Double-track tunnels in St. Petersburg metro.

Addition to the post http://sdelanounas.ru/blogs/16610/.

In the journal "Tunnels and Underground" in March 2011 published an article explaining the concept of building tunnels dvuputnyh shield diameter of 10 m, the supply of which recently (see above) "Metrostroy" signed the contract.

"The technology of construction of double-track tunnels St. Petersburg underground" — AJ Starkov, chief engineer of "Metrostroy", "Tunnels and Underground" № 2, 2011.

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