Case Study on Analyses of Slope Riverbank Failure

Taha, Nazaruddin Abdul; Shariff, Mohamad Shakri Mohmad; Ladin, Mohd Azizul

doi:10.1155/2022/1965224

Cited by 3 publications

(3 citation statements)

References 6 publications

(6 reference statements)

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“…In a study on a riverbank in Malaysia, GeoStudio was employed to model the riverbank based on borehole log reports and other data. The findings highlight that drawdown events significantly impact slope riverbank stability, as evidenced by the fluctuating Factor of Safety values during and after these events [28]. A new contact element model is introduced to simulate the contact friction state on the slide surface, which led to a more accurate analysis of slope stability [29].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Riverbank Slope Stability Considering Rainfall, Vegetation and Water Level Fluctuation

Ahsan,

Wang,

Sibgatullovich

et al. 2024

J. Engg. Res. & Sci.

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The occurrence of landslides and slope instability along riparian zones has been a recurrent phenomenon of substantial concern globally. This paper presents a comprehensive investigation of riverbank slope stability utilizing soils from the Yellow River in China, with a particular emphasis on the effects of water level fluctuations, precipitation, and vegetation. The research examines the interplay of multiple factors influencing slope stability by integrating empirical data from laboratory testing with numerical analysis using Plaxis3D. Salient findings indicate that vegetation significantly enhances riverbank slope stabilization, especially during precipitation events, and that water level fluctuations profoundly impact the mechanical behavior and integrity of riverbank slopes, particularly during rapid drawdown stages. The study underscores the significance of these aspects in riverbank protection and infrastructure development. Despite the rigorous methodology employed, the work acknowledges limitations in numerical modeling and laboratory test scale, highlighting the necessity for more advanced research in geotechnical engineering.

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Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Riverbank Slope Stability Considering Rainfall, Vegetation and Water Level Fluctuation

Ahsan,

Wang,

Sibgatullovich

et al. 2024

J. Engg. Res. & Sci.

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“…Slope failure is considered as one of the high-risk geo-environmental hazards since it has potential to be harmful, resulting in the loss of human life and damage of properties (Gallage et al, 2021;Xue et al, 2016). Generally, various factors contribute to slope instability such as heavy rainfall (Cho et al, 2021;Yang & Zhang, 2024), earthquake or shift of stress condition (Taha et al, 2022). As the results, slope reinforcement is essential in order to mitigate slope failure due to those factors.…”

Section: Introductionmentioning

confidence: 99%

Stability Assessment of Root-Reinforced Slopes Using Finite Element Limit Analysis

Hutama,

Farichah

2024

jpensil

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Slope instability poses serious threats to infrastructure and environmental sustainability. As a result, numerous reinforcement techniques have been used as disaster mitigation attempts to prevent slope failure. Among various traditional slope reinforcement methods, the use of vegetion root is more cost-effective and environmentally friendly. This paper presents stability assessment of root-reinforced slopes. Firstly, slope models were built for case of bare and root-reinforced slopes. The slope angles were varied in the range of 15º ~ 55 º. The root cohesion and depth of root zone were adjusted within the ranges of 0 ~ 20 kPa and 0 ~1.5 m, respectively. The strength reduction finite element limit analysis method was applied to evaluate the stability of the slopes in this study. The results indicate that factor of safety increases with the increasing of root cohesion and depth of root zone. The best factor of safety was obtained for the case with root cohesion and depth of root zone of 20 kPa and 1.5 m, respectively. Shear dissipation contours of the slope models also show that root reinforcement reduces shear dissipation energy along the failure surface, consequently lowering the possibility of slope failure.

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“…The result of slope stability analysis varies with different conditions. In most of the studies, slope stability analysis has been accomplished mainly in steady-state conditions without considering the effect of seasonal water level uctuation (Hossain et al 2011;Islam et al 2016;Saidi et al 2022;Taha et al 2022). The factor of safety (FS) for slope stability is changeable with changing hydrological conditions and rapid drawdown (Fatema and Ansary 2014).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Bank Erosion in the Ganges River, Bangladesh: An Integrated Geological, Geotechnical, and Hydrogeological Study

Preota,

Rahman,

Mia

et al. 2023

Preprint

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The purpose of the research was to integrateally characterize the erosional behavior of the Ganges riverbanks and understand the geological, geotechnical, and hydrological influence on bank erosion. The current study has used multi-temporal Landsat images spanning from 1973–2020 for planform analysis using Geographic Information System (GIS), geological fieldwork data, six standard penetration test (SPT) data, laboratory analysis, and slope stability model using SLIDE to understand geological-geotechnical factors and the influence of seasonal hydrological fluctuations on the bank erosion. GIS-based planform analysis identified the erosion-accretion rate and vulnerable areas for erosion. Results suggest that the intensity of bank erosion is higher at the outer meander bend, and the right bank is more erosion-prone than the left bank. Geological and geotechnical studies suggest that bank material types and their degree of cohesion control bank erosion. In the convex outer bend of the river, the helical flow erodes the non-cohesive sandy materials at the toe of the bank, hence, the upper clayey layer loses its strength and collapses, which is the main cause of the cantilever-type bank failure in this river. Results also suggest that the Factor of Safety (FS) is proportional to the difference between river water level (RWL) and groundwater level (GWL) in the uniformly graded high permeable soil. When the water level gradient shifts from GWL toward RWL, the FS of the bank slope decreases and collapses after reaching its critical point.

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Case Study on Analyses of Slope Riverbank Failure

Cited by 3 publications

References 6 publications

Numerical Analysis of Riverbank Slope Stability Considering Rainfall, Vegetation and Water Level Fluctuation

Numerical Analysis of Riverbank Slope Stability Considering Rainfall, Vegetation and Water Level Fluctuation

Stability Assessment of Root-Reinforced Slopes Using Finite Element Limit Analysis

Evaluation of Bank Erosion in the Ganges River, Bangladesh: An Integrated Geological, Geotechnical, and Hydrogeological Study

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