Condition Assessment and Repair of Earthquake and Corrosion Damaged Pre-Cast, Pre-Stressed Concrete Building Support Piles--A Case History

The paper describes a case study which involved the assessment and repair of 10” square, 7000 psi, prestressed, precast concrete support piles for 13 buildings located in Northern California. The preliminary inspection of the piles conducted by our firm revealed significant corrosion related damage to some of the piles to the extent that remedial action to repair the piles was warranted.  An architect, an engineering firm and a contractor was hired by the owner to assist in elaborate inspection work, developing appropriate repair procedures for the deteriorated piles and to conduct needed repairs. The paper describes the methodology developed for inspection, testing and repair procedures for the subject piles.