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Procedura wyznaczania dynamicznej odpowiedzi zapór ziemnych z wykorzystaniem metod dyskretnych

Korzec Aleksandra, Świdziński Waldemar

Inżynieria Morska i Geotechnika

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2019

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nr 1

21--28

PL

Procedura i kryteria budowy poprawnego i ekonomicznego modelu dyskretnego. Podstawowe parametry modelu ściśle związane z dynamicznymi parametrami gruntu oraz funkcje pozwalające na oszacowanie tych parametrów. Procedurę przygotowania akcelerogramu obliczeniowego i czynności prowadzące do zastosowania go jako warunku brzegowego.

EN

The procedure for determining the proper and efficient discrete model. The dynamic parameters of the materials constituting the discrete model and their estimation formulae. The procedure for the preparation of the design accelerogram and steps leading to its application as a boundary condition.

2

Nowoczesne badania trójosiowe istotnym wsparciem współczesnej geotechniki

Świdziński Waldemar, Smyczyński Marcin

Inżynieria Morska i Geotechnika

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2019

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nr 6

309--315

PL

Przedstawienie doświadczeń w prowadzeniu badań trójosiowego ściskania zdobytych w IBW PAN. Omówienie wybranych elementów istotnych dla właściwego prowadzenia badań. Na tym tle prezentacja możliwości współczesnych aparatów trójosiowego ściskania w zakresie prowadzenia specjalistycznych badań – zarówno monotonicznych jak i cyklicznych, w osiowosymetrycznym i pełnym stanie naprężenia.

EN

Presentation of experience gained at IBW PAN regarding the performance of triaxial compression tests. Discussion on selected elements relevant to the proper conduct of the research. On this background, the presentation of the possibilities of modern triaxial compression apparatus focusing on the conductance of specialized tests – both monotonic and cyclic, in axisymmetric and full stress state.

3

Identification of the Causes of a Landslide in Koronowo (Polish Lowlands)

Zabuski Lesław, Kulczykowski Marek, Świdziński Waldemar

Archives of Hydro-Engineering and Environmental Mechanics

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2019

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Vol. 66, nr 1-2

47--56

EN

The paper discusses difficulties of identifying the causes of a landslide. These difficulties are illustrated in the example of a catastrophic landslide on the embankment of the western bank of the Brda River, which affected a bridge abutment of a disused narrow-gauge railway line from Bydgoszcz to Koronowo (Polish Lowlands). The railway was closed in 1992, and after the removal of the track, the bridge served as a pedestrian overpass. The landslide occurred in February 2011. Investigations revealed that the first signs of the landslide were cracks and subsidence that appeared at the embankment crest. Then, an initially slow movement accelerated suddenly, resulting in an over 45 m total displacement of the soil mass. The primary passive cause of the landslide movement resulted from the geology of the mass (loose soils underlain by cohesive soils) and from the steep inclination of the embankment surface. Active causes, however, are often ambiguous. In this case, no significant apparent phenomena which could trigger the movement occurred in the days preceding its initiation. Therefore, a detailed analysis of atmospheric conditions was carried out to identify and explain the causes. It was proved that the fundamental triggering cause of the landslide was a combination of rainfall, snowfall, snow-melting and air temperature. Moreover, an important cause was a faulty construction of a ditch with a sewage pipe on the crest of the embankment.