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Metro-station 20 – Project for expand of the Sofia metro, stage III, Lot 1, section from Tsarigradsko shosse

The section executed by joint-venture „Stanilov-Metroproject“ begins straight from the „Tsarigradsko shosse“ Blvd., crossing a plain part , then overcome partly with the open structure the strait slope, in plain part crossing „Prof. Tsvetan Lazarov“ Blvd and reaches the area of Metro station 20. The main part of the Lot is underground with 1046 m length and includes one underground metro station – Metro station 20.

2012 - 2015

The section executed by joint-venture „Stanilov-Metroproject“ begins straight from the „Tsarigradsko shosse“ Blvd., crossing a plain part , then overcome partly with the open structure the strait slope, in plain part crossing „Prof. Tsvetan Lazarov“ Blvd and reaches the area of Metro station 20. The main part of the Lot is underground with 1046 m length and includes one underground metro station – Metro station 20.
The tunneling part is from the km 2+ 138.90 up to 2+352.00. In the project is presented the technical decision for the underground construction using the well-known in practice New Austrian Tunneling Method (NATM). It is provided a construction of the two-way metro tunnel with sizes of the cross-section, defined by the required construction gauge for the metro trace. At the design of tunneling structure are taken into account the variable land cover configuration of the terrain in the area of the pri- portal section, the presence of buildings along the route and possible traffic over the underground facility.
Metro station 20 is situated between „Tsvetan Lazarov“ Blvd south from  „Captain Dimitar Spisarevsky“ Str. In the  north under the trace of the station is performed  an open way, from the bottom up, in an open stove with slopes  Presently perform work will be within the scope of a block of 2 km. 3 078.715 to km. 3 125.465, namely: Mass excavation to bottom hall 2, the depth of the trench 12 meters concrete base, two layers of polymer hydro-expansion joint on the bottom, protected and reinforced concrete for the foundation slab.
Employer: „Metropoliten“ EAD
Engineer – consultant: DZZD „NR Rubicon“
Contractor: Joint-venture „STANILOV-METROPROJECT“ – members: „STANILOV” Ltd – Leading partner  and “Metroproject“ EAD
Sub-contractor: „Start Engineering“ EAD