Construction Control Of Gonghe Cable-Stayed Bridge

With the rapid development of our country's communication, the need of construction of large span bridge increases rapidly. The cable-stayed large bridge has been used as one of the most popular type because of its advantages such as: economization, beauty shape etc.Cantilever placing cast method and cantilever placing installation method are often used in the cable-stayed bridge construction. The construction space for Gonghe cable-stayed bridge is not enough because it crosses over the main Hada electric railway which is under reconstruction. Based on above mentioned reasons and in order to get good use of the limited construction space, movable framework construction method is used.Some problems of this construction method are introduced and measures on how to solve them are put forward in this paper. Taking the sucessful control experiences in previous cable-stayed bridge construction into consideration, the control principles and methods for Gonghe bridge, that is controling the stress of both the top and bottom sides of main beam, regarding the second stretching as the hauling cable force method, are offered, and related construction procedures for all construction stages are designed. In addition, comprehensive comments of Gonghe cable-stayed bridge construction progress calculation, implement and tolerance analysis has been done.The success of Gonghe cable-stayed bridge construction control not only improves theoretics and technical level of cable-stayed bridge construction control, but also solves difficult issues of Movable Framework construction method for large span concrete cable-stayed bridge, and it also offers valuable experience for similar bridge construction in future.