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

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