Project Name: Foshan Dongguan Intercity New Shiziyang Tunnel

Construction Unit: China Railway Tunnel Group Co., Ltd

Equipment model: Herrenknecht 'Lion Ocean' shield tunneling machine

Blade diameter: 13.61 meters

Excavation length: 4.9 kilometers

Project features:

The Lion Ocean Tunnel has a total length of 6476.4 meters, including a shield section of 4900 meters, a single tunnel with double tracks, a shield tunnel structure with an inner diameter of 12 meters, a pipe structure thickness of 550 millimeters, and a tunnel structure outer diameter of 13.1 meters; And it has various 'extraordinary' characteristics such as a large diameter (13.1 meters), high water pressure (maximum water pressure 7.8 Pa, the highest water pressure railway shield tunnel in China), complex geological conditions (soil rock composite strata, crossing 3 fractured zones and 2 underwater faults), and shield tunneling length (up to 4.9 kilometers), making it a truly high standard and high-risk intercity railway underwater tunnel.

Year of commencement: 2016

Completion year: 2019