06 Structural Shtocrete Specifications
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Transcript of 06 Structural Shtocrete Specifications
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Structural Shotcrete Specifications
By,
Dudley R. (Rusty) Morgan
AMEC Earth & Environmental,
a division of AMEC Americas Limited
and
Larry Totten
Johnson Western Gunite Company
San Leando, California, USA
SHOTCRETE FOR AFRICA CONFERENCE
Misty Hills Conference Centre
South Africa
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Subject of Presentation
Review of structural shotcrete specifications
Shotcrete construction of:
In-ground parking structure, Calgary Alberta
Seismic retrofit of heritage masonry structure, Vancouver, British
Columbia
Walls and pilasters in 50 storey hotel, Vancouver, BC Whistler 2010 Olympics Bobsleigh/Luge Track
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In-Ground Parking Structure, Calgary, Alberta
20 m deep soldier pile/timber lagging stressed channels tie-back evacuation
Cloth/bentonite waterproofing membrane system
Reinforced shotcrete perimeter walls
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Calgary Parking Structure
Preconstruction mock-up of
typical structural steel wall
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Calgary Parking Structure
Shooting preconstruction mock-up
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Calgary Parking Structure
Finishing pre-construction mock-up
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Calgary Parking Structure
Core extracted from pre-construction mock-up for core grading to
prequalify shotcrete nozzlman
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Calgary Parking Structure
Hoarding installed for cold weather shotcreting
Shotcreting continued at ambient temperatures
as low as -30oC
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Calgary Parking Structure
Structural reinforcing steel erected ready for shooting
Note hoarding enclosure for cold-weather shotcreting
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Calgary Parking Structure
Start-up of shooting of structural walls using bench-gunning technique
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Calgary Parking Structure
Bench-gunning second lift
Note blowpipe
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Calgary Parking Structure
Upper lift finished to line and grade
Flash-shooting lower lift to shooting wires, ready for
cutting, screeding and finishing
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Calgary Parking Structure
Trimming shotcrete with
cutting rod to shooting
wires
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Calgary Parking Structure
Finished structural shotcrete wall
Finisher is cleaning top of wall and rebar to accept
cast concrete suspended slab that will rest onstructural shotcrete wall
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Calgary Parking Structure
Four levels of structural shotcrete walls completed
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Calgary Parking Structure
Close-up view of four levels of structural shotcrete walls
Column conventional cast-in-place formed concrete
(too heavily reinforced for shotcrete construction)
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Calgary Parking Structure
Core extracted from shotcrete wall for compressive
strength testing
Note dense quality of shotcrete free of voids or defects
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Calgary Parking Structure
Structural shotcrete walls approximately 50%
completed
S i i R fi f H i M S
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Seismic Retrofit of Heritage Masonry Structure
Vancouver, BC
Faade of South Building
S i i R t fit f H it M St t
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Seismic Retrofit of Heritage Masonry Structure
Vancouver, BC
Faade of North Building
S i i R t fit f H it M St t
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Seismic Retrofit of Heritage Masonry Structure
Vancouver, BC
Pre-construction shooting of mock-up of column/wall
connection, to prequalify shotcrete nozzleman for
project
S i i R t fit f H it M St t
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Seismic Retrofit of Heritage Masonry Structure
Vancouver, BC
Completion of shooting of
pre-construction mock-up of
column/wall connection
Seismic Retrofit of Heritage Masonry Structure
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Seismic Retrofit of Heritage Masonry Structure
Vancouver, BC
View of back stripped face of mock-up column/wall
connection
Note complete lack of any voids, shadows or other defects
Seismic Retrofit of Heritage Masonry Structure
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Seismic Retrofit of Heritage Masonry Structure
Vancouver, BC
View of locations of cores
to be extracted for core
grading in pre-constructionmock-up of wall/column
connection
Seismic Retrofit of Heritage Masonry Structure
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Seismic Retrofit of Heritage Masonry Structure
Vancouver, BC
View of 5 cores extracted at locations of reinforcing
steel from wall/column connection mock-up
All cores were better than Grade 2
Seismic Retrofit of Heritage Masonry Structure
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Seismic Retrofit of Heritage Masonry Structure
Vancouver, BC
Interior of North building,
gutted and braced
Reinforcing steel installedin exterior walls, pilasters
and columns, ready for
shotcreting
Seismic Retrofit of Heritage Masonry Structure
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Seismic Retrofit of Heritage Masonry Structure
Vancouver, BC
L-bar anchors grouted into exterior stone masonry
walls
Seismic Retrofit of Heritage Masonry Structure
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Seismic Retrofit of Heritage Masonry Structure
Vancouver, BC
Double mat of rebar installed on exterior masonrywall, ready for shotcreting
Seismic Retrofit of Heritage Masonry Structure
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Seismic Retrofit of Heritage Masonry Structure
Vancouver, BC
Nozzlman bench gun shooting 450 mm thick structural
shotcrete wall
Basement shotcrete left in natural shotcrete finish(since basement backfilled)
Seismic Retrofit of Heritage Masonry Structure
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Seismic Retrofit of Heritage Masonry Structure
Vancouver, BC
Bench gun shooting 1m deep pilaster through 4 layers
of rebar
Note nozzle inserted through first mat of rebar
Seismic Retrofit of Heritage Masonry Structure
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Seismic Retrofit of Heritage Masonry Structure
Vancouver, BC
View of above-grade perimeter wall being finished to
line and grade
Note shooting wire
Heavily Reinforced Structural Shotcrete Walls and
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Heavily Reinforced Structural Shotcrete Walls and
Pilaster for New 50 Storey Hotel, Vancouver, BC
Preconstruction mock-p of pilaster and wall
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Heavily Reinforced Pilaster Mock-up with Two Sided Form
Note shooting wire
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Shooting Wall Mock-up with Wet-Mix Shotcrete
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Shooting Pilaster Mock-up
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Shooting Pilaster Mock-up
Note use of blow-pipe to control rebound
Use of Pencil Vibrator to Help Consolidate
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p
Shotcrete in Wall Mock-up
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Trimming Shotcrete to Line and Grade with Cutting Rod
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Finishing Shotcrete with Rotary Disc
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Final Finishing of Shotcrete
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Diamond Saw Cutting Wall and Pilaster Mock-ups
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Saw Cut Wall Section
C f S S
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Close-up of Saw-cut Wall Section
S C t Pil t S ti
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Saw-Cut Pilaster Section
Note dense shotcrete
Cl f S C t Pil t S ti
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Close-up of Saw-Cut Pilaster Section
Note excellent shotcrete consolidation around dense
reinforcing steel
C E t t d f Pil t
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Cores Extracted from Pilaster
Note excellent consolidation of shotcrete
Cores E tracted from Wall Section
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Cores Extracted from Wall Section
Note excellent consolidation of shotcrete around dense
reinforcing steel
Whistler 2010 Olympics Bobsleigh/Luge Track
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Whistler 2010 Olympics - Bobsleigh/Luge Track
Installation of Rebar and Cooling Pipes in Track
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Installation of Rebar and Cooling Pipes in Track
Stay Form Expanded Metal Lath
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Stay-Form Expanded Metal Lath
Correct and Incorrect Method of
Encasing Reinforcing Bars with Shotcrete
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Encasing Reinforcing Bars with Shotcrete
Typical Reinforcing and Cooling Pipe Detail
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Typical Reinforcing and Cooling Pipe Detail
Note use of expanded metal lath in first sections of track
Note Use of Diagonal Spacer Bar
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Note Use of Diagonal Spacer Bar
Note Congestion at Cooling Pipe Header
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Note Congestion at Cooling Pipe Header
Track Ready for Shooting
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Track Ready for Shooting
Note use of temporary plastic screed bars
Shotcreted and Finished Section of Track
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Shotcreted and Finished Section of Track
Void and Coarse Aggregate
Trapped Behind Expanded Metal Lath
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Trapped Behind Expanded Metal Lath
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Void at Congested Area of Cooling Pipe Baffle
and Diagonal Spacer Bar, After Hydro-blasting
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g p , y g
Void at Cooling Pipe Spacer Bar After Hydro-blasting
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g p p y g
Construction of Second Mock-up Using Stay-Form
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p g y
Start of Shotcreting Shoot Cove
Between Wall/Floor First
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Shoot Floor Next
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Consolidate Shotcrete in
Cove/Floor with Immersion Vibrator
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Fully Consolidated Shotcrete In Cove/Wall
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Blow out Rebound/Overspray with Blow-pipe
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Shoot First Lift on Wall
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Back Face of Wall
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Note lack of voids behind stay-form
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Header Form Stripped off Still-Fresh Shotcrete
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Finish Coat Applied to Flush with Screed Pipes
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Screeding Shotcrete to Temporary Screed Pipes
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Finishing of Shotcrete After Screed Pipe Removal
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Broom Texture Finish (to aid ice adhesion)
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Newly Finished Shotcrete Surface
being Moist Cured by Misting
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Misting with Water Pressure Sprayer
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Cut-out Section from Second Mock-up
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Note good consolidation
around rebar, cooling
pipes and stay-form
Close-up View of Cut-out from Second Mock-up
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Note good consolidation
of shotcrete
Completed section of Track
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Whistler 2010 Winter Olympics
Bobsleigh/Luge Track Finish Zone
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Whistler 2010 Winter Olympics
Bobsleigh/Luge Track
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Inspection of iced track prior to first run by Canadian WorldChampion Bobsledders Pierre Lueders and Justin Kripps
Whistler 2010 Winter Olympics
Bobsleigh/Luge Track
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Canadian bobsledders Pierre Lueders, pilot and Justin Krippspush off their two-man bobsled from a lower start for their first
run down The Whistler Sliding Centre track
Whistler 2010 Winter Olympics
Bobsleigh/Luge Track
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Start of first run on track
Photo Courtesy VANOC/ Photos: David McColm
Whistler 2010 Winter Olympics
Bobsleigh/Luge Track
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First run on track
Photo Courtesy VANOC/ Photos: David McColm
Whistler 2010 Winter Olympics
Bobsleigh/Luge Track
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Air time at finish
Whistler 2010 Winter Olympics
Bobsleigh/Luge Track
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