Construction Monitoring And Control Of Tied-arch Bridge With Flying Swallow

Tied Arch Bridge used in more widely in the now, swallows Arch Bridge is one of them. Tied Arch Bridge's construction is a more complex process, in which the tension of cable tie, removal of stent have to be real-time monitoring, analysis and control, thus ensuring the linear and the stress of the completion state meet design requirements. In this paper, the construction of Datong Yantong Bridge as a background, we carried out the construction monitoring of the entire construction process , and developed a detailed construction monitoring program.Yantong bridge construction monitoring used adaptive control method, control the deformation and stress of the bridge construction process. In accordance with the principles of construction to facilitate and structural safety we optimize removal of the stent program. We used the least square method on the structural design parameters were modified and applied to the construction control.In this paper, we established finite element model of the entire bridge through a bridge professional software MIDAS CIVIL, and carried out according to the actual construction process simulation calculations. We practiced construction control through using the adaptive control method to each construction phase, through comparing and analyzing of the theoretical calculations and the actual monitoring values,we used the least square method to estimate and amend the parameters of the main structure,we came to the amendment values of structural state.And we revised the amendment of the structural state parameters back to the calculation of the next construction phase, repeat the process and, ensure the final state of bridge to meet the design requirements, to achieve the goal of this construction monitoring.By the application of the theory of construction monitoring in the actual engineering, including the calculation model of the actual structure,the actual structure of the state monitoring and analysis,and throughout analyzing of the entire construction monitoring process,we obtained the actual experience of tied arch bridge construction monitoring .