Study On Construction Control Method Of Long-span Hybrid Girder Cable-stayed Bridge

Construction control is the key technology of bridge design and construction ofcohesion, the main task of the bridge construction control is the process of bridgeconstruction line, stress, and the completed content for effective adjustment and control,to ensure that in the whole construction process of internal force and deformation of thestructure of the bridge is always in a safe, controlled, and within reasonable bounds, andafter a bridge, the bridge structure into a bridge internal force and linear all meet thedesign requirements, and the ideal target value of the minimum error. In this paper,under construction in yongchuan Yangtze river bridge as the background to carry out thelong span hybrid girder cable-stayed bridge construction control method of study:①Cable force and the elevation control method. The cable-stayed bridge, thetraditional control method of cable force and the elevation control methodimplementation process are introduced briefly, and points out the application of themethod in long span hybrid girder cable-stayed bridge construction control limitations.②The geometric control method. The geometric control method is introducedbriefly, introduces the basic concepts and theoretical basis of the geometric controlmethod; introduces no girder unit main tower, stress is linear, and no procedure forevaluating the stress line are discussed in detail; unstressed cable length calculation ofthe two theories in detail introduction of cable: Theory of parabola and catenary theoryaccurately; described how to use Midas Civil to calculate the geometric constructioncontrol method to control.③The geometric control method of long span hybrid girder cable-stayed bridgeconstruction control of multi object control method based on. The geometric controlmethod of long span hybrid girder cable-stayed bridge construction control of multiobject control method are discussed in detail: the structure stress free geometryparameters as the main control object, mid span steel girder with geometricalparameters as the basic control target, the unstressed cable length as the main controlsection; the side span concrete main beam in mechanics parameter as control target,with main beam stress free alignment as linear main control method, the whole processcontrol method of stress control in cable length, cable force and double control as.④In Yongchuan Yangtze River bridge as the basis, the geometric control methodof long span hybrid girder cable-stayed bridge concrete implementation process multi-objective control method of construction control are introduced in detail, and theimplementation of the monitoring results of the project are evaluated.⑤Finally, in the two key problems in the construction monitoring (side spanconcrete support rigidity, bearing friction resistance and side span concrete liningfriction problem) has carried on the simple discussion.Hybrid girder cable-stayed bridge, beautiful appearance, good crossing ability andstrong adaptability of terrain, equal span steel box girder cable is more economical thanthe full bridge,"realize the harmony and unity of economic, security, use, beautiful",bridge in our country under the background of great development, has a broadapplication prospect. This paper has great reference value to the construction control oflong span hybrid girder cable-stayed bridge in the future.