The tunnel that will connect the cities of Santos and Guraujá, on the coast of São Paulo, will be the first immersion of Brazil, with 870 meters. In Europe, meanwhile, a larger scale project is being built with the same technique.
Calling Denmark in Germany, this will be the tunnel immersed in the world, 18 kilometers long. Unlike a excavated tunnel, such as the two sides of the stain channel, this construction uses prefabricated modules, without drilling machines.
Cause of prefabricated tunnels less environmental impact and they are built faster. In addition, since the tunnel is sitting on the bed of the water body, it does not need to reach great depths, such as the excavated tunnels. The cost may also be less, depending on the work.
The tunnel under construction in Europe will be the largest in the world of its category
The work uses prefabricated concrete blocks, placed in a dump excavated at the bottom of the sea, connected to each other. The structures measure 217 meters long, 42 meters wide and nine meters deep, with a weight of 73,000 tons, the equivalent of ten Eiffel towers.
In total, 79 blocks will be installed between Rødbyhavn, next to Lolland Island, and Puttgarden on the German island of FHman, 40 meters deep in the Baltic Sea.
A factory was built in Rødbyhavn on an area of 220 hectares to meet the demands of the project exclusively. The date for the immersion of the first structure has not yet been established, but this step is expected to end in 2029.
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“This is a process very complex and also very dependent of the weather. Currently, we are trying the highly complex ships that have been especially built for our project, “said Denise Juchem, spokesman for FEMERN A/S, the Danish state company responsible for the project, Cnn.
On the Danish and German sides, the first part of the tunnel on Earth has already been completedwith the end focused on Fehmanbelt now water. This is where the first block will be connected.
The cost of the project was budgeted 7.4 billion euros ($ 46.5 billion R in direct conversion) Given the construction of Two string roads submerged in both directions, in addition two electrified rallins.)
How is the São Paulo coast project?
In the tunnel submerged between Santos and Guarajá, the system will consist of six prefabricated concrete modules in a dry dock, which will then be “immersed” in the water for the seal and waterproof test. The modules will then be transported by fluctuation to the place where the tunnel will be installed at the bottom of the sea.
The company will receive investments of $ 6 billion R and is part of an association between federal and state governments, through the Ministry of Ports and Airports.
