Heilongjiang(Amur River) Bridge Incremental Construction Control And Bridge State Analysis

The low-tower cable-stayed bridge is a new type of continuous-cable-stayed bridge.Thisnew structure not only has the superior structural performance of a continuous beam bridge,but also has the beautiful characteristics of a cable-stayed bridge.With the widespread attention of low-tower cable-stayed bridges in China,its construction technology and construction control methods also receive attention.A reasonable and effective construction monitoring process can not only better guide construction,but also ensure the safety and correctness of the construction process.It can effectively shorten the construction period and save costs.In this paper,based on the example of low-tower cable-stayed bridge project,the bridge is completed and the internal forces and deformation characteristics of the construction stage are analyzed and studied.At the same time,the key content and methods of the construction control of the bridge's jacking construction are introduced.The temporary structure of the process was reviewed and checked.In this article,the first chapter briefly describes the structural characteristics of the low-tower cable-stayed bridge and the development overview and development prospects of this type of bridge in recent years,and analyzes and compares the low-tower cable-stayed bridge with continuous girder bridges and cable-stayed bridges.The characteristics of the force;followed by the development history and current status of bridge jacking construction technology.In the second and third chapters,taking the Heilongjiang(Amur River)Bridge as the engineering background,the Midas/civil finite element analysis software was used to establish the bridge completion model and the half-bridge model during the jacking construction phase,respectively.The stress state and deformation of the bridge during the completion of the bridge are analyzed in detail,and the bridge's jacking construction method is simulated.The internal force and deformation of the structure in each stage of the construction process are analyzed and calculated,and the key to the structure is selected.The control section is analyzed in detail,and the calculation result is output as the theoretical basis for the construction control of the thrust.Chapter 4 introduces the specific content of the construction control of the Heilongjiang(Amur River)Bridge,including the main beam linear control,cable force control,main beamclosing control,etc.The monitoring results were compared with theoretical calculations to verify the effectiveness of the bridge construction control method and theoretical calculations.Chapter 5 carries out finite element analysis and calculation of the temporary structure of the Heilongjiang(Amur River)Bridge jacking construction,including assembled platforms,steel guide beams,and temporary pier top local structures.The calculation results verify whether the structure meets the design requirements of the code.Chapter 6 introduces two methods of construction control for steel stranded diagonal cables: reverse push method and batch tension method,and verifies the cable error of the two tension methods in the actual construction process.