Research On Construction Control Of Sui Fenhe Cable-stayed Bridge With Swivel Erection

With the fast development of traffic facilities in our country, need to construct more long-span bridge. Because of the economic and aesthetic advantages of cable-stayed bridge, it becomes one of the leading bridge structures of the long-span bridges. Comparing with the normal construction methods of the bridge, such as precast segmental cantilever method, cast-in-site cantilever method and so on, the swivel erection method will shorten constrution period, not break off the traffic transportation and have remarkable economic and social benefits.Sui Fenhe cable-stayed bridge is a cable-stayed bridge with one pylon and single cable plane. The simple point supporting and even articulation and swivel erection constrution method can not only ensure that its construction and railway transportation will not disturb each other but also shorten the constrution period. By considering the aspects of financial condition and construction period comprehensively, the swivel erection method is the most excellent of all. Set big even articulation of 4 meters in diameter between its pier and bearing platform, the weight of swivel erection is 14000 tons and the span of swivel erection is 97.9m+97.9m which is the first in domestic, its design and construction have few ready-made experiences. In order to ensure the construction process safe and the bridge structure would reach its ideal state, lots of questions in its whole construction control and swivel ereetion construction control are discussed and studied.Firstly, based on the experiences about the cable-stayed bridge's construction control, do emulational anlysis to Sui Fenhe cable-stayed bridge by using the bridge analyzing program of BSAS and Dbridge, analyze the parameters' sensitivity, study the temperature effects, discern the relevant parameter's errors about construction control and optimize its construction state.Secondly, as an example of Sui Fenhe cable-stayed bridge's swivel erection construction control, present the design and construction techniques of simple point supporting and even articulation and level swivel erection for long-span cable-stayed bridge, study its load-bearing system, balance system, power system and adjustment system in detail, check its static stability on the state of swivel erection construction and monitor the whole swivel erection construction.The success of Sui Fenhe cable-stayed bridge's construction control improves the technology level of the concrete cable-stayed bridge's construction control, solves the difficult problems of the long-span cable-stayed bridge's swivel erection construction and provides the valuable experiences for the long-span concrete cable-stayed bridge's swivel erection construction in the future.