3D Technologies (e.g., AMG) and Seamless (?) Data Flows: Impediments and Strategies
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Transcript of 3D Technologies (e.g., AMG) and Seamless (?) Data Flows: Impediments and Strategies
3D Technologies (e.g., AMG) and 3D Technologies (e.g., AMG) and Seamless (?) Data Flows: Seamless (?) Data Flows:
Impediments and Strategies Impediments and Strategies
TRB AFB80 Summer Committee MeetingEstes Park, CO
July, 2009
Alan [email protected]
OutlineOutline
AMG Specification Development.
3D Technologies Implementation Planning.
Data Flow Obstacles: Design / Contracting / Construction.
OutlineOutline
How AFB80 Can Help.
– Educational Aspects.
– Technological Aspects.
– Institutional Aspects.
– Legal Aspects.
AMG Subgrade Specification AMG Subgrade Specification Development Process (WisDOT/CMSC)Development Process (WisDOT/CMSC)
Advisory Advisory GroupGroup
20062006
20072007 20082008
20092009Literature Literature
Review and Review and Industry Industry SurveySurvey
Specification Specification FrameworkFramework
Stakeholder Stakeholder WorkshopWorkshop
11stst SpecificationSpecification
11stst Pilot Pilot ProjectsProjects
22ndnd SpecificationSpecification
22ndnd Pilot Pilot ProjectsProjects
Final SpecificationFinal Specification
Contractor Contractor and Region and Region InterviewsInterviews
Subgrade Specification ComponentsSubgrade Specification ComponentsNo subgrade stakes required.Engineer can require reversion to conventional
methods.Contractor’s GPS work plan:
– Equipment; staff qualifications; project control; site calibration and checks; equipment calibration; subgrade checks.
3D model:
– Department provides “survey package” of digital data.
– 3D model building is contractor’s responsibility; 2D plans are the contract documents; initial model and revisions provided to department.
Subgrade Specification ComponentsSubgrade Specification ComponentsSite calibration:
– Greater of 6 control points or 2 per mile; daily checks at independent control to be within ±0.10 ft. horizontally and ±0.05 ft. vertically.
Subgrade checks (against plans, not model):– 20 or more per roadway mile, project, or stage;
randomly selected full stations; 4 of any 5 consecutive must be within ±0.10 ft. of plan elevation; engineer observes and uses for approval; engineer can make and / or require additional subgrade checks.
Current and Future Expectations for Current and Future Expectations for AMG SpecsAMG Specs
Specification is optional special provision replacing subgrade staking as bid item on all 2009 projects that include grading.
Will become component of general specifications for 2010 and beyond.
WisDOT will monitor performance of subgrade spec while embarking on development of spec for base course, then paving.
WisDOT deploying 3D design technology – headed towards delivery of 3D models as design product.
Training provided to 80 project engineers (2008, 2009). More training expected over next 2-3 years.
3D Technologies Implementation 3D Technologies Implementation PlanningPlanning
2008: WisDOT implementing AMG and 3D design software and processes.– Preliminary study on wider use of 3D models
throughout design and construction.– Stakeholder workshop on interim report: AMG and
3D design among larger group of 3D technologies and processes interrelated by dependencies, synergistic benefits, and shared impediments.
– Undertook broader effort to develop implementation plan for 3D technologies for design and construction in general.
3D Technologies Implementation 3D Technologies Implementation PlanningPlanning
Plan components:– Vision statement.– Six Initiatives (on-going or proposed) with
backgrounds, issues, stakeholders, recommendations, goals, timelines, levels of effort, priorities, benefits, relationships with other initiatives, and responsible parties.
– Dependencies among initiatives and goals.– Umbrella management strategy.
3D Technologies Implementation 3D Technologies Implementation PlanningPlanning
Vision statement:
“Adoption of 3D methods and seamless data flows throughout initial survey, design, contracting, construction, as-built survey, payment, and other applications included within the infrastructure lifecycle.”
– Opens the door beyond design and construction.
Initiatives, Goals, Timelines, PrioritiesInitiatives, Goals, Timelines, Priorities
Initiatives, Goals, Timelines, PrioritiesInitiatives, Goals, Timelines, Priorities
3D Technologies Implementation 3D Technologies Implementation PlanningPlanning
Dependencies among initiatives: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Automated Machine Guidance
Field Technology
and Inspection
Height Modernization
and Continuously-
Operating Reference Stations
DTM Data Collection
3D
Design
Infrastructure
Lifecycle Uses of 3D
Data
NOTE: An arrow indicates that if goals of the antecedent initiative are not met, then benefits of the subsequent initiative will be diminished.
AMG Base
Course and
Paving Specs
3D
Design 3D
Models for
PS&E 3D
Design 3D Model Standards
HMP and CORS
Implement 5-Year
Completion Plan
DTM Data Collection Implement Standards
& Procedures
DTM Data Collection
Pilot Standards
& Procedures
DTM Data Collection
Develop Standards
& Procedures
Field Technology
and Inspection Implement Inspection Automation
Field Technology
and Inspection Implement Rovers for
Construction
3D Design Existing
Pre-Deployment
Plan
3D Design
Extended Deployment
Plan
HMP and CORS Secure Funding
Field Technology
and Inspection Feasibility Studies
Field Technology
and Inspection
Implementation Plans
Infrastructure Lifecycle
Uses of 3D Data
Notes: 1) Initiative titles appear in bold font. 2) An arrow indicates diminished likelihood of meeting the subsequent goal if the antecedent goal is not met.
DTM Data Collection Fill Survey
Data Coordinator
Positions
DTM Data Collection
Revise Map Check Business Practice
DTM Data Collection Implement DTM-to-DTM for
Earthwork
Dependencies among goals.
Management StrategyManagement Strategy
Recommendations: Appoint a 3D Technologies Management Group,
chaired by a bureau director: Coordinates recommended activities. Provides reporting structure. Keeps upper-level management informed. Advocates for overall effort. Develops outreach mechanisms.
Management Group includes at least one representative from each initiative.
Implementation plan updated at least annually by Management Group.
Seamless Data Flows: Impediments and StrategiesSeamless Data Flows: Impediments and StrategiesNationwide study funded by Center for Freight
Infrastructure Research and Education (CFIRE) at UW-Madison. Project is mid-stream.
Target is this predicament:
Here’s what we do. Here’s what we should do.
Approach:– Literature search.– Nationwide survey.– 3-4 case studies.– Earthwork volumes methods comparison
(average-end-area vs surface-to-surface).– Design software functionality descriptions.– Guidelines and recommendations.
Seamless Data Flows: Seamless Data Flows: Impediments and StrategiesImpediments and Strategies
Being tested by AASHTO Technology Implementation Group on AMG.
Will go to remaining 42 states by mid-August.
Three sections (37 questions): Design, Contracting, Construction.
30-45 minutes to complete.
Web-Based SurveyWeb-Based Survey
Project reports, specification, guidance language, implementation plan, and training materials available right here on my thumb drive and all the time at
– http://cmsc.engr.wisc.edu/reports.html
Availability of MaterialsAvailability of Materials
How This Committee Can HelpHow This Committee Can Help
Four areas:– Educational.
– Technological.
– Institutional.
– Legal.
Educational NeedsEducational Needs
Principles and practice of:– RTK GNSS positioning.– CORS-based RTK positioning.– Automated machine guidance.
Target audience:– Project engineers and contractors.– Recall that many engineering curricula no
longer include courses in even basic surveying.
Web-based delivery for wide access.
Technological NeedsTechnological Needs
Test and demonstration of CORS support for AMG.
QA/QC procedures for AMG and associated model specs.
Guidelines / framework for state-level development of 3D model content and format standards.
Guidelines for engineering-scale DTM data collection.
Institutional NeedsInstitutional Needs
Benefits of AMG to state DOTs and, ultimately, taxpayers.– Are the productivity gains realized by
contractors passed on to DOTs?– Are the benefits to DOTs tangible and
quantifiable? – Why should DOTs develop specifications
for AMG?
Legal NeedsLegal Needs
“The downside is that if the model is expressly subordinate to traditional construction documents, the model cannot be relied upon during the pricing and construction process…”
Thomson and Miner (2006), in reference to building
information modeling (BIM)
Stay Abreast of and SupportStay Abreast of and Support
NCHRP 10-77 (pending): Use of Automated Machine Guidance (AMG) within the Transportation Industry.
“The objective of this research is to develop guidelines for use of AMG…guidelines should (1) include technical procurement specifications for AMG technology; (2) provide guidance on use of such technology in construction projects; and (3) address implementation of AMG technology into construction techniques (including provision of electronic files and models to support the AMG process).”
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