Effect of Vertical Seismic Coefficient in Slope Stability Analysis

Das, Sukanta; Maheshwari, B. K.

doi:10.1007/978-981-16-6456-4_30

Lecture Notes in Civil Engineering

2022

DOI: 10.1007/978-981-16-6456-4_30

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Effect of Vertical Seismic Coefficient in Slope Stability Analysis

Sukanta Das

B. K. Maheshwari

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2024

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“…constant equivalent-static acceleration 1,15,16 . Existing literature predominantly focuses on the influence of horizontal seismic acceleration on slope stability with limited attention given to the effects of vertical acceleration on slope failures [15][16][17][18][19][20][21] . In the study conducted by Zhang et al, the impact of vertical acceleration on the stability of three-dimensional homogeneous slopes was explored 22 .…”

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Analysing Slope Stability in Response to Blast-Induced Dynamic Loading by Pseudo-Static Approach

Ramana,

Thote,

Singh

2024

jmmf

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Regular blasting in opencast coal mines generates significant ground vibrations, impacting mine slope stability and posing risks to life and property. This study focuses on monitoring ground vibrations in an opencast coal mine through near-field monitoring and investigating the impact of blast-induced seismic loading on slope stability. The approach involves a pseudostatic method utilising Strength Reduction Factor (SRF), based on Finite Element (FE) numerical modelling software. The study examines a pit slope with a tension crack under seismic loading, varying the intensity of seismic coefficients (Ks) from 0 to 0.5. These coefficients are determined through field vibration monitoring during production blasts. In numerical modelling, seismic loading is considered in both horizontal (outward of slope face) and vertically downward (in-line with gravity). Numerical modelling incorporates dimensionless horizontal seismic coefficient (Kh) and vertical seismic coefficient (Kv), and both directions which is expressed as Seismic Coefficient Ratio (SCR) which is the ratio of Kv and Kh for interpretation of results. Although SCR induces changes in the Factor of Safety (FoS), its impact is minimal compared to seismic loading solely in the horizontal direction. Consequently, increasing SCR leads to a decrease in FoS. The study observes that Peak Ground acceleration (PGA) in the longitudinal direction has greater dominance than in the transverse direction. Additionally, the seismic wave in the horizontal direction destabilises the slope more than the corresponding vertical seismic wave. These findings are elucidated in the context of the Critical Slip Surface (CSS).

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confidence: 99%

Analysing Slope Stability in Response to Blast-Induced Dynamic Loading by Pseudo-Static Approach

Ramana,

Thote,

Singh

2024

jmmf

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Effect of Vertical Seismic Coefficient in Slope Stability Analysis

Cited by 1 publication

References 5 publications

Analysing Slope Stability in Response to Blast-Induced Dynamic Loading by Pseudo-Static Approach

Analysing Slope Stability in Response to Blast-Induced Dynamic Loading by Pseudo-Static Approach

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