Comparison of Structural Type and Economics of Super-High Pier for Continuous Rigid Frame Bridge

摘要

Three kinds of structural pier forms–double thin wall pier, combined pier and single pier–were designed for prestressed concrete continuous rigid frame bridge with pier height that overs 100m. Taking an example of Hezhang bridge which is located in Guizhou province, the elastic stability at the largest cantilever stage under action of wind loads were analyzed and concrete volume of pier and cushion cap were calculated. The results indicate that the variable cross-section pier has a better performance of elastic stability than that of uniform pier. Considering the construction difficulty, stability performance and material consumption, recommendations for selecting the structural type of pier with height between 100 m～200 m were given.