Using Finite Element Strength Reduction Method for Stability Analysis of Geocell-Reinforced Slopes

Arvin, Mohammad Reza; Zakeri, Amir; Shoorijeh, Mostafa Bahmani

doi:10.1007/s10706-018-0699-0

Cited by 35 publications

(14 citation statements)

References 45 publications

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“…All slope stability analyses are performed using FALC 3D and its built-in safety factor calculation method, that is, the strength reduction method. [31][32][33][34][35][36] All the computations are executed by a computer with an Intel i7 7700HQ processor. Table 1 shows the soil properties adopted in this study.…”

Section: Slope Model and Refined Safety Factor 21 Slope Modelmentioning

confidence: 99%

Precise evaluation method for the stability analysis of multi-scale slopes

et al. 2020

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Slope stability analysis is a multi-scale problem. Typically, owing to the distinctions of slope scales (e.g., slope height or slope angle) in practical engineering, the stability calculation results of slopes with various scales from numerical methods inevitably exhibit different computational precision levels in the case of identical computational grids, and therefore the stability results of different slopes cannot be compared. To achieve equal accuracy stability analysis for multi-scale slopes, this study establishes numerical models of slopes with various scales as well as different grid shapes and sizes to conduct stability analysis. The results show the following: (a) a positive correlation relationship exists between the safety factor of the slope and the scaling factor, which is defined as the ratio of the grid size to the slope height; (b) the definition of the refined safety factor is given, representing the safety factor that corresponds to the infinitesimal grid size and eliminating the computational error of slope stability analysis caused by grid size or shape; (c) on this basis, embarking on the composite influence of multiple scales of slope on stability analysis, the study proposes a simplified treatment method suitable for evaluating the refined safety factor of the multi-scale slopes, which is verified as valid and feasible by some examples.

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Section: Slope Model and Refined Safety Factor 21 Slope Modelmentioning

confidence: 99%

Precise evaluation method for the stability analysis of multi-scale slopes

et al. 2020

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“…Asadollahi and Tonon [7] showed that the increase in normal stress on joint increases displacement of the joint reaching the peak shear strength, as shown in Figure 3. Slope stability analysis methods, such as the common limit equilibrium and strength reduction, are based on limit state under the assumption that sliding zoom is at critical state [49][50][51][52]. In practice, the state may be observed before or after the peak state, resulting in failure to satisfy this assumption.…”

Section: Optimization Of Reinforcement Positionmentioning

confidence: 99%

Shear Resistance of Rock Joint under Nonuniform Normal Stress

Lin

Chen

et al. 2020

Advances in Materials Science and Engineering

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Many factors influence the shear resistance of rock joints. Among them, the above overburden load is the most important factor. The uneven thickness of the overburden causes the joints to be subjected to the nonuniform distribution load. While the peak shear strength shows nonlinear relationship with normal stress, linear superposition cannot be used to calculate the overall shear resistance of joint under nonuniform normal stress distribution. In this paper, the nonlinear shear strength model, JRC-JCS model, is applied to study the overall shear resistance of the joint under four nonuniform distribution patterns of normal stress. The results show that when the normal stress is distributed in a nonuniform way, the shear resistance provided by rock joint as a whole decreases with the increase of the normal stress distribution interval. Given the nonuniform distribution of normal stress along the joint, the shear resistance obtained by the Mohr-Coulomb linear model is overestimated. In order to give full play to the overall shear performance of the joint, the shear strength at different positions on the joint should be as close as possible. Then, the shear strength of joint parts can enter peak state condition simultaneously, at which time the shear strength is fully exerted.

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“…The first phase of the procedure is based on a FEM-based stability analyses, performed through the shear strength reduction technique [23][24][25][26]. It provides the safety margin (also known as factor of safety or FS) of the studied slope as the number by which the original shear strength parameters must be divided in order to bring the slope to failure.…”

Section: Introductionmentioning

confidence: 99%

Post-Collapse Evolution of a Rapid Landslide from Sequential Analysis with FE and SPH-Based Models

et al. 2021

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Propagation models can study the runout and deposit of potential flow-like landslides only if a reliable estimate of the shape and size of the volumes involved in the phenomenon is available. This aspect becomes critical when a collapse has not yet occurred and the estimation of the unstable volume is not uniquely predictable. This work proposes a strategy to overcome this problem, using two established analysis methods in sequence; first, a Strength Reduction Method (SRM)-based 3D FEM allows the estimate of the instable volume; then, this data becomes an input for a Smoothed Particle Hydrodynamics (SPH)-based model. This strategy is applied to predict the possible evolution of Sant’Andrea landslide (North-Eastern Italian Alps). Such a complex landslide, which affects anhydrite–gypsum rocks and is strongly subject to rainfall triggering, can be considered as a prototype for the use of this procedure. In this case, the FEM–SRM model is adopted, which calibrates using mapping, monitoring, geophysical and geotechnical data to estimate the volume involved in the potential detachment. This volume is subsequently used as the input of the SPH model. In this second phase, a sensitivity analysis is also performed to complete the evaluation of the most reliable final soil deposits. The performed analyses allow a satisfactory prediction of the post-collapse landslide evolution, delivering a reliable estimate of the volumes involved in the collapse and a reliable forecast of the landslide runout.

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Using Finite Element Strength Reduction Method for Stability Analysis of Geocell-Reinforced Slopes

Cited by 35 publications

References 45 publications

Precise evaluation method for the stability analysis of multi-scale slopes

Precise evaluation method for the stability analysis of multi-scale slopes

Shear Resistance of Rock Joint under Nonuniform Normal Stress

Post-Collapse Evolution of a Rapid Landslide from Sequential Analysis with FE and SPH-Based Models

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