The stadium on Krestovsky prepared the path for the withdrawable pitch

The latest update on the progress of Zenit's new stadium and what's happening on Krestovsky. 
На стадионе на Крестовском смонтированы пути для выкатного поля
The weight of the withdrawable pitch is 8400 tonnes, it is moved to the south side of the stadium on 18 automated rail tracks. 

You can follow the progress on the stadium on the project's official website here: http://piterarena.com/en