Eric M. Wetzel Carollo Engineers, Inc. Bentley Be Inspired Awards November 13, 2012.
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Transcript of Eric M. Wetzel Carollo Engineers, Inc. Bentley Be Inspired Awards November 13, 2012.
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PAR 1085 – SOUTH SECONDARY IMPROVEMENTS PROJECT
A 4D GIANT
Eric M. WetzelCarollo Engineers, Inc.
Bentley Be Inspired AwardsNovember 13, 2012
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• PAR 1085 South Secondary Improvements Project• What is 4D?• Building the 4D Model• 4D Visualization• The Benefits• Summary• Questions
South Secondary Improvements Project
Outline
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South Secondary Improvements Project
Metro Wastewater Reclamation District Robert W. Hite Treatment Facility
(The District)
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DAF & Centrate Modifications
Ammonia Facility
Stage 5, RAS Pump Stations, Secondary Clarifier Modifications
South Aeration Complex (SAC)
• $136 million w/ potential $1.8 million bonus for early completion
• Meets new wastewater discharge criteria and adds capacity
• Very tight schedule to meet permit compliance
South Secondary Improvements Project
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Carollo Engineers’ Role
• Design Engineer & Owner’s Representative during construction
• Review Contractor’s construction schedule to verify compliance with the Contract
• Responsible for 3D and 4D models
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What is 4D?
South Secondary Improvements Project
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What is 4D?
• 4D is a tool that links a 3D CAD model with a construction schedule
• The resulting 4D model allows visualization of the planned construction sequence
3D Model + Schedule = 4D Visualization
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Building the 4D Model
South Secondary Improvements Project
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3D Model
• Software Used Bentley Microstation V8 XM Bentley Architecture V8 XM Bentley Structural V8 XM PlantSpace Design Series V8 XM InRoads XM ProjectWise V8i ProjectWise InterPlot Navigator V8i
• 65 Total Models Anything above 2” pipe was modeled
• 99 Reference Files• Completed during the design phase• Finalist – Be Inspired Awards 2011
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3D Model Elements
• To achieve a 4D visualization, the 3D model must be designed into constructible elements Construction Joints Pipe Joints
• 3D model must match the depth of the construction schedule
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Construction Schedule
• Software: Primavera P6 v7.0
• Extremely detailed consisting of 12,143 activities
Structural Drawings vs. Construction Schedule
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Linking the Model and Schedule
• Import accepted Primavera P6 Schedule into Bentley Navigator V8i
• Link activities in Schedule to Item Sets in the Model Drop and Drag
• After Linking is complete: Close Navigator V8i and Open linked
model in Microstation Use Animation Producer in
Microstation to create image frames Set time frame (May ‘11 – June ‘13) Set frame duration (daily, weekly, etc.)
Import frames to Camtasia for .AVI development
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Visualizing the Visualization
• While watching the 4D visualization• Every start activity will turn
the item set within the model green
• Every finish activity will turn it to the model color. Yellow in this example
Example: Concrete – Rebar, Form, Pour, Cure
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4D Model – South West Blower Building
PAR 1085 South Secondary Improvements Project
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The BenefitsHow does this help?
South Secondary Improvements Project
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4D Benefits
• Tool for Risk Mitigation• 4D analysis validated Contractor’s realistic ability
to obtain full bonus ($1.8 million)• Detailed review and identification of issues in the
schedule
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Example 1: Concrete Pour Sequence Compliance
Schedule Bust: Wall and Slab are poured concurrently. A single bust = Potentially 14 calendar days.Schedule Bust: Wall is being poured prior to Slab
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Example 2: Missing Activities/Links or Inappropriate Logic
“A” – Schedule did not reflect updated CJs.
“B” – Threshold of two facilities. Not accounted for in schedule
AA
B B
Missing Activities/Links
Upon completion of linking the schedule to the model, linked items can be turned off to show only model items not linked to an activity
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Example 3: Visual Assessment of Actual vs. Planned
10/2/2012
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4D Benefits – Cont.
• An updated 3D model for Owner’s use
• Public Outreach• Identification of non-
conformance with Contract
• Ability to look-ahead and plan for future Work activities
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Summary
South Secondary Improvements Project
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Summary
• 4D tool mitigated significant risk associated with a complex and accelerated schedule
• Minimize logic loops, missing activities, non-conformance, etc, to account & save significant time in the schedule. Estimated at 60 working days to date
• A tool to engage stakeholders without a tangible connection to the project
• An updated 3D model that can be used for facility maintenance or modifications
• Versatile Bentley software was utilized in all facets of 3D and 4D development No hardware or software costs incurred to produce 4D
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Questions?
Eric M. Wetzel, LEED-AP BD+CProject ControlsCarollo Engineers, Inc.390 Interlocken Crescent, Broomfield, CO 80021(303) 286-3047