Lagoon City Pile Jacket Project

LAGOON CITY BRIDGE REPAIR PROJECT JOB DETAILS: MARKET: Marine PRODUCT: • Five Star Marine Fiberglass Pile Jackets • High Flow Pile Jacket Epoxy Grout LPL-HF

Pinetree Court Bridge

“Burst” Timber Pile

Pile Jackets Installed & Grouted

Finished Piles with New Retaining Structure

DATE: August 2022 LOCATION: Lagoon City, Ontario SUBSTRATE: Timber Piles

Lagoon City was the brainchild of Hungarian Engineer Andrew Zsolt and is the oldest canal community in Ontario. Designed in the 1960’s and constructed in the 1970’s it is centred on the Trent Severn Waterway. Lagoon City is located on the shores of Lake Simcoe in Ontario, this “Venice” of Ontario has over 16 km of canals.

To provide access to homes and businesses, small two-lane clear span timber bridges were constructed over the canals, these allow small watercraft to pass underneath, while still permitting vehicular traffic to flow around the community.

These bridges consist of 10 timber piles supporting two large timber beams, a timber deck with concrete wearing surface and ornate timber parapets, each one with a different theme.

Four Brothers Construction were tasked with the restoration of the supporting piles and associated retaining walls on the bridge providing access to Pinetree Court. Due to the extensive nature of the project, steel curtain wall dams were driven in either side of the bridge and the structure was dewatered, this allowed full access to all 10 piles and the retaining walls.

On initial inspection, extensive damage was evident on two of the original piles. The Project Engineer devised a repair and upgrading program for the piles, consisting of a Fiberglass Pile Jacket with an Epoxy Infill. The timber piles were also supplemented with additional fiberglass reinforcement, placed vertically around each pile, prior to installing the jackets.

www.stonhard.ca | 800.263.3112

LAGOON CITY BRIDGE REPAIR PROJECT

Pre-Manufactured Fiberglass Pile Jacket

Chamfer at Top Edge of Pile

Fiberglass Pile jackets have many added benefits, including an unobtrusive “natural look”, improved impact and abrasion resistance from ice & floating debris and when coupled with epoxy infill materials, a very slender profile, minimizing the additional size of the pile to help maintain access for marine traffic.

Piles were powerwashed and structurally repaired to allow the pile jackets to be installed, additional fiberglass reinforcement was added and the jackets placed around the structure. One inch spacers were introduced to help centre the new pile jacket on the pile being repaired.

The jackets were then sealed with an underwater adhesive and mechanically fixed while the adhesive cured to create a liquid tight form for the infill. Pile jackets are typically left in place, but could be removed if required.

The bottom of the jackets were embedded into the canal bed and then sealed prior to grouting. To resist the hydrostatic loading imposed by the epoxy grout, straps are placed around the jackets until the grout is sufficiently cured.

Once fully grouted, a 45 degree chamfer was introduced at the top of the pile to ensure any water would be shed away from the protruding timber pile.

To prevent reoccurrence of the damage to the piles due to frost heave in the retaining walls, the original concrete walls were removed and replaced with new timber structures, spaced well away from the piles.

High Flow Pile Jacket Epoxy Grout LPL-HF is specifically designed for underwater grouting and marine pile encapsulation and is formulated to remove harmful chemicals, making it safe for marine and aquatic applications. It installs with fast-fill rates, is non-segregating, and does not contain toxic Nonylphenol.

www.stonhard.ca | 800.263.3112

09/22