Factors Affecting the Stability and Behavior of an MSE Wall: A Numerical Approach

Islam, Md. Azijul; Jeet, Abhijeet Acharjee; Gupta, Niloy; Gupta, Alinda; Islam, Tahsina

doi:10.1061/9780784484029.038

Cited by 2 publications

(2 citation statements)

References 13 publications

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“…are commonly being used for seepage analyses. Slope stability analyses can be executed using Limit Equilibrium (LE), FEM, and probabilistic method [10]. In recent years, the development of more advanced modules in GeoStudio that includes transient seepage and deformation analysis in which soil variables can be incorporated provides the option for rigorous analyses in rainfall-induced slope failure.…”

Section: Introductionmentioning

confidence: 99%

Numerical Evaluation of Slope Stability based on Temporal Variation of Hydraulic Conductivity

2023

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Slope failure is a common phenomenon all over the world on both man-made and natural slopes. Prolonged rainfall is one of the climatic factors which is largely responsible for slope failure. During heavy and prolonged rainfall, a part of the rainwater infiltrates through the soil and seeps into the slope. The infiltrated water lowers the matric suction and increases the porewater pressure. Eventually, the generated porewater pressure decreases the strength of the soil which results in slope failures. To evaluate the effect of rainwater seepage on slope stability, it is necessary to investigate the hydraulic conductivity of the slope soil. The objective of this study is to evaluate the effect of hydraulic conductivity on slope failure mechanisms. A finite element analysis of slope stability was conducted using Geo-Studio software. A numerical model was developed and calibrated with field monitoring data. The field monitoring data included the observation of hydraulic conductivity using a Guelph Permeameter. Afterward, the temporal variation of rainfall and hydraulic conductivity was incorporated into the SEEP/W program and the consequent changes in slope stability were evaluated in SLOPE/W. From the numerical analysis, with the identical strength parameters of the soil, different factors of safety were observed when the slope sections retain different hydraulic properties. Based on the numerical analysis, it was observed that hydraulic conductivity greater than 4×10-6 cm/s leads to slope failure. Periodic monitoring of hydraulic conductivity in the field may provide deep insight into rainfall-induced slope failures.

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Section: Introductionmentioning

confidence: 99%

Numerical Evaluation of Slope Stability based on Temporal Variation of Hydraulic Conductivity

2023

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“…Such limitations can be overcome using numerical methods such as finite element (FE) analysis, which can model the interaction between various elements and predict actual behavior accurately to serve as a design and analysis aid for nailing [2,15,16]. Numerical simulations using FE analysis can provide accurate results if the parameters representing soil characteristics are properly evaluated and interaction among different elements such as nails and soils are correctly considered [17,18]. Unterreiner et al [19], Babu et al [20], and Cheuk et al [21] applied 2D FE or finite difference methods for the analysis of nailed slopes, and many researchers have used this method for different applications, including the undrained capacity and stability of footing lying on layered slopes as well [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Parametric Assessment of Soil Nailing on the Stability of Slopes Using Numerical Approach

Elahi

Islam

2022

Geotechnics

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This study focuses on the stability analysis of slopes reinforced by soil nailing. The effects of slope geometry and nail parameters on slope stability are investigated using PLAXIS 2D. Four different slope angles and three different backslope angles are considered for assessing the effect of slope geometry on the stability of a nailed slope. The factor of safety (FS) was found to decrease with the increasing values of the slope angle as well as the backslope angle. The influence of different nail parameters (nail inclination, nail length, and nail spacing) was also investigated. With the increase in nail inclination, FS was found to increase initially and thereafter, reaching a peak value followed by a drop in FS. The optimum nail inclination was found between 0 and 25° at a horizontal angle, depending on the different slope geometries, which is evident from observation of the slip surface as well. With the increase of nail length, FS increases; however, the increase was small after L/H (length of nail/height of slope) reached a value of 0.9. Moreover, increasing the length of the nail was found to be effective in reducing the lateral movement of the slope. The maximum nail forces are observed in the bottom-most row of nails and increase with the depth. The inclusion of soil nailing with optimum nail parameters can increase FS by 29–75% depending on the slope geometry, signifying the effectiveness of nailing.

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Factors Affecting the Stability and Behavior of an MSE Wall: A Numerical Approach

Cited by 2 publications

References 13 publications

Numerical Evaluation of Slope Stability based on Temporal Variation of Hydraulic Conductivity

Numerical Evaluation of Slope Stability based on Temporal Variation of Hydraulic Conductivity

Parametric Assessment of Soil Nailing on the Stability of Slopes Using Numerical Approach

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