Numerical Modeling of Soil-Nailed Slope Using Drucker–Prager Model

Jaiswal, Sagar; Srivastava, Ananya; Chauhan, Vinay Bhushan

doi:10.1007/978-981-16-1993-9_11

Cited by 8 publications

(5 citation statements)

References 8 publications

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“…Rotte et al [7] reported FS almost similar to the current study since the soil used in their study is similar to the one used for the present study. Although the patterns of the results obtained in the current FE analysis are similar to Fan and Luo [1] and Rotte et al [3], the differences in values may be due to the different soil types and nail parameters used and the different types of software and their features. The results obtained in the study are also compared with the available existing literature.…”

Section: Model Comparison and Verificationsupporting

confidence: 68%

“…Soil nailing is widely used as a form of reinforcement to improve the stability of steep slopes and vertical cuts [1][2][3][4][5][6]. The stability of nailed slopes depends on the mechanism of transferring resisting tensile forces generated in the nails into the ground through friction or adhesion mobilized at the interfaces.…”

Section: Introductionmentioning

confidence: 99%

“…The traditional design method of the nailed slope was based on the slope angle, uniform nail length, equal nail spacings, and nail inclination between 10 • and 20 • [31]. Jaiswal et al [3], based on their study, stated that the length and inclination of the soil nail are the major controlling parameters for stabilizing the slope. However, the stability of a soil-nailed slope is closely related to other parameters such as the back slope inclination (α), cohesion, and friction angle of the soil [1,32].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Model Comparison and Verificationsupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Elahi

Islam

2022

Geotechnics

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“…Thus, the bearing capacity of the foundation adjacent to the undrained slope will have a great effect on the stability of the engineering [1]. The numerical simulation of the stability analysis includes the finite element method [2,3], the discrete element model [4], and the fast Langrangian analysis of continua (FLAC) [5]. Compared with vertical loads, inclined loads should take into account the effect of the inclination angle [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

New Failure Mechanism for Evaluating the Inclined Failure Load Adjacent to Undrained Soil Slope

Fang

2023

Sustainability

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The failure mechanism is the key problem for calculating the inclined failure loads adjacent to the undrained soil slope. Based on the undrained slip line field and boundary value problems, a new failure mechanism is proposed to evaluate the inclined failure loads adjacent the undrained slope. The rationality of the proposed method is proved by the definition of the ultimate load and the finite element upper bound analysis (FE-UB). It is not reasonable to assume the failure models since the failure models vary with the inclination load and angle. The proposed method gives a new evaluating indicator, which first calculates the inclined failure load and then determines the failure models.

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“…Rows of piles and steel nails applied for the modelled cut-slope have indicated the improvement in the factor of safety significantly. Nowadays, soil nailing is widely used as a reinforcement technique to improve the stability of steep slopes and vertical cuts (Fan and Luo, 2008;Jaiswal et al, 2022;Lin et al, 2013;Pandey et al, 2021;Zhang et al, 2014). The increase of L/H (ratio of soil nail to height of the slope) from 0.5-0.9 increases the factor of safety by 16.2-33.8% for slopes varying within 45°-90°, whereas the increase of L/H from 0.9-1.2 increases the factor of safety by only 1.7-4.3% (Elahi et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of cut-slope stability in the Lesser Himalayan terrain of west-central Nepal

Shrestha,

Paudyal,

Thapa

2023

Journal of Nepal Geological Society

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Area development without due consideration of geological factors has led to recurrent slope failures within the Lesser Himalayan Zone thereby rendering socio-economic impacts. This issue is well exemplified by cut-slopes in major highways of Nepal traversing through a diverse range of rocks and soils. The study has focused on addressing the stability challenges posed by highly vulnerable excavated cut-slopes with particular attention given to a debris cut-slope considered as a model for this study is located in the Lesser Himalayan terrain of west-central Nepal. The cut-slope model is analyzed by numerical modellings through both the limit equilibrium method (LEM) and finite element method (FEM). The study further evaluated the underlying causes of these failures to recommend the options for remedial measures. Data acquired from two-dimensional electrical resistivity tomography (2D-ERT), multi-channel analysis of surface waves (MASW), and laboratory testing were integrated into numerical modelling and simulation. The results showed that the lower slope below the natural benching is stable whereas the upper failed slope is unstable due to reduced gravitational loading. In LEM, factors of safety (FoS) range from 0.77 to 0.89 for cut-slope angles of 70° and 60° whereas the FoS in modified slopes (50° and 40°) were slightly greater than 1 which ranged from 1.01 to 1.18 and indicated marginal stability. Application of 25 mm diameter soil nails, each measuring 6 m in length and spaced at 2 m intervals with tensile and plate capacity of 125.6 kN, bond strength of 75.4 kN/m, and 80% of nail length have produced FoS of 1.30 or greater in LEM and FEM which is acceptable values specified by EM 1110-2-1902 and IS 456 2000 for end-of-construction and multistage loadings.

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Numerical Modeling of Soil-Nailed Slope Using Drucker–Prager Model

Cited by 8 publications

References 8 publications

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

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

New Failure Mechanism for Evaluating the Inclined Failure Load Adjacent to Undrained Soil Slope

Numerical modelling of cut-slope stability in the Lesser Himalayan terrain of west-central Nepal

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