Construction Control Study Of Multispan Ring-shaped Steel Tower Partially Cable-stayed Bridge

Partially cable-stayed bridges are a new form of bridge that has emerged from the development of the application of cable-stayed bridges and continuous girder bridges,and are widely used because they combine the advantages of large span and aesthetic appearance of cable-stayed bridges with the convenience and stiffness of continuous girder bridges.The multi-span steel-mixed combination tower style partially cable-stayed bridge is a relatively new form,mostly used in urban bridges,and its ornamental requirements make construction control work more detailed and cumbersome.The multi-span ring tower partially cable-stayed bridge is characterised by more spans,new tower forms and more stringent tower linearity control requirements than other single or twin tower partially cable-stayed bridges.In order to ensure that the force state and alignment of the multi-span ring tower partially cable-stayed bridge in this project are highly compatible with the design expectations,the bridge model was studied and the results analysed,and combined with the theory of partial cable-stayed bridge construction control,to provide research ideas and corresponding calculation methods for the construction control of other bridges of the same type,and to enrich the bridge construction control research theory.In this paper,Civil is used to analyse the overall bridge model,and the results of the mechanical index calculations are used as the theoretical support for the construction control work.Fea was used to carry out a physical analysis of the most complex block zero of pier 7# and the results were used to predict the key indicators for the different construction stages of the block zero.A combination of Civil calculations and hand calculations were used to verify that the adopted support system could meet the construction requirements.The overall construction control work was completed through the adaptive control method,by collecting the actual engineering data and then comparing the actual values with the finite element software calculations,and any stage errors that occurred were also studied and analysed to adjust the finite element model so that the construction control work could be completed in a scientific and efficient manner.Combined with the construction control index data,the bridge’s cable force,deck alignment and steel tower alignment are all highly consistent with the design index,indicating that the construction control work has achieved more satisfactory results and reached the ultimate goal of construction control.