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Home Blog Duluth Seawall Project – Case Study in Underwater BoxBolt Usage


Monday, January 17, 2011

Duluth Seawall Project – Case Study in Underwater BoxBolt Usage

Duluth Sea Port is the world’s largest inland port and one of the most important ports on the Great Lakes [ref]. The Duluth Sea Port has an aging sea wall that forms a barrier between the the port and Lake Superior. The port has embarked upon a renewal project which will place epoxied steel plates on the corroding corrugated sea wall.

The challenge of this project was of course how to attach the expoxied panels to the old sea wall. The solution: BoxBolt blind bolts. The BoxBolt allows a connection to be secured to a hollow opening from one side. This was exactly what was needed to accomplish the attachment of the new sea wall.

Using BoxBolt the panels could be attached to the old sea wall by drilling a hole in the panel, a hole in the wall, pushing the bolt into the hole and tightening the bolt down. See the pictures below for a look at the project.

Team members examine the corroded sea wall where the panels will be installed.

A new panel sits on the dock pre-drilled and ready to be installed. These panels are lowered by crane into the working area and then secured to the existing sea wall with BoxBolts.

The galvanised BoxBolts used to attach the sea wall are quite large. The housing is held in place by a wrench while the bolt is turned, as the bolt turns the nut on the end splays the metal flanges to tighten the panel against the wall.

A worker inside the cofferdam who is tightening down the BoxBolts that are holding the panels to the sea wall.

A freshly attached BoxBolt holding the epoxied panel to the old sea wall.

A completed section of the sea wall. The cofferdam removed, the wall is finished and ready to come into contact with the corrosive elements!

Learn More about BoxBolts

Click here to learn more about the BoxBolt expansion anchor and how it can help you on your next project.

Posted on 01/17 at 06:35 PM

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