Design of Scour-Prevention Structures for Immersed Tunnel Foundations and Analysis of Their Stress Characteristics
FENG Haibao
YANG Jingxue
Abstract：Aiming at the adverse effects of backfilling on the installation and structural safety of the immersed tunnel foundation at the connection section of the east artificial island of the Hong Kong-Zhuhai-Macau Bridge,caused by bank flow and the"island head effect",this paper adopts a source-level backfill control method using steel plate covers to carry out stability design and stress characteristic analysis of the scour-prevention structure.Based on the 100-year and 20-year return period wave conditions,two calculation models,namely vertical and sloped revetments,are established.The combined effects of wave action and hydrodynamic forces on the stability of the toe-protection components are systematically considered,and the optimal ballast parameters for the scour-prevention steel plate are ultimately determined.The results indicate that the steel plate cover source-level backfill control technology can effectively mitigate the adverse impacts of continuous backfilling on the installation accuracy and structural safety of the immersed tunnel.The analysis method and ballast calculation approach can provide a reference for the design of scour-prevention structures and determination of ballast parameters in similar large-scale projects.
Keywords：artificial islandimmersed tunnel foundationbackfillingsteel plate coverscour-prevention structure designstress characteristic analysiscalculation model
Publication Date：2026-06-20
Online Publishing Date：2026-09-16(First online date of this platform, not the publication date of the document)
Pages：7( 100-106 )