construction methods · braddock dam – pittsburgh, pa usa • monongahela river • the lock is...
TRANSCRIPT
![Page 1: Construction Methods · Braddock Dam – Pittsburgh, PA USA • Monongahela River • The lock is 183m by 33.5 m, lift of 13.7 m. • The fixed crest dam built in 1906 was replaced](https://reader034.vdocuments.us/reader034/viewer/2022043003/5f838846d77b02646517e8e9/html5/thumbnails/1.jpg)
PIANC Workshop 13-14th September 2011
Construction Methods
By Dale E. Miller, PE, SE Tetra Tech INCA
United States
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Lock Construction Methods • “Conventional”
– Bypass – Cofferdam
• “Innovative” – Float-in – Lift-in – Trestle Construction – Local Cofferbox – Pneumatic Caisson
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Bypass Construction – Panama Canal
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Conventional Cofferdam Construction
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Conventional Construction Advantages • Utilize Conventional Construction Means &
Methods
• Visual Observation and Measurement of performance and progress
• Visual Observation and Measurement for Quality Control
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Conventional Construction Disadvantages • Additional Costs and Schedule for:
– Real Estate for Bypass, cofferdam, larger laydown and work areas
– Impacts to navigation during construction – Site Access may be more restricted for
material deliveries and construction access – Additional environmental impacts because of:
• Larger construction footprint • More construction operations on-site
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In-The Wet Construction
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Float-In Construction – Braddock ½ Dam
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Lift-In Construction – Olmsted Lower Pier
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In-the-Wet Advantages
• Impacts to Navigation reduced • Fabrication of components can optimize
fabrication site to take advantage of: – Availability of material – Skilled work force – Use of common sites – such as commercial
graving docks and dry docks • Reduced time on site minimizing
environmental and real estate impacts
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In-the-Wet Disadvantages
• Construction tolerances more stringent • Quality control more difficult without direct
visual observation • Survey and measurement more difficult • Underwater operations require specialized
equipment, skills and experience. • Specialized equipment may be required
and expensive.
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Construction Material Improvements
• In-the-Wet construction facilitated by improvements in materials and construction methods: – Improved mix designs with Anti-Wash agents,
low heat mixes, self consolidating and leveling agents
– Improvements in precast connections and alignment devices
– Light-weight fill and aggregates
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Construction Case Histories
• Braddock Dam – Float-in Construction • Olmsted Dam – Heavy Lift Construction • Lith and Almere – Pneumatic Caisson • Charleroi Lock – Cofferbox Construction • IHNC FloodWall – In-the-Wet Trestle
Construction
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Braddock Dam – Pittsburgh, PA USA
• Monongahela River • The lock is 183m by 33.5 m, lift of 13.7 m. • The fixed crest dam built in 1906 was
replaced in 2002 with a new 600-ft float-in flow-control structure with 5 bays for 4 tainter gates and one fixed overflow weir.
• Thanks to Bill Karaffa and USACE – LRP and Sam Yao with Ben C. Gerwick.
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• Two 11,000 tons precast concrete float-in segments
• A unique two-stage cast & launch system for two segments
• Tow the segments 27 miles to the site through two locks
• A unique positioning system to install the float-in segments on site to a tolerance of 50 mm
• A high performance underwater grouting and tremie concrete
WG29 - LOCK INNOVATIONS Innovations in the Braddock Dam Design
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Leetsdale Casting Facility
June 2001
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SEGMENT TRANSPORT
July 26, 2001
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BRADDOCK DAM
• 100-year old fixed crest Dam 2 demolished • New dam fully operational • Dedication ceremony – May 27, 2004 • Project complete – July 2004
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Olmsted Dam, Olmsted, Illinois, USA
• First built in 1929 on the Ohio River • Two 110-foot by 1200-foot locks • The dam will consist of five tainter gates, a
1,400-foot navigable pass wicket gate dam, and a fixed weir.
• New construction should be completed in 2014.
• Thank you to Bill Gilmour, USACE-LRL
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Olmsted Locks & Dam Project Rendering of completed project
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Olmsted Dam Project May 4 2011 Aerial
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Pile Driving Equipment
Features: Template has multiple cylinders to allow it to be
moved in nearly any direction to fit the requirements
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2009 Master / Sheet Pile Installation
As builter, slides over and self centers on master pile and self leveling optical laser plumb shots beam to surface in pipe
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Lifting Frame
Tremie Rebar Template on Cradle being moved by CTE
Cat Barge w/ Lifting Frame
Specialized Tools to Build Olmsted Dam
Gantry w/ Lifting Frame.
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Precast Yard / Shell Work
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Late May 2010 Versus Aug 2010
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Shell Outfitting Work Vertical Lower Pier Shells
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Hookup and Move of SBS1 Dam Station
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Lith and Almere Locks The Netherlands • Lith Lock on The Maas River in The
Netherlands • Constructed in 2001 • 200 m x 18.5 m with depth of 4.7 m • Thank you to Erwin Pechtold with
Rijkswaterstaat for use of the slides
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Caisson method – Lock Lith
• Construction of sand tarp • Construction of lock head with
cutting edge • Excavation below lock floor • Pneumatic submersion of lock head • Fill-up basement with concrete • Finish construction
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Alternatives
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Lock Lith
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Charleroi Locks – Cofferbox Charleroi, Pennsylvania, USA • Monongahela River • Original locks 17 m x 220 m and 17 m x
110 m constructed in 1930’s • New Locks two–220 m x 26 m with 6 m lift • Construction started in 2004 and is being
completed in phases. • Thanks to Steve Stoltz with USACE-LRP
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Original Charleroi Locks
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Charleroi Lock Expansion Plan
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Upper Middle Cofferbox Plan
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Cofferbox with Drilled Shafts & Tremie
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IHNC Storm Surge Barrier, New Orleans, Louisiana, USA • Storm Surge Risk Reduction at Lake
Borgne • Construction to be completed in 2012 • 1.8 mile barrier • 26’ above the water line • 150’ Sector Gate • 150’ Barge Bypass Gate • 56’ Vertical Lift Gate
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Gulf Intracoastal Waterway (GIWW) and Inner Harbor Navigation Canal (IHNC)
MRGO GIWW
Marsh Enhancement
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EL -130’
EL -55’ TIP OF JET GROUT COLUMN
EL -15’ mud line
EL 26’
66” spun cast pile JET GROUT
18” concrete closure piles
12’ concrete cap
protected side flood side
EL -190’
36” steel batter pile
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Precast Caps
17 Feet Long, 96 Tons
306 of 306 Installed –Complete!
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Cast in Place Concrete Section
6 Feet Wide, 339 of 339 Cast – Complete
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Protected Side of Floodwall
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Discussion?