Rehabilitation of Hyperbolic Cooling Towers at Electric Generating Station

摘要

Two concrete cooling towers serving a generating station exhibited concrete deterioration, steel corrosion, and water leakage. These towers needed major repairs that could be done only during scheduled outages. Detailed structural analysis helped determine the maximum size, relative location, and sequencmg of repair areas to ensure stability during repairs. Materials were chosen to withstand conditions within the towers. Structural engineers and construction material consultants took part in condition evaluation, repair design, and construction quality assurance. Repair crews removed deteriorated concrete and used specialty shotcrete materials for structural restoration. Durability enhancements included a waterproofing coating on the interior. They sealed tower surfaces and sealed cracks with epoxy. Meticulous quality control testing and inspection helped ensure the project's success. After more than 15 years of continuous service, the repaired towers show no evidence of on-going deterioration or structural distress.