The undersea tunnel of the Shenzhen-Zhongshan Bridge witnessed the completion of the sinking and docking of its E22 tube section on October 21. A total of 31 immersed pipe sections have been installed, setting a new world record for the speed and accuracy of floating installation of largely immersed tubes. The undersea tunnel is 6,845 meters in length, with the immersed tube section reaching 5,035 meters, which is the longest and widest steel-cased concrete immersed tube tunnel in the world. The construction of the project has entered its final sprint stage and is advancing the fabrication and related work for the last tube section (E23) and the final joint. The closure of the tunnel known as the "Undersea Great Wall" is in sight.

10月21日，深中通道完成海底沉管隧道E22管节的沉放安装，目前累计完成31节管节沉放，创造了大型沉管浮运安装速度和精度的世界新纪录。深中通道海底隧道长6845米，其中沉管段长5035米，为世界上最长、最宽的钢壳混凝土沉管隧道。项目沉管隧道建造已进入最后冲刺阶段，正推进最后一个管节（E23）及最终接头的制造和相关演练工作，“海底长城”合龙在望。