Gas Transmission Pipeline Projects
October 6, 2016
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Tank Foundation

After a different contractor had tried and failed, PPI repaired the foundation for a product tank with differential settlement of at least 18 inches.

A fter the previous contractor had failed to remediate the tank, the client was faced with a completely unusable tank and only two choices: completely demolish the existing tank and foundation and build a new tank in its place or leave the unusable tank out of service, taking up valuable terminal space.

The client knew that PPI provides an effective ground improvement system. Having worked with us successfully on several projects, the client contacted PPI to provide a solution.

After investigating the existing conditions of the foundation and obtaining the necessary geotechnical investigation, we were able to design a new foundation system for the client with the tank in place.

PPI removed the tank bottom, lifted the 900,000-lb tank and supported it in place with sufficient room to work under the tank. PPI installed the ground improvement system beneath the tank, demolished and replaced approximately a third of the tank concrete ringwall, re-leveled the remaining section of the concrete ringwall, and lowered the tank back in place.

The tank is now back in service-producing revenue for the client for a fraction of the cost of demolishing and replacing the entire tank and foundation.

Tank Foundation Correction

Underneath lifted tank