Wyniki wyszukiwania - BazTech

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Influence of soil parameters changes on the bearing capacity of soil

Harabinová S., Kotrasová K.

Roczniki Inżynierii Budowlanej

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2017

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z. 17

85--90

EN

The strength of soil is a key parameter in designing foundations and other earth structures. In shallow foundation design, the capacity of the foundation to support footing load is dependent on the soil’s bearing capacity which is a function of its strength parameters. According to [4], bearing capacity is the maximum pressure that the soil can support at foundation level without failure. Proper interpretation of specific shear strength parameters of clay and the application of this case to bearing capacity problems was presented and reviewed in this paper. The influence of the shear strength parameters of subsoil on its bearing capacity are very important, especially, when changing the angle of internal friction. The results of calculations for low plastic clay subsoil, shown in the work, illustrate exemplary how a level of its bearing capacity can be determined with significant errors when using incorrect shear parameters of soil.

2

Stability conditions of the Vistula Valley attained by a multivariate approach – a case study from the Warsaw Southern Ring Road

Kaczmarek Ł., Dobak P.

Geologos

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2015

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Vol. 21, No. 4

249--260

EN

Localised landslide activity has been observed in the area of the plateau slope analysed, in the vicinity of the planned Warsaw Southern Ring Road. Using calculation models quantitative and qualitative evaluations of the impact of natural and anthropogenic load factors on slope stability (and hence, safety) are made. The present paper defines six stages of slope stability analysis, leading to an indication of optimum slope design in relation to the development planned. The proposed procedure produces a ranking of factors that affect slope stability. In the engineering geological conditions under consideration, the greatest factors impacting degradation and failure of slope stability are changes in soil strength due to local, periodic yielding and the presence of dynamic loads generated by intensification of road traffic. Calculation models were used to assess the impact of destabilisation factors and to obtain mutual equivalence with 3D-visualisation relations. Based on this methodology, various scenarios dedicated to specific engineering geological conditions can be developed and rapid stability evaluations of changing slope loads can be performed.

3

Wpływ stabilizacji mieszaniny popiołowo-żużlowej cementem na jej wytrzymałość na ścinanie

Gruchot A., Pacławska J.

Przegląd Komunikacyjny

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2012

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Nr 9

33-35

PL

W pracy przedstawiono wyniki badań parametrów wytrzymałości na ścinanie mieszaniny popiołowo-żużlowej pobranej ze składowiska Elektrowni "Skawina". Badania zostały przeprowadzone na mieszaninie z 3 i 6% dodatkiem stabilizatora w postaci cementu portlandzkiego klasy 32,5R. W badaniach przyjęto 7 i 28 dobowy czas pielęgnacji powietrzno-wodnej próbek oraz pielęgnację z 3 i 14 cyklami zamrażanie-odmrażanie. Uzyskano wyższe wartości kąta tarcia wewnętrznego i spójności w stosunku do mieszaniny bez dodatku cementu. Czas, rodzaj pielęgnacji próbek, jak również dodatek spoiwa miały istotne znaczenie na uzyskane wartości parametrów wytrzymałości na ścinanie.

EN

The paper presents the results of tests of the shear strength parameters of an ash-slag mixture taken from the Power Plant "Skawina" dumping site. The mixture with 3 and 6% addition of stabiliser, which was the Portland cement class 32.5R, was used for the tests. The samples were treated with air and water for 7 and 28 days and subjected to 3 and 14 cycles of freezing and thawing. There were obtained bigger values of the angle of internal friction and cohesion in relation to the mixture without the cement addition. The time, kind of the samples treatment as well as the binder addition significantly influenced the obtained values of the shear strength parameters.