Technology And Application Of Construction Control In Prestressed Concrete Continuous Beam Bridge

Prestressed concrete continuous beam bridge gets unprecedented development for its special advantage, such as convenient construction, economical cost, reasonable bearing, comfortable travelling crane, and the continuous development of cantilever casting construction technology and equipment. At present, in the bridge span with 40 to 150 meters, prestressed concrete continuous beam bridge takes up a dominant status. The larger of continuous beam bridge span, the more difficulty of construction. The construction control of large span prestressed concrete continuous beam bridge is a important tache to ensure construction quality and safe. It's also a important measure to ensure completion state according with design demand.The task for bridge construction supervise is to implement supervise to bridge construction process. In order to make sure linear completion state and completion state structure internal force according with design demand. The stress, distortion and linear control of bridge have the same importance, so it's necessary to control completely to make construction go on wheels, as to reach design state.Through using construction theory and method, combineing with practical situation of San Zhi Xiang Bridge in Xin Guang Celerity Road in the article, it has done the following work:(1) Bring forward accumulative total addition method, sum up calculation formula of the form erected with elevation in applied engineering: y_i=y_设-f_成桥+f'_i-1, and use the calculation model of bridge deadweight to equal load mode effect on the deadweight zeroth rigidity shankt, it can forecast with bridge form erected with elevation.(2) According to structure analysis, construction, inspecting, forecast, identifying, adjustment, warning, cycle characteristic of construction, it has established structure organization, set down construction control flow and solve precept, carried through to bridge stress, distortion, linear theory structure analysis and construction control technology in system.(3) Combines with practical measured data during construction process to identify and judge parameter, and then use Gray theory (1,1) model to revise construction elevation.(4) Compare with practical measured stress, distortion and linear with theory calculation, and analyse with the error.From control conclusion, it can see that construction control technology has made better effect in the application of San Zhi Xiang Bridge construction.