Construction Control And Foundation Settlement Analysis Of Minsheng Road Cable Stayed Bridge

Cable-stayed bridge has made most great progress in the modern bridge engineering and has become one of the most competitive bridge types.Especially the last ten years,the span of cable-stayed bridge is becoming special larger.Sutong Changjian long bridge has been constructed,which main span is 1088 metres,becomes the longest bridge in the world.Cable-stayed bridge has not only a beautiful shape,but also a good mechanical function, its main advantages consist that the function of cable is not only the stretch support,more importantly,it can forwardly bring cable force to bear to balance the external load through the jack.The cable force can be adjusted,through the adjustment of cable force,structure's internal force can come out in reason.Then the adjustment of cable force become a very important problem in cable-stayed bridge design and construction control work.The main content as follows:Firstly,the characteristics of construction computation for Cable-stayed bridge and the methods of construction control are introduced in the paper according to the actual characteristics of Minsheng Road bridge.It is gave the construction of how to make a model to imitate the construction process of bridge.A FEM model is established.Based on the model,the analog computation for Minsheng Road bridge,which can do all kinds of nonlinear analysis.Especially gives a influence matrix method of making the last cable force,it takes two times to adopt the cable force in construction process.And then fix the elevation of beam in the construction process.Giving a introduction about the principle and goal of construction control.And especially introduces the methods for cable force control,main beam's elevation control,main beam's stress control and measures for them are also introduced.Calculating the settlement of main bridge,gives the analysis of settlement with a FEM model.And analysis the different influences of different settlement.Reasonable method is given to adopt the settlement.Making sure the bridge is safe of during the process.Lastly,according the whole process of construction control,some conclusions are drawn.