THE REHABILITATION OF A VIADUCT IN PANYU DISTRICT OF GUANGZHOU CITY BY ADDITIONAL STEEL TRANSVERSE BEAM

The cracks on the box girder surface of a viaduct in Panyu District of Guangzhou City are found,whose reason has been inferred as the deficiency of torsion resistance.In this paper,three rehabilitation methods,additional prestressing concrete transverse beam,additional concrete joist beam and additional steel transverse beam,have been proposed,which advantages and disadvantages have been discussed and contrasted.At last the method of additional steel transverse beam is adopted to improved the torsion resistance,based on those facts of construction convenience,project cost,rehabilitation effectiveness and configuration.The details of rehabilitation design have been exhaustively illustrated.The rehabilitated bridge with beautiful appearance obtains good results.This case can be regarded as a valuable reference for seminar engineering design.