Research On The Control Method Of Continuous Beam Bridge In Ballast Track Of Guang-Kun Railway

In the practical application of the bridge engineering, the type of bridge is usually determined as the span. The span in the 40-150m scopes bridge, the application on the continuous beam bridge occupied the dominant position. The reason is that the continuous beam bridge has the advantages of small deformation, good stiffness, low cost, fast construction progress, reasonably stress, the driving comfortable and so on. So it is applied on highway and railway construction of our country. The structure of bridge complex, and need construct of repeated system transformation, and result of high difficulty in linear controlling, because the continuous beam cantilever construction. So it is necessary to construct control of cantilever construction of the continuous beam bridge, and research on the construct control method.The engineering background of this article is the (40+64+40)meter continuous beam of Lufeng double big bridge in Guangtong-Kunming railway Engineering in Yun Nan. According to the features of continuous beam and construction conditions, draw up the program of construction control. And research on construction control method on the linear, stress, and temperature of continuous beam.This article bases on the finite element method, and the "Doctor Bridge" software as a calculation tool, model simulation, and analysis, controlling the continuous beam construction, due to adaptive control system and predictive control system. By comparing the data of measured and theory, achieve the purpose of construction control.In the whole process of construction control of the continuous beam, the result of construction control is that the structure of bridge's linear, stress close to the design. And the overall linear of the bridge is beautiful, and reached the more desired effect.