Effective failure modes and stability of slopes in rock mass with two discontinuity sets

Aydan, Ömer; Shimizu, Yasuhiro; Ichikawa, Yasuaki

doi:10.1016/0148-9062(90)95253-w

Cited by 9 publications

(20 citation statements)

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“…The development of the slide-topple mechanism is attributed to the fully persistent nature of the rear release (toppling) discontinuity set which can act as a single column when the rock mass is confined and/ or the block size is small enough relative to the size of the slope. This phenomenon had previously been described by Aydan et al (1989) for base friction physical models with fully persistent discontinuities. These findings therefore suggest that classification schemes such as proposed by Ashby (1971) and toppling nomograms (Choquet and Tanon 1985) should only be applied when investigating the stability of an individual rock block, a rock mass with discontinuities of limited persistence relative to the size of the slope of interest or where the blocks in the rock mass are relatively large compared to the slope of interest.…”

Section: Failure Mechanismsmentioning

confidence: 95%

Evaluating Kinematic Controls on Planar Translational Slope Failure Mechanisms Using Three-Dimensional Distinct Element Modelling

Brideau

Stead

2012

Geotech Geol Eng

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This paper investigates the importance of kinematic release mechanisms on planar translational slope failure using three-dimensional distinct element codes. The importance of the dip and dip direction of the rear, basal and lateral release surfaces and their influence on failure mechanism, dilation, and the development of step-path failures is illustrated. The three-dimensional block shape and volume of the unstable rock masses simulated with the different discontinuity set geometries are characterized. Two assumed three-dimensional slope models are investigated in order to assess the importance of varying kinematic confinement/release mechanisms. These two assumed boundary conditions are shown to be critical in the development of asymmetrical rock mass deformation patterns. Scale effects due to the block size and discontinuity persistence are shown to control the calculated displacement and failure mechanisms. The numerical modelling results are also demonstrated to be sensitive to the assumed normal and shear stiffness of the discontinuities. The influence of the factors investigated on the failure of a single rock block versus a rock mass are compared and discussed.

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Section: Failure Mechanismsmentioning

confidence: 95%

Evaluating Kinematic Controls on Planar Translational Slope Failure Mechanisms Using Three-Dimensional Distinct Element Modelling

Brideau

Stead

2012

Geotech Geol Eng

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“…The most important parameter in a toppling failure is the point where the inter-column forces act. Some researchers suggested the following assumptions in regards to the determination of the point of action of the inter-column forces (Goodman and Bray 1976;Aydan et al 1989;Aydan and Kawamoto 1992):…”

Section: Mechanism Of Block-flexure Toppling Failurementioning

confidence: 99%

“…c Block-flexure such failures in the form of design charts and computer codes (Hoek and Bray 1977;Zanbak 1983;Choquet and Tanon 1985;Keith Turner and Schuster 1996). After 1986, based on Goodman and Bray's classification, a lot of research was carried out on blocky and flexural toppling failures (Wyllie 1980;Aydan et al 1989;Aydan and Kawamoto 1992;Adhikary et al 1997;Bobet 1999;Sageseta et al 2001;Adhikary and Guo 2002;Amini 2009;Amini el al. 2009;Aydan and Amini 2009;Brideau and Stead 2009;Majdi and Amini 2011).…”

Section: Parameters Dmentioning

confidence: 99%

“…Sagaseta (1986) analyzed a single column with potential for toppling-sliding failure on the basis of the dynamic equation of equilibrium. The mechanism and conditions of a single column and rock slopes having the potential for combined sliding and toppling failures were investigated and a complete solution for the analysis of such a case was presented by Aydan et al (1989). On the basis of this approach, the failure may be classified into the following cases:…”

Section: Analysis Of Block-flexure Toppling Failurementioning

confidence: 99%

“…Similarly, on the basis of the dynamic equation of equilibrium, the magnitude of inter-column forces in such a case can be computed as follows (Aydan et al 1989):…”

Section: Analysis Of Block-flexure Toppling Failurementioning

confidence: 99%

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Stability Analysis of Rock Slopes Against Block-Flexure Toppling Failure

2012

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Block-flexure is the most common type of toppling failure in rock slopes. In this case, some rock blocks fail due to tensile bending stresses and some overturn under their own weights. In this paper, first, a literature review of toppling failures is summarized. Then, a theoretical model is proposed for rock slopes with a potential for block-flexure toppling instability. Next, a new analytical approach is presented for the stability analysis of such slopes. Finally, a special computer code is developed for a quick stability assessment of the failures based on the proposed method. This code receives the rock slope parameters from the user as the input data and predicts its stability, along with the corresponding factor of safety against the failure, as the output. In addition, two case studies are used for practical verification of the proposed approach and the corresponding computer code as well.

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Historical earthquakes that damaged Hierapolis and Laodikeia antique cities and their implications for earthquake potential of Denizli basin in western Turkey

Kumsar

Aydan

Şimşek

et al. 2015

Bull Eng Geol Environ

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Denizli basin is situated at the junction of NW-SE trending Gediz Graben and E-W trending Büyük Menderes Graben in the eastern part of the western Anadolu (Anatolian) extensional province in western Turkey, which has been home to many civilizations during its long history and therefore has ruins of many antique cities and settlements. Most of antique cities were destroyed by strong earthquakes that occurred in ancient times. Strong historical earthquakes in Denizli basin caused heavy damage to antique cities in the region, namely, Hierapolis in Pamukkale, Laodikeia in Denizli city center, colassae in Honaz, Attuda in Babadag and Tripolis in Buldan. A strong earthquake occurred in the early seventh century AD in Lykos (Ç ürüksu) Valley of the Denizli area, heavily damaging the antique cities in the region and causing people to abandon their cities. Recent archaeological excavations in Hierapolis and Laodikeia clearly revealed many relics associated with the early seventh century AD earthquake. For example, the collapse directions of columns and walls are mainly towards the NE or SW. The surface ruptures in the Hierapolis antique city area in the Pamukkale area prove that Pamukkale Fault is the main active fault producing strong earthquakes in the region, and severe damage is induced by earthquakes having a magnitude 6.5 or more. However, the largest earthquake could be up to 7.1 in the Denizli Basin.

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Effective failure modes and stability of slopes in rock mass with two discontinuity sets

Cited by 9 publications

References 0 publications

Evaluating Kinematic Controls on Planar Translational Slope Failure Mechanisms Using Three-Dimensional Distinct Element Modelling

Evaluating Kinematic Controls on Planar Translational Slope Failure Mechanisms Using Three-Dimensional Distinct Element Modelling

Stability Analysis of Rock Slopes Against Block-Flexure Toppling Failure

Historical earthquakes that damaged Hierapolis and Laodikeia antique cities and their implications for earthquake potential of Denizli basin in western Turkey

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