DESIGN AND TESTING OF LARGE DIAMETER CONCRETE CYLINDRICAL PILES: A CASE HISORY

摘要

A case history involving the design and construction of the pier foundations for a fixed high level bridge over Nacote creek is presented. The bridge is supported on four piers with each pier being supported on four pre-stressed open-end concrete cylindrical piles of 1.37 m diameter and 165 mm wall thickness. Design concepts for cylindrical piles are outlined, with emphasis on modifications applied to Nordlund method to suit large diameter open-end driven piles. Static load test results performed on one cylindrical pile are presented. The adequacy of the design method is evaluated based on the static load test, as well as the PDA and CAPWAP data. The paper also discusses the installation sequence of the cylindrical piles. Finally, recommendations regarding design, construction, and dynamic testing of cylindrical piles are presented.