The prestress design is three - direction prestressing force: 27 beams and j15.24 beams are used in the longitudinal direction, and the steel strand is used in the transverse direction of the beam, and the diameter of the steel strand is four strands of jl5.24. Tension control shall be 0.75Ryb. E2 standard for half of North Main Bridge, China Railway Bureau of the nineteenth project construction, according to the characteristics of the bridge with reference to domestic and foreign existing various types of hanging basket, main equipment selection as the diamond truss type cantilever hanging basket. The hanging plate design for railway construction design institute affiliated group corporation, has been applied to domestic Xuanzhun continuous beam construction, but the application in large span bridge construction that is the first time.
Each pier is equipped with 23 cantilever sections: 5*2.5m + 5*3.0m + 5*3.5m + 8*4.0m. Beam length of 4.0m, maximum weight 156 tons. The cross section of the box girder: the width of the top plate is 15.42m, the width of the web is 7.5m, and the height of the beam is changed from 0 8.8m to the 3.0m of the block 23 according to the two parabola.
The construction scheme of rhombic truss type hanging basket: a brief introduction of the main structure of the main bridge of the North Branch bridge of Nanjing Second Yangtze River Bridge is 90+3*l65+90 (m) of the five span prestressed concrete continuous box girder. The main span of 165m is the first in the same type of bridge in china. According to the design requirements, the construction method needs to use cantilever pouring construction technology and then through the closure and system conversion into continuous beam
