Key technologies for cable system installation of three-tower self-anchored suspension bridge
key technologies in construction of cable system of three-tower self-anchored suspension bridge are described,in-cluding catwalk design,PPWS main cable strand traction erection adjustment,system transformation,suspension cable ten-sion and main cable saddle jacking.Four-span continuous catwalk was designed,strength of load-bearing cable is checked according to catenary line shape.During erection of main cable strand,main cable shape set up according to standard cable strand marking method meets requirements and improves adjustment efficiency of cable strand line shape.Tension equip-ment of system transfer sling and top push frame of sling were designed,factory trial production test was carried out,field application was successful,which solved problems of large tension space angle,large tonnage and large travel of sling.fric-tion coefficient of top push of sling saddle was 0.047 measured in bridge,which verified rationality of top push frame design friction coefficient.
NETL
NSTL
万方数据
