Slope stability assessment using both empirical and numerical methods: a case study

Salmi, Ebrahim Fathi; Hosseinzadeh, Saeed

doi:10.1007/s10064-013-0565-5

Cited by 32 publications

(10 citation statements)

References 27 publications

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“…Castro-Filgueira et al (2020) used three-dimensional particle flow code (PFC3D) to study the triaxial test simulation of complete and cracked granite and calibrated the accuracy of the parameters. Salmi and Hosseinzadeh (2015) used empirical and numerical methods to jointly evaluate the stability of slopes. Based on the fracture mechanics theory, Chen et al (2016) used the PFC2D method to evaluate the stability of crack propagation in a single dangerous rock.…”

Section: Introductionmentioning

confidence: 99%

Earthquake Dynamic Failure Mechanism of Dangerous Rock Based on Dynamics and PFC3D

Tian

Li³

et al. 2021

Front. Earth Sci.

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The dynamic failure mechanism of horizontally layered dangerous rock during earthquakes is complex and only few studies have addressed the combination of particle flow code (PFC) meso-level failure mechanism and mechanical analysis. Based on fracture mechanics and material mechanics we establish a calculation method for the interlayer load and stability coefficient of horizontal layered dangerous rock during strong earthquakes. The method was applied for calculating the stability of a horizontally layered dangerous slope along a highway in the Sichuan Province (China) during earthquakes as a case study. Using a 3D particle flow simulation technology, a PFC3D model of horizontal layered dangerous rock was established. Its dynamic stability, failure mode and Hilbert-Huang 3D time-frequency characteristics are analyzed, and the results of the simulation are largely consistent with the time of the dangerous rock failure as estimated by our new calculation method. Our study documents that as the seismic acceleration gradually increases, the stability coefficient of the rock block fluctuates more violently and the stability coefficient gradually decreases. The stability coefficient of the rock block decreases fastest between 5 and 6 s and the reduction in the stability coefficient is between 0.12 and 0.25. Before the seismic acceleration reaches the maximum, the dangerous rock blocks on the two main controlling structures collapse and get destroyed. 25 s after the earthquake, the failure mode of the dangerous rock is collapse-slip-rotation. We show that earthquakes with frequencies of 0–10 and 250 Hz have the strongest destructive effect on the stability of the horizontally layered dangerous rocks.

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Section: Introductionmentioning

confidence: 99%

Earthquake Dynamic Failure Mechanism of Dangerous Rock Based on Dynamics and PFC3D

Tian

Li³

et al. 2021

Front. Earth Sci.

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“…For example, the overall displacements were investigated, and vector graphics of the overall displacements were plotted. Shen et al [32], Wang et al [33], and Salmi et al [34] suggested that obvious changes in vector graphics could indicate that a slope has been deformed. Although the method is rational, it is only applicable to simple slopes.…”

Section: Introductionmentioning

confidence: 99%

An Energy-Based Discrete Element Modeling Method Coupled with Time-Series Analysis for Investigating Deformations and Failures of Jointed Rock Slopes

Zhang

Mei

et al. 2021

Applied Sciences

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The discrete element method (DEM) can be effectively used in investigations of the deformations and failures of jointed rock slopes. However, when to appropriately terminate the DEM iterative process is not clear. Recently, a displacement-based discrete element modeling method for jointed rock slopes was proposed to determine when the DEM iterative process is terminated, and it considers displacements that come from rock blocks located near the potential sliding surface that needs to be determined before the DEM modeling. In this paper, an energy-based discrete element modeling method combined with time-series analysis is proposed to investigate the deformations and failures of jointed rock slopes. The proposed method defines an energy-based criterion to determine when to terminate the DEM iterative process in analyzing the deformations and failures of jointed rock slopes. The novelty of the proposed energy-based method is that, it is more applicable than the displacement-based method because it does not need to determine the position of the potential sliding surface before DEM modeling. The proposed energy-based method is a generalized form of the displacement-based discrete element modeling method, and the proposed method considers not only the displacement of each block but also the weight of each block. Moreover, the computational cost of the proposed method is approximately the same as that of the displacement-based discrete element modeling method. To validate that the proposed energy-based method is effective, the proposed method is used to analyze a simple jointed rock slope; the result is compared to that achieved by using the displacement-based method, and the comparative results are basically consistent. The proposed energy-based method can be commonly used to analyze the deformations and failures of general rock slopes where it is difficult to determine the obvious potential sliding surface.

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“…e mechanical properties of the complete rock and joints were studied, and the joints were discussed. Salmi et al studied the effect of connectivity on the failure mode of slope [8]. Based on empirical method and numerical method, the stability of practical slope is evaluated and studied jointly; Tang et al [9] used 2D discrete element simulation to study the genetic mechanism of Caoling Landslide in 1941; Hu et al [10] based on the two-dimensional particle flow software (PFC2D) artificially synthesized rock mass technology and revealed the horizontal and intermittent joint thickness under different combinations of rock bridge length and joint spacing.…”

Section: Introductionmentioning

confidence: 99%

Failure Mechanism of Horizontal Layered Rock Slope under the Coupling of Earthquake and Weathering

Tian

Wang

Jin

et al. 2020

Advances in Civil Engineering

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In order to further reveal the dynamic failure process of horizontal complex layered rock slope in the coupling action of earthquake and weathering, based on the three-dimensional particle flow software PFC3D, the rock triaxial test was first carried out to obtain the macroscopic rock mechanics parameters. Secondly, PFC3D was used to establish a three-dimensional discrete element model of slope under 4 modes. Finally, the Wenchuan earthquake wave dynamic input is used to simulate the coupling effect of each model slope on earthquake-weathering. Under the progressive failure process, the results show that, during the triaxial test, the mudstone particles and sandstone particles exhibited shear failure and tensile failure, respectively. The seismic failure mode of the horizontal complex layered rock slope model is divided into tensile fracture-horizontal sliding failure (cavity depth 1.5 m and fissure depth 25%), tensile cracking-caving-dumping failure (cavity depth 3 m and fissure depth 37.5%), caving-dumping-rotation failure (cavity depth 4.5 m and fissure depth 50%), and caving-slip-rotation failure (cavity depth 6 m and fissure depth 62.5%), and the maximum vertical displacement of Model 2 can reach 6.2 m, and the maximum positive horizontal displacement is 7.8 m. With the deepening of the weathering degree, the coordination number of the rock block shows the attenuation advance effect and the elevation attenuation effect during the seismic period of 2–15 s. The total energy dissipation of the slope can be divided into two stages: fracture collision and overall collapse. The energy dissipation is more concentrated in the rock fracture collision stage, accounting for 89% to 95% of the total energy.

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Slope stability assessment using both empirical and numerical methods: a case study

Cited by 32 publications

References 27 publications

Earthquake Dynamic Failure Mechanism of Dangerous Rock Based on Dynamics and PFC3D

Earthquake Dynamic Failure Mechanism of Dangerous Rock Based on Dynamics and PFC3D

An Energy-Based Discrete Element Modeling Method Coupled with Time-Series Analysis for Investigating Deformations and Failures of Jointed Rock Slopes

Failure Mechanism of Horizontal Layered Rock Slope under the Coupling of Earthquake and Weathering

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