How do you build an underwater tunnel? | HowStuffWorks
Underwater tunnels, like the Marmaray, rely on some extreme construction techniques. Learn more about underwater tunnels at HowStuffWorks.
Immersed-tube Method of Underwater Tunnel Construction
Immersed tube construction of underwater tunnels involves using prefabricated elements that are joined together after their immersion in the places where they are required. They are towed to the tunnel location or floated on specially built barges and then sunk into place. The cross section of the elements is made to the exact requirement of each tunnel and can have different cross sections ...
Tunnel construction - Wikipedia
A tunnel construction is an underground passage provided beneath earth surface or water. Different methods of tunnel construction and their details are discussed. In most of the cases tunnel construction is expensive but it saves time and provides comfort. Large excavation of …
Undersea tunnel - Wikipedia
Underwater Tunnels built across the bottoms of rivers, bays and other bodies of water use the cut-and-cover method, which involves immersing a tube in a trench and covering it with material to keep the tube in place.. Construction begins by dredging a trench in the riverbed or ocean floor.
Methods of Tunnel Construction and Their Details
How are underwater tunnels built? ... To counter the intense pressure above the tunnels during construction-which caused flooding and structural collapses-engineers installed a system of airtight ...