Here are some pictures and information about Marmaray, Underground and underwater railway-subway tunnel between two continents. The tunnel will be 56 metre deep...
When project complated, it will carry 75.000 passengers per hour.
It's under construction now and will be openned in 2010. Archeological works delayed the main contruction for a while, but it started.
Underground Section Opening: October 29, 2013
Banlieue Section Opening: June 15, 2015
Five giant mole machines (TAB) start to open the underwater tunnel soon. Four of them is coming from Japan and otherone is from Canada. These moles also cover the inside of tunnel with 55 cm concrete beside piercing. This is why they will be buried in a special place at the tunnel after they finish thier jobs and stay there forever
For underground and underwater tunnels four different systems are being used...
You can see some construction photos here. This platform is strengthening the ground under other at the Bosphorus. They are using a special injection method for this, so it is not harming the natural life of the water.
you are welcome. Porject is going on, but will have a break for a few months due to moving season of the fishes. At the meanwhile ground constructions will be continuing. And when fishes pass here, consturcution will start again with the beginning of June and tubes of tunnel will be settled...
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