ASYMMETRIC INSTALLATION CONSTRUCTION METHOD FOR STRADDLE-TYPE LIGHT RAIL SPECIAL STEEL BOX GIRDER EXTRADOSED BRIDGE

摘要

Disclosed in the present invention is an asymmetric installation construction method for a straddle-type light rail special steel box girder extradosed bridge. Steel box girders of the whole bridge are divided into several beam sections, which are then asymmetrically installed according to the hoisting sequence of side span section D1→middle span section C1→side span section D2→middle span C2→...side span section Dn→side span section Dn+2→side span joint section→...middle span section Cn→middle span joint section H. The method of the present invention can meet the waterway requirements to the greatest extent, without the need of providing steel pipe supports at the middle span sections.