Research On Construction Technique And Monitoring Control Of Long-span Oblique Curved Through Steel Structure Suspension Arch Bridge

Suspension arch bridge as a kind of new type composite bridge structure system, it concentrates the advantages of suspension bridge and arch bridge, the modelling is beautiful and novel, the carrying capability is explicit and reasonable.This article relies on a long-span oblique curved through steel structure suspension arch bridge, arch Bridges suspension cable construction technique and monitoring control is studied.According to the structure characteristics of arch rib and curved beam oblique crossing, through the comparison among the force transmission path stent system solutions, we use structural analysis software MIDAS/Gen to do total course construction and simulated monitoring on support system; practice proves the stents system is suitable for the construction of suspension arch bridge.The girder steel box, arch steel box manufacturing technology and install welding technology is studied. The girder and the arch rib respectively adopted different welding technique, such as welding by one side shaping by two sides, vertical position welding and over-head position welding. Site monitoring data indicates that welding contraction and welding deformation meet the standards and design requirements, providing accumulating reference data for similar structure welding.Steel arch sling installation and construction drawing is studied from technical scheme and risk, etc. Making the finite element model for each construction stage of tension sling numerical simulation calculation, through various conditions with the theoretical values measured hang cable force the comparative analysis, the construction process has been in hang cable force expected state and the purpose of the monitor has been obtained.