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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.
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
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
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.
Wick DrainsWick Drains
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
Wick DrainsWick Drains
Wick Drains – Anchorage
10
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
Craney Island, Portsmouth, VA
Craney Island, APortsmouth, VA
Craney Island, APortsmouth, VA
Craney IslandCraney Island
Craney IslandCraney Island
InstallationInstallation
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.
Installation
Installation
Installation
Installation
Installation
Installation
Installation
I t ll tiInstallation
Installation
Installation
Installation
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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