The Study and Application on Girder-Conveying By Track Cable Method for Stiffening Girder of Long-Span Suspension Bridge

摘要

This paper introduces a new construction method for the longitudinal transportation of stiffeningrngirder of long-span suspension bridge, which is called girder-conveying by track cable method, andrnit is an original erection method for stiffening girder of suspension bridges. The method is appliedrnto carry the stiffening girder longitudinally by girder carrier through traction over a flexible tensilerntrack cable, which serves as a load carrying member suspended under the main cable and connectedrnwith suspenders. This new method overcomes the difficulties of traditional method in longitudinalrntransportation of stiffening girder, hoisting load constraint and poor economical efficiency forrnlong-span suspension bridge construction in mountainous areas. By adopting this new method, thernlarge stiffening girder sections can be conveyed and erected under various orographic condition.rnThe method has been adopted in the construction of Aizhai Bridge in Hunan Province, China.