Large span new arch bridge and its construction method

摘要

Girders ( 2 ) , a large span new arch bridge comprising two auxiliary pier ( 12, 13 ) as a central pier ( 11 ) and across the fulcrum of an intermediate fulcrum , the arch axis connecting body ( 3 ) and toward the top convex and further comprising an arch axis bending beams of two arcuate ( 4,5 ) which became , the arch axis connecting body ( 3 ) is placed in the center pier ( 11 ) , the beams at both ends is bent two arch axis , respectively are connected by the end coupled to the inner end of the ( 4,5 ) , the outer end of the two arch axis bending beams ( 4, 5 ) is placed on the two auxiliary pier ( 12, 13 ) each , the two arch axis between the beams ( 4, 5 ) and the girder ( 2 ) bend are connected by a plurality of cables . In addition , construction method of the arch bridge is also disclosed . By using a bi- arch axis , greatly improves the cross-section bending strength of the bridge arch , and reduce the arch cross-section bending moment in the middle fulcrum , small vertical direction of displacement in the lumbar region of the arch , the deformation of the girder is also reduced to balance the force of the entire bridge receives , it is possible to reduce the implementation costs effectively , it is possible to shorten the construction period . [ Selection Figure ] Figure 1