— Project Description:

The project is located in the south part of the city of St. Petersburg and involves the construction of a single- bore, double-track tunnel between Stations “Uzhnaya” and “Prospect Slavy”. This section is approximately 3.8km-long and it will be excavated by means of an EPB-TBM manufactured by Herrenknecht, with external diameter of 10.3 meters. The main elements of project are: the depot, the "Uzhnaya" station, the TBM launching shaft and the tunnel towards the "Prospect Slavy" station. Along the line the "Dunaisky Prospekt" intermediate station will be built by Cut&Cover method. From an urban context point of view the line develops in 3 areas:

1. Area 1. It is an non-urbanized area from the TBM launching shaft to pk 250 and it is characterized by two main critical interferences: a) the under passing of highway KAD, and b) the under passing of the railway line about 400meters from the TBM launching room.
2. Area 2. The line performs a double curve and in this area the tunnel underpass a gas station and a fuel storage tanks; finally the tunnel runs along Buharestkaya street under a tram line and close to some commercial buildings.
3. Area 3. In the third portion of the line, where the rail level is deeper, the tunnel lies below a free area.

— Description of Services:

• Perform the Technological Regulation (Technical and Operational Procedures and Method Statements) for the tunnel excavation;
• On-site and in remote construction follow-up with the support of GDMS system – GIS – WEB software application for data collecting and real time TBM parameters and monitoring data verification.