Long Span Arch Bridge Cable System Together By Force And The Single Rib Long Stability Analysis

In recent years,due to the reinforced concrete box arch bridge has stiffness,material Province,good durability,maintenance,low maintenance costs,attractive appearance,and many other advantages,gradually become a form of highway bridge on the bridge structure is widely used,especially for mountain highway,this is particularly reflected.Currently,one such bridge construction used the more common method is to cable hoisting construction method,cable hoisting method for complex terrain has a strong ability to adapt,some large machinery difficult to approach the valley to be prefabricated arch hoisting construction,piecewise connected integrally formed,eventually forming the main arch.The method has the construction process is simple,low cost.In this paper,the actual construction Diaoyutai concrete bridge for the bridge span,lifting large weight,narrow space construction site,hoisting construction risk,to ensure that the cable hoisting system can safely and smoothly hoisting construction,the following main elements:1?To calculate the cable system.Calculate the main cable,hoisting rope,lifting traction rope in various control conditions of the forces,the use of midas / civil finite element model arch arch box box lifting process during the installation phase of Cable Force order obtained in the tower on both sides of the unbalanced load.2?To review the cable hoisting system anchor.Ground anchor for anti-pull stability calculations.3?The Lifting tower strenth and stability of several conditions were calculated.Use midas / civil finite element model of the tower,checking tower strength,the tower stability analysis in the respective control lifting conditions,the verification of the tower in the lifting process safety.4?Through trial and hanging test on cable hoisting system's main cable force,the tower displacement,real-time observation tower that is the key force bar stress,displacement of the anchor,to ensure safety in the tower of the lifting process.5?Discusses two lower ribs collapse during the installation process stability,ribbed arch collapses after wind loads,lateral wind effect on the stability of the cable?...