They will connect Aviamotornaya and Elektrozavodskaya stations with the radial lines

“Tunneling of two underground pedestrian crossings on the Big Circle Line (BCL) of the Moscow Metro is carried out by the mining method. They will connect the previously opened Aviamotornaya and Elektrozavodskaya with the same name stations on the radial lines”, said Andrey Bochkarev, Deputy Mayor of Moscow on Urban Planning and Construction.

Mosinzhproekt Engineering Holding acts is an operator of the Moscow Metro Development Programme.

“During the implementation of the Moscow Metro Development Programme to construct underground tunnels, mining method is used in addition to machine tunneling method. In particular, this method is used to create two interchanges on the Big Circle Line”, said Andrey Bochkarev.

According to him, this method is used mainly in the construction of auxiliary facilities: interchanges, side walls, exit chambers, ventilation chambers, maintenance and service facilities. Machine tunneling in this case is inexpedient because of the small dimensions and specific trajectory of the tunnels under construction.

“Meanwhile, builders turn to special methods of stabilization of soils and rocks in addition. This is done to ensure safety of excavations and exclude their impact on the urban infrastructure”, specified Andrey Bochkarev.

Yuri Kravtsov, General Director of Mosinzhproekt JSC, said that similar work is carried out at other sites of the Moscow metro under construction near the operating sections.

In particular, excavation by mining method is used in the construction of headshunts near the Novatorskaya station on the Troitskaya Line. It was launched in early 2022. Half of the total planned scope of work has already been completed.

“Another object of this kind is the drift on the Rublyovo-Arkhangelskaya Line under construction between the prospective Zvenigorodskaya station and the current Shelepikha station of the BCL. The vertical working is two-thirds complete”, added Yuri Kravtsov.

In total, metro builders plan to tunnel 324 linear metres during the year, and more than 250 of them have already been tunnelled in the first half of the year.

Over the last 10 years, more than 125 kilometres of metro lines, 61 metro stations and 11 electric depots were built and commissioned in Moscow with participation of Mosinzhproekt Group of Companies.