The experiences gained during the preparation of planning permission for the second phase of construction of the East-North section of the second metro line in Warsaw

In January 2018, ILF Consulting Engineers Polska obtained a decision concerning the location of the second phase of the second metro line in Warsaw construction. Currently, a building permit decision is being pursued and a tender in which the contractor will be selected is being proceeded. The designed extension of the currently constructed section includes three metro stations, three track ventilation stations, a TBM dismantling chamber and two twin tunnel tunnels with a total length of approximately 5,8 km. The section of the metro will run through the district of Targówek (with various degrees of urbanization), under existing streets, single-family houses, in the vicinity of multi-storey residential blocks and will cross the Bródno Canal.

During the presentation, the most important issues concerning the underground construction, geotechnical designs of stations, track facilities and tunnels will be discussed. Issues related to the assessment of the impact of deep excavations and tunnelling on the surface will be also analyzed. The methods of reduction of the mentioned impacts on the existing buildings will be also presented and illustrated by the case of the bridge crossing the Bródno Canal and residential buildings located in the immediate vicinity of a deep excavation. The importance of BIM technology and numerical modelling in the context of the implementation of the complex, multi-branch projects will be particularly stressed.

Damian Romaniak, ILF Consulting Engineers Polska sp. z o.o.

Warsaw University of Technology, Civil Engineering Faculty. graduate. He specialized in bridges and underground construction. While studying, he underwent many apprenticeships, even in China. Awarded by the Polish Geotechnics Committee for his M.A. thesis. He authored many publications concerning tunnels and numerical modelling. Currently, he is an assistant designer in a Geoengineering and Construction Structures Team.

As for his other professional career, he joined teams executing geotechnical and construction projects, e.g. metro stations and tunnels, along with the accompanying infrastructure and road tunnels. Apart from that, he was involved in preparing geotechnical risk analysis.