source: Michigan Department of Transportation 28

Legal Frameworks for Electronic Deliverables For Information Only Contractor retains all responsibility to complete the work in accordance with the engineering intent conveyed in the contract documents Source: New York State Department of Transportation 29

Recap You should now be able to: Describe how 3D engineered models are created in design Describe how contractors use 3D models Explain the importance of delivering 3D models pre-bid Discuss legal frameworks for 3D electronic data Describe ways to deliver 3D models to contractors 30

Citation References Missouri Department of Transportation Support for EDC Deployment Activities by Parsons Brinckerhoff and Applied Research Associates Inc. for FHWA under Contract DTFH61-12-D-00016

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