Structure Design and Key Construction Technology for Ballastless Turnout on Bridge

The paper presents a design method of ballastless turnout on bridge,and takes ballastless turnout on No.2 major bridge in southern throat area of Wuhan-Guangzhou PDL Qingyuan station for example,describes the structure design of slab,concrete base convex platform and the slide sections in ballastless turnout,and introduces the key equipment and technologies of construction ballastless turnout on bridge,and five suggestions are put forward for improving the design and construction of ballastless turnout,which are expected to serve as a useful reference for the design and construction of other passenger dedicated line ballastless turnout.