An Overview of Steel Structures in Hong Kong-Zhuhai-Macao Bridge Project

摘要

Hong Kong-Zhuhai-Macao Bridge consists of 16km of steel box-girder bridge and 6km of steelrncomposite girder bridge, and would be the world’s largest and longest offshore steel bridge onrncompletion. Both types of steel bridge have advantages of light weight, efficiency in load carrying,rnstructural integrity, proven durability and good seismic performance. They are especially suitable forrnshop fabrication, large scale standardized modular structural component assembly and installation,rnwhich would allow effective control of construction activities and working conditions in the oceanrnto mitigate and minimize weather induced safety and quality problems, as well as the impact to thernmarine environment, marine life and marine traffic. However, manufacturing, transporting andrninstallation of massive, large-scale modular structural component would present significantrnchallenges to the lifting equipment, transporting facilities and construction safety management.rnIn this paper, an overview of the mission and goal, construction constraints, consideration for bridgerntype selection, the development of basic design criteria, the quality control and acceptance criteria,rninspection and maintenance accessibility, requirements for transportation and erection of large scalernmodular structural components, quality control and innovations in steel fabrication are presentedrnfrom the point of the bridge owner. Special studies related to technical challenges such as windrnstability, deck fatigue control, pavement durability, protection coating, as well as experience andrnlessons learned will also be discussed.