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Wyświetlanie 1-4 z 4
Tytuł:
Experimental Investigation of Skirted Foundation in Sand Subjected to Rapid Uplift
Autorzy:
Kulczykowski, Marek
Powiązania:
https://bibliotekanauki.pl/articles/1837763.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
skirted foundation
suction caisson
pullout resistance
rapid uplift
model investigations
Opis:
This paper reports results from 1g model tests carried out under single gravity on a skirted foundation installed in sand and subjected to a rapid uplifting force. The effects of displacement rates ranging from 5 mm/s to 450 mm/s on the ultimate capacity, suction pressure inside the skirt compartment, and time of extraction were investigated. Test results indicate that the displacement rate significantly affected the magnitude of uplift resistance, as well as the magnitude of suction under the foundation lid, but had little effect on the relationship between stress and the displacement of the foundation. The shapes of the uplift capacity-displacement curve and the suction-displacement curve were similar for all experimental displacement rates.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2020, 67, 1-4; 17-34
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the Effect of Sidewall Friction in Reinforced Soil Retaining Wall Experiments
Autorzy:
Kulczykowski, Marek
Powiązania:
https://bibliotekanauki.pl/articles/2097763.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
sidewall friction
reinforced soil
model investigations
PIV analysis
Opis:
Asimple approach to estimate sidewall friction in reinforced soil model experiments conducted in parallel-sided test boxes with unlubricated walls is proposed. Analytical solutions are developed for reinforced soil slopes and retaining walls subjected to self-weight or external loading. It turns out that the frictional effect depends on the shape of the failure zone and the value of friction coefficient between soil and a sidewall material. The theoretical predictions were verified in laboratory experiments in a test box with lubricated and unlubricated sidewalls. It was shown that the method can be used to estimate sidewall friction not only under failure conditions, but also under all stages of surcharging prior to failure.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2021, 68, 2; 137--158
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Współczesne procesy osuwiskowe na klifie w Jastrzębiej Górze
Present-day landslide processes on the cliff in Jastrzębia Góra
Autorzy:
Zabuski, Lesław
Kulczykowski, Marek
Powiązania:
https://bibliotekanauki.pl/articles/2076065.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
osuwisko
klif
przemieszczenie
obliczenia stateczności
landslide
cliff
displacement
stability calculations
Opis:
The paper describes the geomorphological and geological structure of the cliff Baltic bank in Jastrzębia Góra. The detailed description and analysis of the landslide developed in the selected cross-section of the cliff is provided. Extensive complex investigations involving multiple techniques are described. These methods include the borehole drilling and inspection of the soils composing the slope, laboratory tests of the shear strength parameters by the triaxial compression method, slope stability calculations basing on the finite difference method and inclinometric measurements of the displacements in the borehole performed on the slope. The results prove that the extent of the landslide is limited to the upper part of the slope. The stability factor lower than 1.0 and the continuous displacements measured in the borehole indicate the recent cliff instability. Therefore the works for slope stabilization are strongly recommended.
Źródło:
Przegląd Geologiczny; 2020, 68, 9; 682--690
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of the Causes of a Landslide in Koronowo (Polish Lowlands)
Autorzy:
Zabuski, Lesław
Kulczykowski, Marek
Świdziński, Waldemar
Powiązania:
https://bibliotekanauki.pl/articles/241015.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
landslide causes
landslide development
atmospheric conditions
faulty construction
Opis:
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.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2019, 66, 1-2; 47-56
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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