The evaluation of three-dimensional effects on slope stability by the strength reduction method

Keleşoğlu, M. Kubilay

doi:10.1007/s12205-015-0686-4

Cited by 43 publications

(14 citation statements)

References 18 publications

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“…For example, Figure 7 shows the deformation results of convex slopes from this study and from [9], where both models have similar deformation pattern. The behavior of the results from re-modeled case of [10] also similar with the results from [12] and [13].…”

Section: Validation Of Behaviour Of 2d and 3d Slope Stability Analysessupporting

confidence: 69%

Comparison of 2D and 3D Stability Analyses for Natural Slope

Bahsan¹,

Fakhriyyanti

2018

IJET

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Slope stability analyses are performed mostly as a two-dimensional (2D) section under the assumption of plane strain conditions, without much consideration to the impact of three-dimensional (3D) shapes. For natural slopes that have the complexities of slope surfaces, 3D modeling may also be considered since it can represent the more realistic geometry of the slope. However, previous studies show that the factor of safety (FS) as a result of 3D analyses mostly overestimated the FS from 2D analyses. This may lead to a long discussion on whether the 3D analysis is still applicable for the natural slopes, and could it represent the same results as the 2D analysis. This study was conducted using the finite element method for calculating the 2D and 3D FS of Pasir Muncang natural slope in order to observe differences of FS resulted from both analyses. A comparison of the FS from the 2D and 3D analyses, and also verification of sensitivity on several factors that impact the 2D and 3D models have been performed. The results of this study has indicated that some factors such as soil parameters, contour interval, and mesh coarseness greatly affect the results of the 2D and 3D calculations. Having carefully selected the aforementioned factors as the inputs for calculations, the difference between the FS values of 3D and 2D analyses becomes smaller. The final result of FS for this case study from the 3D analysis was still higher than the one from the 2D analysis, with the ratio of FS from 3D to FS from 2D was 1.44. It can be inferred that the use of 3D analyses needs more accurate data selections compared to the 2D analyses.

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Section: Validation Of Behaviour Of 2d and 3d Slope Stability Analysessupporting

confidence: 69%

Comparison of 2D and 3D Stability Analyses for Natural Slope

Bahsan¹,

Fakhriyyanti

2018

IJET

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“…In stability analysis in the finite element method, the strength reduction method [26][27][28] can well obtain the safety factor, which is closely connected with previous evaluation methods. Krabbenhoft and Lyamin [28] gave an example about the strength reduction analysis by using finite-element limit analysis, and detect infeasibility based on the ability of interior-point methods.…”

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confidence: 82%

“…The cohesion can be expressed as C =164.01e After a long heavy rain, the sliding surface has great water content and is even in saturation state, as shown in Figs 9-10, which greatly decreases slide-resistant parameters. The finite element strength reduction method [27,[49][50][51][52] is used to analyze according to slope stability. The calculated slope stability security coefficient is 0.83, which is less than 1.…”

Section: Parameters Of the Rubble Mass And Rockmentioning

confidence: 99%

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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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“…Consequently, a berm width of 10 m and foundation layer thickness of 10 m was adopted for this study to ensure that the failure surfaces developed remain within the slope boundary. It should be noted that other researchers while analysing the stability of unreinforced and reinforced slopes, by numerical modelling, utilized berm width and foundation thickness ranging from 5 to 15 m [15][16][17][18].…”

Section: Slope Geometry and Foundation Detailsmentioning

confidence: 99%

Stability analysis and design charts for a sandy soil slope supporting an embedded strip footing

Baah-Frempong

Shukla

2018

Geo-Engineering

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In several field situations, especially in the hilly terrains, the construction of footings on slopes becomes essential. The factor of safety of a slope supporting a loaded footing on the crest is dependent on the position of the footing from the crest edge. Most studies in the past have focused on analysing the bearing capacity and settlement behaviour of a footing resting on a slope crest, but foundations in most infrastructure projects are usually built at some depth below the ground surface. Therefore, the availability of some form of design charts for determining the factor of safety of a slope supporting an embedded footing will be highly useful for the practising engineers. In the current work, the finite element analysis of a sandy soil slope supporting an embedded footing was carried out using the Plaxis 2D, a finite element-based commercial software, in order to examine the effect of slope geometry, soil properties, and footing locations on the stability of slope in terms of factor of safety. The results of the analysis show that the factor of safety of the slope increases with an increase in the footing edge distance, footing depth and soil relative density, but it decreases with an increase in the slope angle and applied pressure on the footing. Some design charts have been developed along with an illustrative example to explain how these charts can be used by the practising engineers.

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The evaluation of three-dimensional effects on slope stability by the strength reduction method

Cited by 43 publications

References 18 publications

Comparison of 2D and 3D Stability Analyses for Natural Slope

Comparison of 2D and 3D Stability Analyses for Natural Slope

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

Stability analysis and design charts for a sandy soil slope supporting an embedded strip footing

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