Shantou Bay Subsea Tunnel is the first subsea high-speed railway tunnel with a single-hole double-track running at a speed of 350 kilometers per hour at home and abroad.In the field of railway tunnels, the diameter of its shield tunneling, the number of active fault zones it crosses, and the complexity of construction methods are among the highest in China. Up to now, the special exploration for the F9 and F10 faults in the main channel section of the tunnel is drawing to an end, which will provide strong technical support for the tunnel's sea-crossing project. 

For the special exploration for the F9 and F10 faults in the main channel section of Shantou Bay Subsea Tunnel this time, a total of 128 geological boreholes were made in the sea, and the geological characteristics such as the fault distribution position, the fragmentation degree of rock mass, and the hydraulic connection are explored from multiple angles. Based on the results of this exploration, the General Contracting Project Department of Shantou-Shanwei High-speed Railway of China Railway Design Corporation will formulate a targeted design and construction plan, carefully organize and advance the construction of the remaining tunnel in a safe and orderly manner, to ensure that the tunnel is completed on schedule. 

Source:Shantou Daily, June 22, 2022

　　汕汕铁路汕头湾海底隧道海上勘探即将完成

　　汕头湾海底隧道是目前国内外首座单洞双线运行时速350公里的海底高速铁路隧道。在铁路隧道领域，其盾构直径、穿越活动断裂带数量、工法复杂程度，堪称国内之最。目前，隧道主航道段F9、F10断层专项勘察已接近尾声，将为隧道穿海工程提供有力的技术支撑。

　　此次汕头湾海底隧道主航道段F9、F10断层专项勘察，共在海上布设地质钻孔128个，从多个角度探明断层分布位置、岩体破碎程度、水力联系等地质特性。结合此次勘探成果，中国铁设汕汕铁路工程总承包项目部将制定针对性的设计施工方案，精心组织，安全有序推进剩余隧道施工，确保隧道如期贯通。

来源：汕头日报 2022-6-22