China has reached a major civil engineering milestone with the construction of what is being described as the world’s largest-diameter underwater shield tunnel, showcasing the country’s rapidly advancing expertise in underground infrastructure. Designed to operate under extreme water pressure and unstable seabed geology, the tunnel represents a new benchmark in submerged transportation engineering. Underwater shield tunnels of this scale are made possible by next-generation tunnel boring machine

Whiteboard Disasters: Mont Blanc Tunnel Fire #disastroushistory #disasters #history #fire #whiteboarddisasters | Disastrous History