Prefabricated Vertical Drain Installation at Craney …...Outline • Introduction to Prefabricated...
Transcript of Prefabricated Vertical Drain Installation at Craney …...Outline • Introduction to Prefabricated...
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Prefabricated Vertical Drain Installation at Craney Island
Eastward Expansion Eastward Expansion Portsmouth,VA,
Presented by Aaron D Goldberg PE D GEPresented by Aaron D. Goldberg, PE, D.GEwith U.S. Wick Drain, Inc.
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OutlineOutline• Introduction to Prefabricated Vertical Drains
(Wick Drain)• Introduction to Craney Island ProjectIntroduction to Craney Island Project• Over-water Installation of Wick Drains at
Craney IslandCraney Island
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Aknowledgementsow edge e s
• Great Lakes Dredge & Dock• Magann• U S Wick Drain• U.S. Wick Drain• Craney Island Design Partners –
M ff t & Ni h l d F Atl tiMoffat & Nichol and Fugro Atlantic
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Wick DrainsWick Drains• Plastic band-shaped drains installed with
specialized stichers• Accelerate dissipation of pore water pressures Accelerate dissipation of pore water pressures
in clay and silt. Settlement and Strength.• Replaced sand and gravel drains• Replaced sand and gravel drains.• Typical dimensions are 4-in. wide by 1/8-inch
thi k thick.
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Wick DrainsWick Drains
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Wick drains reduce the distance that excess water particles have to Wick drains reduce the distance that excess water particles have to travel to reach a draining layertravel to reach a draining layer
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Wick DrainsWick Drains
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Wick Drains – Anchorage
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Craney IslandCraney Island• Long term development joint with USACE &
VPA• Settlement and resulting Strength increaseSettlement and resulting Strength increase• Wick Drain Material Specification and Over-
water installationwater installation
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Craney Island, Portsmouth, VA
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Craney Island, APortsmouth, VA
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Craney Island, APortsmouth, VA
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Craney IslandCraney Island
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Craney IslandCraney Island
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InstallationInstallation
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InstallationInstallationOver-water installation from barge. Holes were made and cased through the barge for installation.Hitachi 800 and 850 excavator mounted wick drain stictchersdrain stictchersBarge was anchored and winched to move into positionposition.
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Installation
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Installation
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Installation
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Installation
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Installation
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Installation
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Installation
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I t ll tiInstallation
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Installation
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Installation
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Installation
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Additional ResourcesIra Brotman with Moffatt & Nichol presentation on Thursday morning about the dredging on Thursday morning about the dredging aspects. Paper published for annual DFI meeting last week on the wick drainsmeeting last week on the wick drains.
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