How long do you think before an earthquake makes the whole tunnel unusable ?

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If the English channel tunnel is 50 km why wouldn't this work that is only 18 km long?

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True, at the same time, channel tunnel is a different tech, it is a hole in the ground and not chunk of straight pieces joined together.

it really all depends if earth stand still (or moves very little)

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Yeah saw that had some time trying to figure out what they meant with the longest immersed tunnel but the "Chunnel" is an undersea tunnel not an immersed tunnel...

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The Chesapeake Bay Bridge–Tunnel (en.wikipedia.org) has been in service since 1964. It gets hit by a hurricane every few years.

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Ooh is that the same bridge as in bridges of Madison county starring Clint Eastwood?

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The construction of the tunnel site is moving in a quick pace and so is the factory where the elelements for the Fehmarnbelt tunnel are produced.

Let's see, we've already witnessed "warp speed" production of absolute disastrous proportions. We've seen affirmative action pedestrian bridges collapse before completion, aircraft that drop out of the sky... I'm thinking this won't even require an earthquake. Two weeks after it's 90% complete.

Society has completely lost its ability to build anything more complex than a two story home. It won't be long before we're back to mud huts.

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