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Study of displacements of a bridge abutment using FEM

Wymysłowski M., Kurałowicz Z.

Studia Geotechnica et Mechanica

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2016

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Vol. 38, nr 2

61--70

EN

Study of displacements of a bridge abutment using FEMpotential to increase foundation bearing capacity and reduce displacements; but their presence is not usually taken into account in foundation design. In this article, the results of finite element analysis of a typical abutment foundation, with and without cover of sheet piles, are presented to demonstrate these effects. The structure described is located over the Więceminka river in the town of Kołobrzeg, Poland. It is a single-span road bridge with reinforced concrete slab.

2

Analiza przemieszczeń przyczółka mostu posadowionego bezpośrednio w osłonie ścianki szczelnej

Wymysłowski M., Kurałowicz Z.

Inżynieria Morska i Geotechnika

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2014

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nr 2

129--139

PL

Wpływ osłony ze ścianki szczelnej wykonanej wokół fundamentu bezpośredniego na przemieszczenia przyczółka i rozkład naprężeń w podłożu. Analiza przypadków skokowo narastającego obciążenia zewnętrznego. Różne sposoby połączenia ścianki szczelnej z fundamentem bezpośrednim przyczółka.

EN

Effect of the shield made from the sheet piling located around the foundation on displacements and stresses in the subsoil. Analysis of cases gradually increasing of the external loads. Various methods of connecting sheet piling with foundation of abutment.

3

Methane fermentation of poultry slaughterhouse waste

Wymysłowski M., Łuczak M., Zawadzka A., Imbierowicz M., Chacuk A.

Polish Journal of Chemical Technology

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2010

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Vol. 12, nr 3

15-18

EN

One of the alternative methods for the treatment of animal by-products is their utilization in biological processes with a simultaneous production of energy-rich biogas. The results of the investigations of methane fermentation of animal waste are discussed in the study. The methane fermentation was carried out at 35°C. The substrates used in the experiments included poultry heads and muscle tissue. Furthermore, the fermentation residues subjected previously to hydrothermal processing were used as a substrate. The suspension of those substrates in the initial concentration range from 1 g TOC/dm3 to 11 g TOC/dm3 was used in the process. Additionally, the effect of the preliminary stage of hydrothermal substrate processing on methane fermentation efficiency was assessed. Poultry waste was subjected to thermohydrolysis at the temperature from 100°C to 300°C and pressure up to 9.0 MPa. The efficiency of the methane fermentation was estimated on the basis of biogas generated in the process. The biogas production was between 0.17 Ndm3/g TOC and 1.53 Ndm3/g TOC. In the case of poultry heads, a beneficial impact of hydrothermal processing at the temperatures from 100°C to 175°C was confirmed. For poultry meat the preliminary thermohydrolysis brought about a decrease of methane fraction in the biogas evolved. The preliminary hydrothermal processing made it possible to meet the requirements of legal regulations for the hygienization of by-products of animal origin. The obtained results allowed us to identify conditions under which the methane fermentation was carried out and which ensured a high level of methanization.