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PRIMROSE EAST BRIDGE
Implementation of Folded Plate Technology & Geosynthetic Reinforced Soil-Integrated
Bridge System
2016 Concrete Paving WorkshopJason Volz
NDOR Construction
Primrose BridgePrimrose East Bridge:
• Constructed Fall 2014
• On a county road east of Primrose
• Contractor: Simon Contractors
• Designer: NDOR Bridge Division
Primrose BridgeNew Technologies:
• GRS Abutment• Folded Plate
Girder• Ultra-High
Performance Concrete
Geosynthetic Reinforced Soil (GRS) Integrated Abutment:
• Accelerated Construction
• No Crane/Pile Hammer
• No Specialized Labor
Folded Plate Girder:
• Developed at UNL
• Light Weight
Ultra High Performance Concrete:
• 21,000 psi at 28-days
• Narrow Joints• Minimal
Shrinkage
Primrose BridgeOther Innovative Features:
• Pre-Fabricated Bridge Elements
• Accelerated Bridge Construction (ABC)
DECK CONSTRUCTION:
• Girders Delivered July 1st
• Offsite location used for casting deck
GIRDER DELIVERY• Elevation and
Layout of Girders Matched Bridge
SHORED CONSTRUCTION• No Camber in
Girders• Required
Continuous Unyielding Support
DECK FORMING• Formed and
poured all at once
• Prevented problems with bar interference
DECK POUR• 47BD-4000• White Pigment/
Wet Burlap Cure
8” DECK JOINT• Required
exposed aggregate finish.
• Forms treated with set-retarder
• Power washed 12-24 hours after pour
LIFTING DEVICES• Orientation
required two cranes
BRIDGE SITE• Large Drainage
Area • Flooding
Overtopped Road
• Road Closed for Construction Sept 15
GRS ABUTMENT • 2’ Reinforced
Soil Foundation• 13’ GRS
Abutment• 4’ Integrated
Approach
EXCAVATION• Unsuitable
material removed and replaced with granular fill
• Layout of delivered materials
REINFORCED FOUNDATION• 2 ft thick
“Burrito” beneath abutment and wings
• Extra layer of fabric on abutment side
LEVELING COURSE• Critical to
maintaining wall alignment
• <0.5” of granular to help level
GRS Abutment• Step 1: Place
block
GRS Abutment• Step 1: Place
block• Step 2: Place
Select Granular Backfill and compact
GRS Abutment• Step 1: Place
block• Step 2: Place
Select Granular Backfill and compact
• Step 3: Place Geosynthetic Fabric
CMU BLOCK WALL• Red line at
berm elevation for scour monitoring
• Hollow vs solid block
• Split face block
LOADING GIRDERS • 4 -Flatbed
Trucks• 2-Cranes
SETTING GIRDERS• No rebar
interference problems
UHPC EQUIPMENT• 3.5 cuft mixers• Shipped to site
in advance
UHPC QUALITY CONTROL• All ingredients
are measured out
• Every batch is tested
UHPC JOINT FORMING• Formed an 1/8”
high• Chimneys at 8’
spacing
UHPC JOINT GRINDING• Grind 1/8’” to
remove voids• Hand grinders
vs bump grinder
VOIDS IN UHPC• Filled with non-
cement grout
WATER TESTING OF JOINTS• Joints were
water tight, no additional sealing required
OPEN TO TRAFFIC• November 19th
Special ThanksSimon Contractors:
• Dale Burkhead –Project Manager• Sid Smith – Project Superintendent
NDOR District 3• Steve Trosper – Project Manager• Monty Koch- Project Inspector
NDOR Bridge• Fouad Jaber – Asst. State Bridge Engineer• Steve Ferguson- Designer
Boone County• Darrel Thorin – Highway Superintendent