Stations will connect “love”
A tunneling shield with a lyrical name goes from “Lefortovo” to “Aviamotornaya”
On October 19, a tunnel-boring mechanized complex (TBMC) from the Herrenknecht company moved from the Lefortovo assembly chamber towards the future Aviamotornaya station. The shield was called the beautiful female name “Love”.
The signal to start was given by the general director of Tunnel-2001 LLC, Ilya Gevorgizov, after which a bottle of champagne was broken against the shield wall and the conveyor belt began to move.
Six red stars are drawn under the inscription “Love” - according to the number of tunnels already built by Valery Borodulin’s site.
“Our tunneling site was formed four years ago,” says Borodulin. - By Metrostroy standards - not so long ago. But over the past time, we have been able to complete two stages on the southern extension of the Sokolnicheskaya line, the same number on the Kalininsko-Solntsevskaya line, and a third tunnel is being built for the Third Interchange Circuit. We are ready to solve any problems. We have a wonderful chief foreman Vasily Astashkevich and reliable pilots.
“Lyubov” began moving along the route of the right section, and since September 11, the tunnel-boring complex “Elena” of Evgeniy Bibikov’s section has been building a tunnel on the left. This means that the geological conditions of these places are already known: immediately after the start, quicksand begins, then it is replaced by clay. It is clay layers that are most suitable for a shield with a soil load, which is what the TBM at the Borodulin site is. But we still have to break through to the clay.
The most undesirable thing on a route with quicksand can happen in the first meters, when you pass the fences of the pit. To avoid the removal of moving soil into it, the necessary measures are taken in advance. Cement mortar is pumped from the surface into the mass behind the fence - a so-called weight is formed. In addition, a double-circuit rubber seal is installed on the starting ring, into which special mastic is pumped.
Sergey Shkarin, General Director of UMM CJSC:
The refurbishment or restoration of the shield was carried out by our specialists. We will provide technical support for it. "Herrenknecht" can cope with any type of urban subsoil. You just need to prepare it accordingly and take the necessary measures. And in this sense, only the moments of transition from one breed to another are difficult for us. Our site of Dmitry Lobankin is currently occupied on three panels at once.