Sarma-based key-group method for rock slope reliability analyses

Bafghi, A R Yarahmadi; Verdel, Thierry

doi:10.1002/nag.447

Cited by 15 publications

(3 citation statements)

References 19 publications

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“…These include the continuum methods (finite element method and the finite difference method), the discontinuum methods (distinct element and discontinuous deformation analysis), and finite-/discrete-element codes. In addition, the probabilistic analytical method is employed in [26,27] to find the rock slope potential failure key-group and estimate the probability of failure. It should be acknowledged that the slope stability probability classification proposed by Hack et al [27] does not require cohesion and friction as input.…”

Section: Previous Studiesmentioning

confidence: 99%

Stability charts for rock slopes based on the Hoek–Brown failure criterion

Merifield

Lyamin

2008

International Journal of Rock Mechanics and Mining Sciences

195

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Section: Previous Studiesmentioning

confidence: 99%

Stability charts for rock slopes based on the Hoek–Brown failure criterion

Merifield

Lyamin

2008

International Journal of Rock Mechanics and Mining Sciences

195

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“…Bafghi et al [7] proposes an extension to the key-block method, which combines not only individual key-blocks but also groups of collapsable blocks into a progressive analysis of the stability of discontinuous rock slopes. From a more concise process, Zhu et al [8] derived the implicit expression for the factor of safety, the explicit expressions of the critical seismic coefficient and the critical reinforcing load factor, respectively.…”

Section: Introductionmentioning

confidence: 99%

Stability Evolution of a Large Rock Block Revealed in the Excavation Process of the Left Slope of Jinping-I Hydropower Station Based on the Proposed Sarma's Method

Chen¹,

Sun²,

Zheng³

2015

Proceedings of the 2015 International Conference on Architectural, Civil and Hydraulics Engineering

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Abstract. There is a latent large block near the dam abutment of Jinping-I hydropower station, the stability of which is very important in the excavation process. As we know, Sarma's method is able to evaluate the stability of rock slopes with complex structural planes, because it takes into account the mobilization of internal strength of potential landslides. In the presence of multiple rock layers, however, no unified way is available to calculate the total strength on the slice interface, although in most cases the equivalent strength parameters are taken as the weighted averages of strength parameters of all layers. From the assumption that the normal pressure along the slice interface takes on a triangular distribution, we derive the equivalent strength parameters of the slice interface. Moreover, we discuss the influence of different selections of equivalent strength parameters of the slice interface on the factor of safety of a rock slope from a hydropower station in construction, with the conclusion that the difference might be appreciable. At last, based on the proposed procedure the stability evolution of the large rock block in excavation process is discussed. Its stability is increased before elevation 1840 m is reached because the upper portions of the blocks are removed, which help slide. After that, however, the stability is decreased gradually because the lower anti-sliding portions are removed little by little, which help stabilize the slip bodies. After the sliding body is wholly revealed, the factor of safety is 2.83, which is higher than that of sliding body corresponds to the dam crest and lower than that of the maximum in excavation process.

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“…Bafghi and Verdel [25] presented a new method: the Sarma-based key-group method for rock slope reliability analysis.…”

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confidence: 99%

Stability and Support Analysis of Coverage Rock-Soil Aggregate of Longhuguan Landslide

Sun

Fu-hua

2017

Pol. J. Environ. Stud.

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Landslides have an effect on lives and properties in many different countries [1], making control of the effects of natural hazards -especially landslides -an urgent problem [2]. Landslide can cause secondary damage, rockslide-dammed lakes [3][4], tsunamis [5][6][7], and block roads [8]. There are so many factors leading to landslides, such as hydrology [9], earthquakes, top loads, pedology, different layers, geomorphy [10], and geology-changing climate [11].A slope consists of soil and rock. Previous research treated geomaterials as homogeneous materials and did not separate soils and rock. Different geomaterials have different affects on slope stability. Mahmood and Kim [12] analyzed the effect of soil type on matric suction and stability of unsaturated slope, using the modified MohrCoulomb failure criterion and the saturated-unsaturated seepage model, and drew upon the fact that saturatedunsaturated hydraulic conductivity and matric suction head affect the matric suction results. Tiwari and Ajmera Pol. J. Environ. Stud. Vol. 26, No. 6 (2017), 2747-2757 AbstractRock-soil aggregate landslides are distributed all over the world and have done great harm to transportation networks, buildings, personal safety, and city construction. Although landslide studies usually focus on the slope of the single homogeneous material, few slopes are composed of or covered by various complicated geomaterials. This paper proposes a calculation model of the slope covered by rock-soil aggregate and analyzes Longhuguan landslide in Guangxi, China, considering rainfall. Fully considering the weak surface, a support design plan is given.The unbonded cable is taken to support the landslide, the concrete beams are adopted on the angle turning point of the surface, and the slide-resistant piles are used to jointly support the front edge of the slope. Top fissures are blocked and landslide drainage measures are taken. The displacement monitoring proves that the support is effective. This study can provide many references for landslide support and analysis covered by rock-soil aggregate.

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Sarma-based key-group method for rock slope reliability analyses

Cited by 15 publications

References 19 publications

Stability charts for rock slopes based on the Hoek–Brown failure criterion

Stability charts for rock slopes based on the Hoek–Brown failure criterion

Stability Evolution of a Large Rock Block Revealed in the Excavation Process of the Left Slope of Jinping-I Hydropower Station Based on the Proposed Sarma's Method

Stability and Support Analysis of Coverage Rock-Soil Aggregate of Longhuguan Landslide

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