Numerical analysis of the impact of construction of an underground metro line on the urban environmen t – a case study from the Vistula Valley in Warsaw
Ł. Kaczmarek , Paweł Popielski
AbstractUnderground construction in urban areas is a complex investment, impacting existing buildings. The paper presents a case study of the 2ndmetro line, in close proximity to the Warsaw Slope. To analyze the aforementioned issue, the finite elementmethod (FEM) was used. First, the initial state was generated. Next, the southern tunnel of the metro construction was simulated. Then, the northern tunnel of the metro construction numerical model was prepared. Based on this simulations and cumulative settlements of a particular building above the metro were calculated. The results were confirmed by land surveys. The calculations show the maxi-mum vertical displacement of 8 mm below the building’s foundations. This value does not affect the stability of the building or the slope nearby. Nevertheless, it can impact serviceability. Such settlements can generate cracks in buildings. Furthermore, the value of the calculated safety factor of the Warsaw Slope in this section is 1.1. Hence, slope changes require continuous observations. The numerical procedures presented show the usefulness of FEM and its suitability for the purposes of building an extension of the 2nd metro line.
|Journal series||Przegląd Geologiczny, ISSN 0033-2151|
|Publication size in sheets||0.5|
|Keywords in Polish||osiadania, statecznoœci skarp, obliczenia numeryczne, tunel metra, Skarpa Warszawska|
|Keywords in English||settlements, slope stability, numerical calculations, metro tunnel, Warsaw Slope|
|Score|| = 12.0, 28-11-2017, ArticleFromJournal|
= 12.0, 28-11-2017, ArticleFromJournal
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