Sofia Metro Extension Project, Third Metro Line - Botevgradsko Shosse Blvd. - Vladimir Vazov Blvd. - Central part of the city - Ovcha Kupel residential area, stage II with four metro stations; separate position № 2 - near MC 18 with 2 metro stations - working shaft for implementation of TU under NATM 

Client:   SOFIA MUNICIPALITY / "METROPOLITEN" Jsc.
Architecture:   BIAS-M Ltd, arh.Evangelina Sirakova
Main contractor:   METROBUILD WEST ASSOCIATION
Facility length:   900 m
Design:   Complex design
Technology and features:    - metro tunnel built by Top-Down method on slotted walls, monolithic reinforced concrete
 - ventilation system (VU) - partially Top-Down, partially open method, monolithic reinforced concrete
 - tunnel section built in an open way from monolithic reinforced concrete
Phase/stage:   in operation since 2021
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