Transcript Construction Review Project: Schedule:

PAR 1085 – SOUTH SECONDARY IMPROVEMENTS
PROJECT
Eric M. Wetzel
Carollo Engineers, Inc.
Bentley Be Inspired Awards
November 13, 2012
Outline
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PAR 1085 South Secondary Improvements Project
What is 4D?
Building the 4D Model
South Secondary
4D Visualization
Improvements
Project
The Benefits
Summary
Questions
South Secondary Improvements Project
Metro Wastewater Reclamation District
Robert W. Hite Treatment Facility
(The District)
South Secondary Improvements Project
• $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
Ammonia Facility
Stage 5, RAS Pump Stations,
Secondary Clarifier Modifications
DAF & Centrate
Modifications
South Aeration Complex
(SAC)
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
South Secondary Improvements Project
What is 4D?
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
South Secondary Improvements Project
Building the 4D Model
3D Model
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Software Used
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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
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99 Reference Files
Completed during the design phase
Finalist – Be Inspired Awards 2011
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
Construction Schedule
• Software: Primavera P6
v7.0
• Extremely detailed
consisting of 12,143
activities
Structural Drawings vs. Construction Schedule
Linking the Model and Schedule
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Import accepted Primavera P6
Schedule into Bentley Navigator V8i
Link activities in Schedule to Item Sets
in the Model
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Drop and Drag
After Linking is complete:
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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.)
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Import frames to Camtasia for .AVI
development
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
PAR 1085 South Secondary Improvements Project
4D Model – South
West Blower Building
South Secondary Improvements Project
The Benefits
How does this help?
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
Example 1: Concrete Pour Sequence Compliance
Schedule Bust: Wall is
and
being
Slabpoured
are poured
priorconcurrently.
to Slab
A single bust = Potentially 14 calendar days.
Example 2: Missing Activities/Links or
Inappropriate Logic
“A” – Schedule did
Missing Activities/Links
not reflect updated
CJs.completion of
Upon
linking the schedule to
the model, linked items
can
be turned
off to
“B”
– Threshold
of
show only model items
two
facilities.
Not
not
linked
to an activity
accounted for in
schedule
B
A
Example 3: Visual Assessment of Actual vs. Planned
10/2/2012
4D Benefits – Cont.
• An updated 3D model
for Owner’s use
• Public Outreach
• Identification of nonconformance with
Contract
• Ability to look-ahead
and plan for future
Work activities
South Secondary Improvements Project
Summary
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
Questions?
Eric M. Wetzel, LEED-AP BD+C
Project Controls
Carollo Engineers, Inc.
390 Interlocken Crescent, Broomfield, CO 80021
(303) 286-3047