TACKLING ABC PROJECTS SPOTLIGHT ON SHRP2 RO4 GILA RIVER / SACATON ROAD BRIDGE A DESIGNER’S PERSPECTIVE Webinar presentation: ABC-UTC at Florida International University (FIU) January 18, 2018 1:00p-2:00p EST Mark A. Chase, PE AZTEC Engineering Group, Inc.
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TACKLING ABC PROJECTSSPOTLIGHT ON SHRP2 RO4
GILA RIVER / SACATON ROAD BRIDGEA DESIGNER’S PERSPECTIVE
Webinar presentation:ABC-UTC at Florida International University (FIU)
January 18, 2018 1:00p-2:00p ESTMark A. Chase, PE
AZTEC Engineering Group, Inc.
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
Collaboration
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
Agenda• Where (Project Location / Vicinity)• What (The A,B,C’s)
– Existing & New Bridge– Reasons for Project
• How (The 1,2,3’s)– Design – The Beginning and A New Door…– The Low-Tech Slide System
• Why (The $’s)• A Designer’s Perspective• Questions
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
Where (Location)
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
Where (Vicinity)
Gila River“1-Mile Wide,1-Foot Deep”
Sacaton, AZ
Bridge Site
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
Where (Vicinity)
Gila River“1-Mile Wide,1-Foot Deep”
Sacaton, AZ
Bridge Site
Photo Courtesy of Gila River Indian Community – www.gilariver.org
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
What (A,B,C’s)Existing Bridge (H145)
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
What (A,B,C’s)Existing Bridge (H145)
• Completed 1961– Replaced original timber bridge
• 4 x 35’ spans – Total Length ~ 140’– 45 Degree Skew
• CIP slab on precast rectangular beams– Plan Alternative – Conventional & Prestressed
• Steel H-Piling (Very Shallow)– Solid Pier Walls and Pile Cap Abutments
• No Approach Slabs or Expansion Joints
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
What (A,B,C’s)New Bridge (H144)
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
What (A,B,C’s)New Bridge (H144)
• Completed Spring 2015– Replaced original concrete slab bridge
• 2 x 70’ spans – Total Length ~ 140’– 15 Degree Skew
• CIP slab on PC/PS AASHTO Type III-Mod• Abut/Pier Caps on Drilled Shafts• Semi-Integral Abutments and Approach Slabs• Expansion Joint – At Pier
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
– Typical Boundary Conditions• No temporary supports in the river• Typical DOT Design & Construction Methods• In our Bridge Selection Report we mentioned ABC• Maintain Traffic ( selected “Approved” Detour)
– phased construction, shoofly detour, full closure alternatives
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)Design - The Beginning
AADT ~5100
6-MilesEach Way
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)Design - The Beginning
6-MilesEach Way
AADT ~5100
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)Design - The Beginning
AADT ~5100
6-MilesEach Way
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
• Budget ~$2 million < Estimate ~$2.7 million– Maintenance of Traffic
• 4-6 Month Detour remained a concern
• A New Door Opened…
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)…A New Door Opened
• SHRP2 Grant (ABC Toolkit/Techniques)– Opportunity for funding of ABC approach– Opportunity to improve Maintenance of Traffic– Opportunity to accelerate Construction– Grant Received Fall 2013 - $500K
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)…A New Door Opened
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)…A New Door Opened
• SHRP2 Grant (ABC Toolkit/Techniques)– Opportunity for funding ABC Approach– Opportunity to Improve Maintenance of Traffic– Opportunity to Speed Construction– Grant Received Fall 2013 - $500K
• Construction Manager/General Contractor (CMGC)– Also known as Construction Manager at Risk (CMAR)
• Contractor selected by Owner based on Qualifications• Guaranteed Maximum Price Negotiated with Owner
– CMGC RFQ / Selection Spring/Summer 2014– FNF Construction Inc., Phoenix, AZ
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)SHRP2 Toolkit & CMGC
• Worthy of separate Presentations on their own• Key Element of this Project’s success
– Applied FNF’s Construction Methods and Expertise• Lateral Slide was first for entire Project Team• Local, Available Tools / Equipment / Techniques• Keep it Simple
– Construction Cost Modeling vs. Engineering Estimates– Risk Identification During Design (Most Important)– Revisited ENTIRE Design
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)SHRP2 Toolkit & CMGC
• Revisited ENTIRE Design – Some Key Items– 15 degree skew / shift bridge North
• Construct new substructure under existing bridge & across existing road, outboard foundations
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)SHRP2 Toolkit & CMGC
• Revisited ENTIRE Design – Some Key Items– 15 degree skew / shift bridge North
• Construct new substructure under existing bridge & across existing road, outboard foundations
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)SHRP2 Toolkit & CMGC
• Revisited ENTIRE Design – Some Key Items– 15 degree skew / shift bridge North
• Construct new substructure under existing bridge & across existing road, outboard foundations
– Minimize Temporary Works• Reduce “Throw-Away”• Mitigate Risk of River Flows
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)Skew/Shift Substructure
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)Skew/Shift Substructure
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)Skew/Shift Substructure
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)Minimize Temporary Works
• Temporary Works Cost Money and Time• Temporary Works in River add Risk
– When will the river flow?– Can we mitigate?– Who owns the risk financially?
• Keep it Simple• Use available tools vs. buying/making expensive new ones
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)Minimize Temporary Works
• Temporary Support (Pier)
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)Minimize Temporary Works
• Temporary Support (Pier)
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)Minimize Temporary Works
• Temporary Support (Pier)
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)Minimize Temporary Works
• Permanent “Temporary” Support (Abutment)
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)Minimize Temporary Works
• Permanent “Temporary” Support (Abutment)
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)Minimize Temporary Works
• Permanent “Temporary” Support (Abutment)
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)Minimize Temporary Works
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)The Low-Tech Slide System
• Keep it Simple
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)The Low-Tech Slide System
• Keep it Simple
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018
How (1,2,3's)The Low-Tech Slide System
• Keep it Simple
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Gila River / Sacaton Road BridgeA Designer’s PerspectiveJanuary 18, 2018