PC Cable-stayed Bridge Tower Beam Synchronous Construction Research

Cable-stayed bridge is a hyperstatic and flexible composite system bridge，whichis composed of tower, girder, cable. With the social development, the construction of thecable-stayed bridge is required more and more higher. Construction progress hasbecome a concerned problem without compromising quality and safety. Tower andbeam synchronous construction compared to the traditional construction,the formershows obvious advantages in the construction schedule. Taking zhongxian changjiangriver bridge in chongqing as the backing, beam synchronization of PC cable-stayedbridge tower construction were studied.Firstly, the construction of cable-stayed bridge is discussed the characteristics andconstruction theory, in order to provide theoretical basis for the subsequent numericalsimulation. Secondly, by the Korean company MIDAS of the finite element softwareMIDAS/CIVIL2011to establish space finite element model of Chongqing ZhongxianYangtze River bridge. The construction process of tower and beam synchronous withthe first tower its two kinds of construction schemes are simulated,and the cable-stayedbridge of beam synchronous construction is carried out a feasibility analysis from thecable force, main girder camber, column beam stress etc. Then, on the basis of theforegoing, On the stability of the tower during the tower and beam synchronousconstruction of different load conditions are analyzed. Finally, from the aspects ofinfluence factors, the control measures, the scope of application of the tower and beamsynchronous construction method is discussed, to ensure the smooth implementation oftower and girder construction.Based on the research of this thesis，which can provide technical support for thetower and beam synchronous construction of PC cable-stayed bridge. At the same time,improve the construction progress and Construction technology of similar bridges haspositive significance.