UNDERWATER PILE INSTALLATION: The MFG-CP pile jackets are lightweight and relatively easy to install; featuring a slip-joint/ tongue-and-groove closure configuration which makes underwater assembly easy for divers. The FRP pile jackets also offered a flexible, peal-away liner design seam and a resin bond finish to the jacket - eliminating the need to sand-blast for chemical adhesion to work in conjunction with the lightweight stone concrete pour.
Due to the 20' extension of the jackets in deeper water, the jackets utilized a bell-and-spigot connection. This saves time in installation, allows for stacking and adds more strength structurally for concrete placement during the pumping operation.
Accoding to Trevcon Project Manager Ron Treveloni Jr., "Installation began by using steel reinforcing around the existing pile which was measured to fit the FRP form. Then 3-4 dock builders dropped each form in the water and set it on a floating platform to each pile location. A single diver then installs each form with the assistance of two dock builders; fastening each pile's tongue-and-groove configuration in place."
Treveloni noted the unique concrete pour processes stating, "We utilized a concrete pump at the bulkhead since no concrete trucks were allowed on the pier. Hard pipe extending about the length of a football field from the land pumped to a hose on the pier, then down to the diver at the base of the pile. The concrete pumping pushed from the bottom up at 3 yards per pile. There were two pumping ports on each pile-one on the bottom and one in middle. Each pile was poured in two lifts, taking about one-half hour per pile."
According to Treveloni, they utilized a 3/8" lightweight stone concrete noting, "It's a tricky concrete but it was mandatory because the additional weight could pose potential structural damage to the pier."
FRP PILE JACKET CONCLUSION: With the growing need for strengthening waterfront infrastructures including; pile deterioration due to ice, marine borers, floating debris, chemical pollution, oils, acids, water and tidal pumping, etc. there is an essential charge for alternative, cost-effective restoration solutions.
Combined with the correct epoxy/concrete bond, the FRP repair jacket forms surrounding existing piles (timber/steel/concrete) can efficiently refurbish (vs. replacing) the existing pile- thus, strengthening them to their original or better strength. In addition to pile replacement savings, the easy-to-use MFG-CP jacket installation also accommodates the efficiency of requiring no pier, terminal, or facility shut-downs.
MFG-CP offers standard diameters available in 12-36" and can accommodate custom sizes for unique applications. Lengths are produced to specifications and ultraviolet resistance accommodations are available.
"MFG has been our choice of FRP pile jacket forms since we started this type of work. Not only have they given us quality products but their service and the ability to meet delivery dates is outstanding." - Ron Treveloni Jr. / Trevcon Project Manager
MFG-CP / CORPORATE PROFILE: MFG Construction Products Company, formed in 1962 and a charter member of the World of Concrete, manufactures a complete range of one-piece round column forms (RCFs), dome and pan forms for one-way and two-way joist slab floors, and custom forms used in cast-in-place concrete construction applications. Made of fiberglass-reinforced thermo-set composites, MFG concrete forms can significantly reduce finishing costs and are fully re-usable. Comprised of twelve key entities in eight states Molded Fiber Glass Companies (EST: 1948) has been a pioneering force in optimizing resins and fiber reinforced polymer (FRP) materials and continues to build strength through focused diversity in providing superior composite material solutions worldwide.
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