Key Technologies for Construction of Super-high Steel-concrete Composite Pylons for Large-span Cable-stayed Bridges
with the development of national transportation,the bridge span is getting larger and larger.As one of the widely used bridge forms,the structure of long-span cable-stayed bridge is complicated and difficult to construct,so we must do a good job of stress analysis,optimization of design and construction technology.The construction of steel-concrete composite pylon (steel shell+concrete in pylon) is the key and difficult point in the construction of cable-stayed bridge,in the design and construction stage,it is necessary to combine the structural form and the mechanical characteristics of the bridge pylon,reasonably select the steel shell-concrete connection technology and the good performance concrete,reasonably set the steel-concrete combination section position,so as to improve the overall mechanical performance.Taking a cable-stayed bridge project as an example,this paper analyzes the technical types and key points of steel-concrete composite pylon construction,aiming at providing reference for similar projects.
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