Two-dimensional slope stability analysis by limit equilibrium and strength reduction methods

Cheng, Yung Ming; Länsivaara, Tim; Wei, W. B.

doi:10.1016/j.compgeo.2006.10.011

Cited by 578 publications

(236 citation statements)

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“…For slope stability analysis, the limit equilibrium method (LEM) is widely used by engineers and researchers, and this is a traditional and well-established method. The finite element method (in the form of the strength reduction method, SRM) has become popular recently for the analysis of slopes, but there are also many practical problems to the SRM for some complicated problems, which have been discussed by Cheng et al (2007).…”

Section: Introductionmentioning

confidence: 99%

Laboratory and 3-D distinct element analysis of the failure mechanism of a slope under external surcharge

Ming

2015

Nat. Hazards Earth Syst. Sci.

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Abstract. Landslide is a major disaster resulting in considerable loss of human lives and property damages in hilly terrain in Hong Kong, China and many other countries. The factor of safety and the critical slip surface for slope stabilization are the main considerations for slope stability analysis in the past, while the detailed post-failure conditions of the slopes have not been considered in sufficient detail. There is however increasing interest in the consequences after the initiation of failure that includes the development and propagation of the failure surfaces, the amount of failed mass and runoff and the affected region. To assess the development of slope failure in more detail and to consider the potential danger of slopes after failure has initiated, the slope stability problem under external surcharge is analyzed by the distinct element method (DEM) and a laboratory model test in the present research. A more refined study about the development of failure, microcosmic failure mechanisms and the post-failure mechanisms of slopes will be carried out. The numerical modeling method and the various findings from the present work can provide an alternate method of analysis of slope failure, which can give additional information not available from the classical methods of analysis.

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Section: Introductionmentioning

confidence: 99%

Laboratory and 3-D distinct element analysis of the failure mechanism of a slope under external surcharge

Ming

2015

Nat. Hazards Earth Syst. Sci.

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“…1, the total head is 10 m for the top ‰ow line, and the total head diŠerence for each ‰ow line is 1 m. The density, elastic modulus and Poisson ratio of the soil were kept at 20 kN/m 3 , 14 MPa and 0.3 respectively in the analysis. Cheng et al (2007) have demonstrated that the uses of these elastic properties in SRM are not important, and the factors of safety using diŠerent elastic properties are virtually not aŠected by these parameters. From the SRM analyses, the regions where the shear strain concentrate are identiˆed and the failure surface can be approximately obtained by the maximum shear strain distribution, as shown in Figs.…”

Section: Stability Analysis For a Simple Slope With Seepage Flowmentioning

confidence: 99%

“…In this respect, the seepage analysis and the stability analysis are carried out independently. For the dilation angle of the soil, Cheng et al (2007) have demonstrated that it is not critical for most of the problems, and the eŠect of the dilation angle is usually less than 5z except for isolated problems. Since the main conclusion from the present study is highly unlikely to be aŠected by the dilation angle, the authors have adopted a dilation angle of 0 in the present study.…”

Section: Stability Analysis For a Simple Slope With Seepage Flowmentioning

confidence: 99%

Stability Analysis of Slope with Water Flow by Strength Reduction Method

Wei¹,

Cheng²

2010

Soils and Foundations

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“…Reference is often made to the limit equilibrium methods (LEM) in order to develop stability analysis (Brunsden, 1979;Cheng et al, 2007;Cheng & Lau, 2008;Hammouri et al, 2008). This kind of method is able to resolve the static conditions for a given breaking mechanism, such as sliding along a composite or curvilinear surface (Hoek & Bray, 1981).…”

Section: Formation and Classification Of The Ravanetosmentioning

confidence: 99%

Static and dynamic analyses of the stability of mining wastes (Ravaneti) in the Carrara marble area (Apuan Alps, Italy) / Analiza statyczna i dynamiczna stabilności hałd odpadów górniczych w regionie wydobycia marmurów Carrara (Alpy Apuańskie, Italia)

Oreste¹,

Soldano²

2012

Archives of Mining Sciences

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The problem of the stability of "ravanetos" (debris piles of mining waste material extracted from the Apuan Alps, Italy) is very relevant, because of the consequences a landslide would have on the people and the existing civil infrastructures throughout the territory.In this work, the stability of two ravanetos that can be considered as representative of those in the Carrara area has been studied: the Polvaccio ravaneto, a recent type of debris pile and the Torrione-Tecchione, an old debris pile at present undergoing re-naturalisation.The study using the LEM (Limit Equilibrium Method) in a static and pseudo-static field, has made it possible to first carry out a back-analysis to define the most probable apparent cohesion and friction angle values of the material that makes up the ravanetos. Subsequently, it was possible to determine the intensity of the seismic wave that would be able to lead the two ravanetos to limit stability conditions and to determine the probability of such a seismic wave occurring in the next 50 years.A more accurate analysis, carried out with a numerical method in the dynamic field, of the most critical condition (the Polvaccio ravaneto) has led to more conservative results (higher safety factors) than those obtained with the LEM. This result allows us to reveal how the LEM can be considered a cautionary instrument to judge the stability of debris piles during a seismic event and that the likelihood of a landslide occurring in the two studied representative ravanetos over the next 50 years is very slim.Keywords: mining waste disposal site, slope stability, safety factor, dynamic analysis, numerical calculation, effect of a seismic event.Zagadnienie stabilności hałd odpadów górniczych w regionie Alp Apuańskich, Italia) jest niezmiernie ważne z uwagi na skutki jakie ewentualne osunięcia gruntu mogłyby mieć dla ludności oraz budowli znajdujących się na tych terenach.W pracy tej rozpatrywano zagadnienie stabilności dwóch hałd odpadów, które uznać można za reprezentatywne dla regionu Carrera: hałda w Polvaccio (hałda nowszego typu) oraz Torrione-Tecchione, stara hałda, obecnie poddawana procesom rekultywacji. 668W badaniach zastosowano metodę równowagi granicznej (LEM) w polu statycznym i pseudo-statycznym. Metoda ta umożliwia w pierwszym rzędzie przeprowadzenie analizy wstecznej w celu określenia najbardziej prawdopodobnego pozornego kąta kohezji i tarcia dla materiału hałdy. Następnie określono intensywność fali sejsmicznej, w wyniku oddziaływania której hałdy mogłyby utracić stabilność a także obliczono prawdopodobieństwa wystąpienia takiej fali sejsmicznej w ciągu najbliższych 50 lat.Bardziej szczegółowa analiza warunków krytycznych, wykonana przy pomocy metod numerycznych w polu dynamicznym, dała bardziej ostrożne wyniki (wyższe współczynniki bezpieczeństwa) niż te uzyskane przy pomocy metody równowagi granicznej. Wyniki badań sugerują, że metoda równowagi granicznej stanowi ostrożne narzędzie do określania stabilności hałd odpadów w trakcie zjawisk sejsmicznych. Pokazano także, że praw...

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Two-dimensional slope stability analysis by limit equilibrium and strength reduction methods

Cited by 578 publications

References 11 publications

Laboratory and 3-D distinct element analysis of the failure mechanism of a slope under external surcharge

Laboratory and 3-D distinct element analysis of the failure mechanism of a slope under external surcharge

Stability Analysis of Slope with Water Flow by Strength Reduction Method

Static and dynamic analyses of the stability of mining wastes (Ravaneti) in the Carrara marble area (Apuan Alps, Italy) / Analiza statyczna i dynamiczna stabilności hałd odpadów górniczych w regionie wydobycia marmurów Carrara (Alpy Apuańskie, Italia)

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