MARINE STRUCTURE - CMI Sheet Piling

MARINE STRUCTURE
Lincoln Harbor Pier
BACKGROUND
Lincoln Harbor is a large, upscale, mixed-use development
located on the Hudson River near the Lincoln Tunnel. It is
comprised of multiple piers, a marina and two residential and
commercial buildings. The pier sections are supported by a
system of hundreds of wooden piles. Over time, the structural
integrity of the wooden pile system had been compromised
due to damage from marine borer attacks. This type of “ship
worm” damage is not uncommon in the NY/NJ waters. Recent
environmental regulations have improved the water quality
of the Hudson River so much so that marine organisms,
especially those that eat wood, have begun to thrive. Settling
and cracking of concrete structures including a parking lot was
further evidence of the severe structural problem.
PROJECT SCOPE
The Hartz Group, which is one of the largest privately held
real estate owners in the United States, retained the McLaren
Engineering Group to evaluate the site. McLaren thoroughly
analyzed loading capacities, soil conditions, wooden pile
conditions, and damage to the concrete structure. After the
study, it was determined the best remedy would be to use
corrugated sheet piling driven around the entire perimeter of
the piers. Then, underneath the piers, water would be pumped
out and engineered fill would be pumped in to stabilize the
structures. Resurfacing the concrete pier with composite
sheet pile was the most environmentally friendly solution to
protect the pier from scour.
PERFORMANCE
The use of steel sheet piling was disallowed by the New Jersey
Department of Environmental Protection. Due to maintenance
(sandblasting) and pollutant (epoxy coatings) concerns the
NJDEP permitted only PVC or FRP sheet piling. To meet their
engineered specifications, McLaren required UltraComposite™
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50 FRP to be installed. UC 50 is a 36” wide “box” shaped
profile which greatly reduced the amount of interlocks on
the face of the wall. The UC 50 is the widest synthetic sheet
piling produced in the world and can be manufactured to any
transportable length. The reduced interlocks and the sufficient
effective permeability of UC 50 allowed for installation without
costly he engineer’s solution would need to support large
equipment, vehicles and heavy containers in the day to day
operations of the port. The design included a 1300 linear foot
cut-off wall made of 30 foot long UltraComposite™ FRP sheets.
UltraComposite™ products are corrosion-resistant and do not
interlock sealants. Given the complex nature of FRP products
and the difficulty in manufacturing them to their design
specifications, quality control is a critical component that
ultimately determines long-term product performance. Quality
at this level can only be delivered when the most stringent
steps are followed using an ISO certified manufacturing
process.
CONSTRUCTION
Trevcon Construction, a large local firm familiar with similar
type projects drove the sheet piling. Two methods were
used to drive the sheets depending on the position at the
job site. First, and most often, a large excavator with bucket
attachment. Secondly, a crane supported ICE vibratory hammer
model 14. Average production was 100 feet per day. The sheets
varied from 15’ to 30’ long and were driven into various soil
conditions including silty sand, moist medium firm to dense
clays with some gravels.
WALL SPECIFICATION
UC 50
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Date:
May 2010
Contractor:
Trevcon Construction Co.
Owner:
The Hartz Group
Engineers:
McLaren Engineering Group
Depth
22ft.
7m
Length
3,250ft.
991m
Wall Area
90,000ft2
8361m2
The use of composite sheet piling was allowed by the New
Jersey Department of Environmental Protection.
UC 50 is a 36” wide “box” profile which greatly reduced the
amount of interlocks on the face of the wall.
The sheets varied from 15’ to 30’ long and were driven into
various soil conditions at an average of 100 feet per day.
Lincoln Harbor is comprised of multiple piers, a marina and
two residential and commercial buildings.
Crane Materials International (CMI) manufactures innovative
products which provide value added sustainable solutions for the
construction and engineering communities.
Physical properties are defined by ASTM testing standards, The Aluminum Association Design Manual, The Naval Facilities Design Manual DM 7.2, and The US Army Corps of Engineers General Design Guide: PVC
Sheet Pile and/or standard engineering practice. The values shown are nominal and may vary. The information found in this document is believed to be true and accurate. No warranties of any kind are made
as to the suitability of any CMI product for particular applications or the results obtained there from. Crane Materials International is a Crane Building Products® company. CRANE MATERIALS INTERNATIONAL
products are covered by one or more of the following U.S. Patents and International Patents: 4,674,921; 4,690,588; 5,292,208; 5,145,287; 6,000,883; 6,033,155;6,053,666; D420,154; 6,575,667; 7,059,807;
7,056,066; 7,025,539; 7,393,482; 5,503,503; 5,803,672; 6,231,271; 1,245,061CA; 7,914,237 and other patents pending. ©2005-2015 Crane Materials International. All Rights Reserved.
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