Settlement characteristics of immersed tunnel of Hong Kong–Zhuhai–Macau Bridge project

The settlement performance of an immersed tunnel in the Hong Kong–Zhuhai–Macau Bridge (HZMB) transportation project is described. The geological profile underlying the immersed tunnel is presented and the corresponding field monitoring system is introduced. The function of semi-rigid elements is ana...

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Bibliographic Details
Published in:Proceedings of the Institution of Civil Engineers. Geotechnical engineering 2023-01, Vol.176 (6), p.605-617
Main Authors: Wang, Yan-Ning, Wang, Le-Chen, Zhao, Lin-Shuang
Format: Article
Language:English
Subjects:
Bridges
Deformation
Differential settlement
Elastic deformation
Monitoring systems
Silt load
Siltation
Silting
Soil properties
Tunnel construction
Tunnels
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Summary:The settlement performance of an immersed tunnel in the Hong Kong–Zhuhai–Macau Bridge (HZMB) transportation project is described. The geological profile underlying the immersed tunnel is presented and the corresponding field monitoring system is introduced. The function of semi-rigid elements is analysed. The observed results related to longitudinal deformation patterns during construction (e.g. long-term settlement, differential settlement and structural behaviour) are described and analysed. Differential settlement occurred when there was a large variation in soil properties, at the joints of two adjacent elements and in different segments of the same element. Differential settlement occurred in both the longitudinal and transverse direction. During the operational period, permanent settlement was strongly related to back-silting. Tide loading and the immersion of adjacent elements may have caused transient settlement related to elastic deformation, but tide loading had less influence on the permanent settlement.
ISSN:1353-2618
1751-8563
DOI:10.1680/jgeen.22.00200