Challenges in Hong Kong – Zhuhai – Macao Bridge (HZMB) Hong Kong Link Road Project

摘要

The Hong Kong Link Road (HKLR) is part of the prominent structure, Hong Kong-Zuhai-MacaornBridge (HZMB), connecting 3 vibrant cities in Southern China. The works which are administeredrnunder Highways Department of HKSAR comprises design and construction of approximately 9kmrnof viaducts. About 7km of the viaducts are marine structures with three navigation channels.rnThe basic structural form of the viaducts is precast segmental prestressed concrete box girder. Thernspan length of the viaducts ranges from 35m to 180m. Balanced cantilever method is selected due tornthe variability of the span lengths and flexibility in construction. The piers consist of both castinsiturnand precast concrete structures. The viaducts are supported on bored piles with diametersrnranging from 2.2m to 2.8m. Foundation in areas with complex geology such as fault zones hasrnposed a major challenge to the job. Some piles are over 100m long due to complex geology.rnThis paper presents the challenges and solutions employed in the design and construction of thernviaducts. It describes the prestressed schemes employed in both the decks and piers with specialrndetails used in the formation of monolithic deck-column connections. The three main Challenges onrnthe project were the erection in open sea, the vicinity of the Airport and enverinmental constraints.