港珠澳海底沉管隧道近陆域段管节防护设计

沉管隧道的回填防护根据功能需求,在纵向上可按照普通段、航道段及近陆域段3个分区进行防护。近陆域段防护需要考虑的影响因素多,且安全风险高,是沉管隧道工程防护设计的重点。以正在建设的港珠澳跨海通道工程中海底沉管隧道近人工岛陆域段的回填防护为研究对象,针对近陆域段采用柔性与刚性2种防护方案进行研究比选,提出适合项目特点的护坦潜堤式柔性防护方案,并详细分析了柔性防护方案的设计细节,通过防撞、防锚及稳定性方面的计算分析以及工程实践,证明这种防护方式是科学合理的。

Design of Backfill Protection of Near-land Section of Immersed Tunnel of Hongkong-Zhuhai-Macao Link

Based on the function requirement, the backfill protection of immersed tunnels can be divided into three sections, i.e., normal section, navigation channel section and near land section. Among these sections, the design of the near land section is influenced by many factors, therefore it is the key part of the design of the backfill protection of immersed tunnels. In the paper, the backfill protection of the near artificial island section of the immersed tunnel of Hongkong Zhuhai Macau Link is studied, comparison and contrast is made between flexible protection and rigid protection, and a flexible solution is proposed for the project. Furthermore, the design details of the flexible protection solution are provided. Calculations and tests show that this type of protection is rational and can be used for other similar projects.