Numerical Analysis of Stratified Rock Slope Stability Based on 3DEC

Wang, Zhi De; Jiang, Li Min; Xia, Yong; Pei, Yao Yao; Lin, Man Qing

doi:10.4028/www.scientific.net/amm.454.133

Cited by 3 publications

(3 citation statements)

References 1 publication

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“…This method considers the rock mass to be a combination of rigid or deformed blocks, which are separated by discontinuities such as fault, joint, and fissure, allowing the blocks to rotate or even separate from each other (33DEC Constitutive Models 2013). The macroscopic discrete element method has been widely used in geotechnical engineering as it is an ideal numerical method for analyzing the deformation and stability of jointed rock masses (Sheng et al 2011;Dehghan et al 2013;Wang et al 2013;Tan et al 2014).…”

Section: Setup Of the Huangnanbei Slope Modelmentioning

confidence: 99%

The analysis of slippage failure of the HuangNanBei slope under dry-wet cycles in the three gorges reservoir region, China

Huang

Zhang

Dai

et al. 2020

Geomatics, Natural Hazards and Risk

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The purpose of this paper is to study the sliding failure of the jointed rock slope caused by the degradation of rock mass mechanics under dry-wet cycles. Based on the mechanical parameters of reservoir limestone obtained under different numbers of dry-wet cycles, a discrete element approach was adopted to analyze the slippage failure mode of HuangNanBei slope in the Three Gorges Reservoir Region. The Barton-Bandis nonlinear strength criterion for discontinuities was used to improve the Mohr-Coulomb (M-C) sliding model, and the modified M-C sliding model could make the shear strength parameters of the discontinuities change with the stress state. Under the modified model, there was a tendency for disintegration between blocks in the process of slippage, which was more in line with the actual working conditions and proved the validity and necessity of this model. Furthermore, the slip rate increased with the increase of dry-wet cycles, and the increase trend had not slowed down after 30 dry-wet cycles. The cumulative displacement from 0 to 30 dry-wet cycles was obtained by changing the mechanical parameters of the discontinuities every 10 steps to simulate each dry-wet cycle. The pattern of the cumulative displacement curve was consistent with the slip curve of the 30th dry-wet cycle, which indicated that the degradation of the rock mass mechanics is irreversible. Consequently, strengthening the hydrofluctuation belt is of great significance for disaster prevention and control in the reservoir region.

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Section: Setup Of the Huangnanbei Slope Modelmentioning

confidence: 99%

The analysis of slippage failure of the HuangNanBei slope under dry-wet cycles in the three gorges reservoir region, China

Huang

Zhang

Dai

et al. 2020

Geomatics, Natural Hazards and Risk

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“…Wu et al [28] used the discrete element software 3DEC to capture the basic three-dimensional characteristics of the landslide and form a post-failure structure similar to that observed in the field. Wang et al [29] used 3DEC to numerically simulate the excavation of a rock slope of the Puli-Xuanwei Expressway in Yunnan Province. By comparing the rock slopes under different stratum angles, directions, rock characteristics, and thicknesses, they obtained the possible failure modes of the slope and the mutative regulation of safety factors under different conditions.…”

Section: Introductionmentioning

confidence: 99%

An Enhanced Discrete Element Modeling Method Considering Spatiotemporal Correlations for Investigating Deformations and Failures of Jointed Rock Slopes

2022

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The discrete element method (DEM) is commonly employed to analyze the deformations and failures of jointed rock slopes. However, when the iterative calculation process of the DEM modeling should be terminated is still unclear. To solve the above problem, in this paper, a discrete element modeling method based on the energy correlation coefficient is proposed to determine when the iterative calculation process could be terminated, and then applied the proposed method to analyze the deformations and failures of jointed rock slopes. Compared with the existing discrete element modeling method based on the displacement variation coefficient, the proposed method based on the energy correlation coefficient is much more applicable for jointed rock slopes. The main advantage of the proposed method is that there is no need to determine the position of the potential sliding surface, and the displacements of all blocks are no longer counted as statistics, but the spatiotemporal correlations between all blocks are considered. The effectiveness of the proposed method is verified by comparing with the existing method based on the displacement variation coefficient for an abbreviated jointed rock slope. Moreover, the proposed method is successfully applied to analyze a real-world jointed rock slope without an obvious potential sliding surface in which the existing method cannot work.

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“…The characteristics of fuzzy mathematical analysis method are considering objective fuzzy factors and the intermediary transition process during the essence changes happened. It reflects the intrinsic features of the objective things and the fuzzy attribute more better [6] . Wang Jia-Ding [7] has used fuzzy information analysis to evaluated the slope stability in Lanzhou as early as in 1990.…”

Section: Introductionmentioning

confidence: 99%

Application of Fuzzy Information Optimization Technology on Analysis of Loess Landslide Stability

Peng¹,

Ma²,

Wang³

et al. 2013

AMM

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The fuzzy information optimization method is applied to the loess landslide stability analysis. Based on the laboratory tests and field investigation, considering the influence of the five main factors such as cohesive force, internal friction angle, the landslide slope landslide, height and earthquake ground motion parameters of the loess landslide, the fuzzy information optimization method like information distribution, information focus and other methods were used to evaluate the stability of loess landslide. The results show that the result of assessment was in accord with the actual condition. The evaluation method is applicable to the loess region. Compared to the limit equilibrium method, it improves engineering economic benefits.

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Numerical Analysis of Stratified Rock Slope Stability Based on 3DEC

Cited by 3 publications

References 1 publication

The analysis of slippage failure of the HuangNanBei slope under dry-wet cycles in the three gorges reservoir region, China

The analysis of slippage failure of the HuangNanBei slope under dry-wet cycles in the three gorges reservoir region, China

An Enhanced Discrete Element Modeling Method Considering Spatiotemporal Correlations for Investigating Deformations and Failures of Jointed Rock Slopes

Application of Fuzzy Information Optimization Technology on Analysis of Loess Landslide Stability

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