为攻克复杂富水地层超大直径盾构区间联络通道建设难题，以海珠湾隧道区间5号联络通道工程为依托开展研究，创新性提出一套超大直径盾构隧道机械法联络通道的综合施工工艺，包括研发同步施工内支撑辅助系统，通过独特设计的上下传力支撑构件连接主线隧道管片，为通道掘进提供稳定反力并预留运输空间确保同步施工； 利用地层注浆微加固技术依据地层特性精心设计注浆点位及浆液，增强土体强度； 采用由玻璃纤维与钢筋混凝土组合形成的特殊衬砌管片结构并在关键部位设置内覆钢板缓解应力集中； 优化密封套筒始发接收工艺保障施工安全。经工程实践与监测分析可知： 该工艺可实现主线隧道与联络通道高效同步施工，大幅提升效率； 施工中5号联络通道周边环境及主线管片沉降变形均未超限，顶管机掘进时始发端洞门区域管片受扰明显，最大沉降为-5.6 mm，接收端破洞时管片最大沉降为-8.6 mm，整体变形控制良好。

Herein, a case study is conducted on the No. 5 connecting passage project of the Haizhu Bay tunnel. Then a series of comprehensive construction technologies for a mechanized  connecting passage of a super-large diameter shield-tunnel are innovatively proposed. These technologies include: (1) A synchronous construction internal support auxiliary system: uniquely designed upper and lower force transmission support members connect the main tunnel segments, providing stable reaction force for the passage tunneling and reserve transportation space for synchronous construction. (2) Accurate grouting points and slurry: the ground grouting microreinforcement technology is used to enhance the soil strength. (3) A glass fiber and reinforced concrete composite lining segment structure: an inner cladding steel plate is set at key positions to relieve stress concentration. (4) Optimized shield launching and receiving processes to ensure construction safety. The engineering practice and monitoring analysis show that these technologies guarantee efficient synchronous construction of the main tunnel and the connecting passage, greatly improving the construction efficiency. The settlement and deformation of the surrounding environment and the main tunnel segments of the No. 5 connecting passage are within allowance. The maximum settlement of seriously-affected segment at pipe jacking machine launching end reaches －5.6 mm, and that at receiving end reaches －8.6 mm, indicating good overall deformation control effect.