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Low tower cable-stayed bridge is a new type of bridge to the rise in recent years, the rapid development due to its attractive appearance, economical and practical, convenient construction, etc.; same time, in order to guarantee the safety of the bridge construction process as well as the bridge After the structure of the internal forces and linear meet the design requirements, we the dwarf tower cable-stayed bridge construction control both necessary, but also have a good sense of reality. Low tower cable-stayed bridge, the contact line of the Beijing-Shanghai high-speed railway, Tianjin and Shanghai engineering background, construction control and construction monitoring, targeted to commence research. The main contents are as follows: 1 introduces the development and research of domestic and foreign construction control technology, the impact of factors outside the control of the construction, as well as the content and features of the cantilever construction method; 2 introduces the basic theory of the construction control for low tower cable-stayed bridge characteristics and the actual situation of the project, a reasonable monitoring program to establish a comprehensive and effective monitoring system, the construction process, data collection, and processing. By analyzing the difference between the theoretical calculations and construction of the actual situation, to determine the structural parameters adjustment calculated data correction, feedback control analysis using adaptive control methods to predict control the construction process of the bridge is the main content of the control scheme, construction status update forward analysis and regression analysis, and the proposed reasonable Precamber values ??are used to guide the construction. Described the main design parameters affect the low tower cable-stayed bridge construction control, and dwarf tower cable-stayed bridge, the contact line of Tianjin and Shanghai, for example, a parameter sensitivity analysis of some parameters to guide the construction. 4 using structural analysis software bridges Dr. establish a full-bridge model, simulation and analysis of the construction process. Consider the impact of temperature and shrinkage and creep analysis draw various stages of construction and bridge stage internal forces, deformation and bridge due to shrinkage and creep deformation, and gives the value of the camber of the construction phase, and for the subsequent construction control provide theories Data. Construction monitoring of contact line low tower cable-stayed bridge, Tianjin and Shanghai Intro. Bridge construction control, adaptive control method include deformation control, stress control and cable force control, the feedback measured results and the calculated results do a detailed comparison of linear, stress and cable force control of results and structure calculations linear, stress and cable force results are in good agreement.
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