Bulgaria Activity Report PDF
Sofia Metro Extension System
Again, during the last year one of the most intensive and interesting was Sofia metro extension. The works were concentrated mainly to the extension of the First metro-diameter (given with thick red line on Fig.1). The construction of two new LOTs included in Stage III of metro development started (Fig. 1, after Sofia Metropolitan JSC) in 2013.
LOT1– Stage III
Construction of LOT 1 started in October 2012 and will be put into operation in 2015. It comprises 5 km long tunnel section with 4 stations. Completion is planned for 2015. About 60% of the total length of tunnels was completed in 2013. Main structures of metro-stations were also completed at 80%. Tunnel works include 220 m long tunnel carried out by SEM (Fig. 2) and 3.5 km tunnels which were carried by cut-cover method.
LOT 2 – Stage III
Construction works started in April 2013. The section is2.5 km long. It consists of 3 metro-stations and double-track metrotunnels. All the structures are constructed by cut-cover method. Station 16 is combined with parking area.
Forthcoming development of Sofia Metro Lines including underground construction
New section, having length of 1300 m, will bestarted in 2014 (shown in Fig.1 with magenta). Completion is planned for 2015. It consists of double-track tunnel 1130 m long and one metro-station (named MS12). Tunnel will be driven by conventional method (SEM).
The alignment of the third metro-diameter was approved in 2011. Its total length is 15.5 km of which about 8.5 km are planned to be underground structures. Conceptual Design is ready. Tender procedures for Contractor are expected to start in 2014.
Fig. 1. Short-Term Scheme for Sofia Metro development