Cathodic Protection of Intake Structures

STRUCTURAL TECHNOLOGIES was hired to perform a condition assessment on two cooling water intake structures.

The client wanted to ensure that the structure would continue to perform for another 25+ years. Testing showed spalling, deteriorated concrete and corrosion throughout the structure due to high levels of exposure to chlorides.

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Platform design to allow work to continue underneath structure while pumps and screens were in operation

Cooling water intake structure

Impressed Current Cathodic Protection System Rectifiers Installed

Deteriorated concrete removed, saw cut underside of slab for ICCP ribbon install

Corroded pile ready for stay in place cathodic protection install

Concrete Repair – Sawcut lines for Titanium Ribbon install for Impressed Current Cathodic Protection System

Galvanic cathodic protection installed on piles.

Ribbons Installed

Galvanic cathodic protection installed on piles. Prepping to pour electrolytic grout.

Project Overview

Condition assessment performed to determine the state of the concrete and steel and root cause of the problem
Engineered and installed a work platform to allow repairs while pumps were in operation
Galvanic and Impressed Current Cathodic Protection system installed

STRUCTURAL TECHNOLOGIES was hired to perform a condition assessment on two cooling water intake structures. The client wanted to ensure that the structure would continue to perform for another 25+ years. Testing showed spalling, deteriorated concrete and corrosion throughout the structure due to high levels of exposure to chlorides.

STRUCTURAL TECHNOLOGIES developed a repair solution that included concrete repair, galvanic cathodic protection and impressed cathodic protection. Their exclusive licensee, STRUCTURAL, was contracted to perform the repairs.

A work platform was engineered and installed under the entire structure in order to allow work to be done underneath the structure while the pumps and screens were in operation.

Concrete repairs were completed on the top deck, underside ceiling, piles, beams and wells. Enough concrete needed to be removed to expose the reinforcing bars for cleaning and repair. Galvanic cathodic protection were installed on the piles and pile caps. An Impressed Current Cathodic Protection system was installed on the top deck and side walls.

The project was completed on time and without any safety incidents.