The Long-Span Singal Tower Cable-Stayed Bridge Constuction Control And Analysis Studying

With the development and improvement of modern science and technology and electronic computer gradually, and the quick development and extensive application of modern large construction mechnical equipments and construction architectural material, the construction of long-span cable-stayed bridge is not only proved to be true and feasible, but also has been taken into reality. Although construction and construction control procedure of long-span cable-stayed bridge is a very complicated work, at present, analysis and research on construction control of long-span cable-stayed bridge has become an important problem that many bridge engineers and researchers pay an attention to. First, this paper describes the concept,feature, importance,development trend of construction control system of long-span cable-stayed bridge. Following, the establishment of construction control of long-span cable-stayed bridge are introduced. Third, this paper makes an elaborate analysis and research on construction control (monitoring and control) in the construction stage of long-span cable-stayed bridge, which is the most important part in this paper.Firstly, based on construction controlling both domestic and abroad in the construction state on cable-stayed bridge, the system of construction control of cable-stayed bridge is discussed and analyzed. The chief problem of the construction control of cable-stayed bridge is making certain the theory, content, principle, and measure. At the same time the bridge is imitated, and taking the imitation result as theory track of the construction control. So, the parameter identification methods, the gray control system, the kalman filtering methods and adaptive control methods were summarized from the point of construction control methods that were used in the project. Forward-calculation method and back-running method and no-stress method are methods, which are used at the construction control of cable-stayed bridge. All the factors of construction state deviated ideal design state are discussion, which are valid control for process of construction.Secondly, aiming at Nan Chong JiaLingJiang Bridge, MIDAS are used to set up the space model of this Bridge, which is simulated and analyzed in the construction state of the cable-stayed bridge. In the process of construction state, the imitated measure of structure component is discussed and the plane model is analyzed on the imitation is labored and coMpared with the data of each construction phase form the building site, and the change rule and influencing factor of all the parameter in forward-calculation for cable-stayed bridge construction control are summarized which has high reference value for similar cable-stayed bridge.