As the world′s largest span steel tube concrete arch bridge,the Wujiang Grand Bridge faces significant challenges in deformation control,construction stability,transportation and installation,and system transformation coupling forces due to factors such as temperature difference,wind field environment,terrain,and multiple links during construction.At the same time,higher precision construction control requirements are also proposed.The bridge adopts a design scheme of arch column beam fully consolidated,fully bolted and unsupported integrated stress system,which brings new challenges to the construction of the bridge.Based on this,it comprehensively tackles issues such as the calculation method of column and beam manufacturing linearity,manufacturing linearity control,and millimeter precision control of high-altitude installation.It proposes the theory of precise control of the optimal original formed arch and arch structure bolt connection throughout the entire process,as well as refined arch bridge prototype pre assembly manufacturing technology,prototype reset installation control technology,and fully consolidated bolt installation technology to reduce high-altitude operation time.It have achieved a breakthrough in the construction control accuracy of large-span arch bridges from centimeter level to millimeter level,laying the foundation for the industrialization and assembly development of large-span arch bridges.
关键词
钢管混凝土拱桥/全固结全栓接/原形成拱/毫米级/精准控制
Key words
steel tube concrete arch bridge/fully consolidated and fully bolted/arched in its original shape/millimeter level/precise control1
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