11-10-2017, 08:02 PM
Literature review about submerged floating tunnel
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literature review for submerged floating tunnel
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Literature review about submerged floating tunnel
18-10-2017, 09:21 AM
A submerged floating tunnel (SFT), also called a suspended tunnel or Archimedes bridge, is a tunnel that floats in the water, supported by its buoyancy (specifically, using hydrostatic thrust or the Archimedes principle).
The tube is placed under the water, deep enough to avoid water traffic and weather, but not so deep that high water pressure should be treated, it is usually sufficient 60-50 feet (20-50 m). Cables anchored to the Earth or pontoons on the surface prevent them from floating to the surface or submerging, respectively.
The concept of submerged floating tunnels is based on known technology applied to floating bridges and offshore structures, but the construction is mostly similar to that of submerged tunnels: one way is to build the pipe into sections in a dry dock; then float these to the construction site and sink them in place, as long as it is sealed; and, when the sections are secured together, the seams are broken. Another possibility is to build the unsealed sections, and after welding them together, pump the water.
The ballast used is calculated so that the structure has an approximate hydrostatic equilibrium (ie, the tunnel has approximately the same overall density as water), while submerged tube tunnels are further weighed to load them to the seabed. This, of course, means that a submerged floating tunnel must be anchored to the ground or water surface to keep it in place (which of these depends on which side of the equilibrium point the tunnel is).
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