广深港客运专线狮子洋隧道为我国首座水下铁路隧道，也是我国第一条特长水下隧道，其设计速度达350 km/h，该隧道为广深港高速铁路的关键性工程。针对该隧道的工程地质环境和采用的盾构法施工技术，特别是该隧道在我国首次采用了盾构对接方法施工，介绍了该隧道修建的有关设计与施工的技术，并提出了相应的技术措施。

Shiziyang subaqueous tunnel, a part of Guangzhou-Shenzhen-Hongkong dedicated passenger high-speed railway, is the very first underwater railway tunnel of China, also the first extra-long underwater tunnel of our country. Its design speed reaches 350 km/h. The tunnle is a key project of Guangzhou-Shenzhen-Hongkong dedicated passenger high-speed railway. Basing on the engineering geology environment and adopted tunneling technology of Shiziyang tunnel construction, the thesis introduces comprehensively design and tunneling technology of the tunnel, also puts forward corresponding technical measures. In the project, tunneling is going to be carried out by shield machine from both portals, which is also the first practice of its kind in our country.