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Case studies on Q-slope method use for slope stability analyses

Komurlu Eren

Studia Geotechnica et Mechanica

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2022

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Vol. 44, nr 3

190--197

EN

The use of the Q-slope value is a relatively new approach for the stability investigations of rock slopes. In this study, four different slopes in Giresun and Ordu cities of Turkey were investigated to assess whether the Q-slope approach is usable for varying slope heights, or not. A back analysis was carried out for a landslide in a case study quarry located in Kovanlik municipality of Giresun city. Carrying out detailed investigations on the geotechnical drill cores and the field studies, the Q-slope value of the rock mass of the Kovanlik quarry was determined as 0.58. According to the Q-slope approach, the slope which had a landslide under the case of 49° general slope angle and 225 m height should have been stable at a general slope angle of 59°. It has been found that the Q-slope approach is not favorable for a high slope with the height of 225 m. Two roadway excavations with steep slope angles and low heights smaller than 25 m were also investigated within this study. According to the Q-slope value, the roadway slopes which are stable for more than 3 years are estimated to be unstable. Therefore, the Q-slope approach was found also misleading for slopes with low heights like those under 25 m. On the other hand, the Q-slope method usability is confirmed obtaining parallel results with the observations from another case study slope with a height of 78 m. Although it has become a popular empirical method in the recent years, it is recommended to revise the Q-slope approach or limit its use depending on the slope height parameter.

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Wybrane metody empiryczne w naukach o bezpieczeństwie

Górska K., Rożej A.

Bezpieczeństwo i Technika Pożarnicza

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2013

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Nr 2

11--16

PL

Bezpieczeństwo stanowi podstawową potrzebę człowieka. Jest to stan, który daje poczucie pewności oraz gwarancję jego zachowania, a także szansę do doskonalenia. W związku z tym zasadne jest prowadzenie badań w celu jego zagwarantowania. Dlatego też artykuł został poświęcony charakterystyce wybranych metod empirycznych, które są stosowane w naukach o bezpieczeństwie. Dzięki nim istnieje możliwość badania zachodzących procesów w celu wyciągnięcia właściwych wniosków, aby móc następnie zapewnić bezpieczne egzystowanie wszelkim podmiotom. W artykule scharakteryzowano takie metody badawcze jak obserwacja, eksperyment, metody ankietowania, wywiad, metody eksperckie oraz metoda modelowania. Uzupełnienie metod teoretycznych metodami empirycznymi stwarza szansę uzyskania wiarygodnych danych, które mogą być podstawą do unikania ryzykownych sytuacji zagrażających stabilizacji.

EN

Safety is a basic human need. It is a condition, which gives a sense of confidence and assurance in behaviour and also provides an opportunity for improvement. Therefore, it is appropriate to conduct research in this area with the aim of securing such a condition. For this reason the article describes characteristics of selected empirical methods, which are applied in research concerning safety. Such methods facilitate examination of processes with the aim of drawing conclusions and ultimately securing a safe existence for all. The article describes research methods such as: observation, experiments, interviews, expert methods and modelling. Supplementing theory with empirical methods creates an opportunity for securing reliable data, which can provide the basis for avoiding risk situations, which threaten stability.

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Empiryczne metody pomiaru reologicznych właściwości artykułów żywnościowych

Balejko J.A.

LAB Laboratoria, Aparatura, Badania

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2002

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R. 7, nr 5

18-21

PL

Większość metod instrumentalnych w ocenie własności reologicznych artykułów żywnościowych bazuje na metodach mechanicznych, polegających na mierzeniu siły reakcji badanej próbki na obciążenie zewnętrzne. Testy empiryczne określają parametry często słabo zdefiniowane, które jak wykazuje doświadczenie, są powiązane ze strukturalną jakością. Przeprowadza się je na urządzeniach, które w większości przypadków pozwalają. na określenie zaledwie jednej z wielu cech charakterystycznych danego artykułu żywnościowego.

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Determination of elastic moduli of sands from triaxial compression test

Świdziński W.

Archives of Hydro-Engineering and Environmental Mechanics

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2000

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Vol. 47, nr 1-4

51-73

EN

In the paper an empirical method of determination of elastic constants of non-cohesive soils on the basis of the experimental data from conventional triaxial com-pression tests, is proposed. The method is based on a new interpretation of triaxial tests during which samples of dry sands are subjected to several cycles of loading and unloading. The test results of all strain and stress components measured in the experiment are presented in terms of deviatoric stress versus deviatoric strain and mean effective pressure versus volumetric strain diagrams. It is assumed that after any stress reversals the material exhibits purely elastic response that obeys Hooke's linear law. Elastic moduli are determined from the first stage of unloading, which is different from the other methods commonly accepted in soil mechanics. The main advantage of the method proposed was isolating linear behaviour of the material that corresponds to elastic response and including in the analysis the lateral deform-ation of a sample. In the paper several examples of test results for various confining pressures and initial void ratios are presented and analysed. Comparison with other methods is made and discussed.