Slope stability analysis at highway BR-153 using numerical models

Rubio, Ricardo Hundelshaussen; Florez, Jorge Hernan; Zingano, André Cezar

doi:10.1590/0370-44672015690040

Cited by 2 publications

(1 citation statement)

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“…Rockfalls are the most common type of slope movement that makes rock cuts along transportation corridors in hazardous mountainous regions [1]. e analysis of the stability of rock slopes was therefore performed primarily to assess their safety [2][3][4][5]. However, the selection of the analysis tool depended on the conditions of the site and its expected mode of failure [6,7].…”

Section: Introductionmentioning

confidence: 99%

Establishing Reliable Slope Stability Hazard Map Based on GIS-Based Tool in Conjunction with Finite Element Methods

Sengani

Muavhi

Mulenga

2022

Advances in Civil Engineering

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This paper describes the establishment of a slope stability hazard map based on a GIS-based tool in conjunction with the finite element method (FEM). In this regard, Advanced Space-borne Thermal Emission and Reflection Radiometer (ASTER) images were modeled using the Weight of Evidence (WOE) technique. The previous simulation was therefore validated using visual observations and FEM (Phase 2D and SLIDE). The above techniques made it possible to develop and validate the reliable slope stability hazard map with the use of a case study. The results show that the established hazard map correlates very well with visual observation and stability assessment performed using FEM models. The map categorises slopes based on their susceptibility to failure; however, it has been discovered that most of the slopes that rated highly susceptible were located along or closer to geological features (faults) or streams and were at high elevations. Similarly, the SLIDE model has been utilised to perform the safety factor of the identified slope and the model has shown that those slopes were not stable. Furthermore, the influence of geological features was further studied using the Phase 2D model and it was discovered that the features contributed largely to the displacement of the rock mass with time, and as a result, instability was expected. The overall conclusion of the study is that the combination of geotechnical and GIS-based tools appeared to provide an insight in categorising the hazard of slopes located within mountainous terrain.

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Section: Introductionmentioning

confidence: 99%

Establishing Reliable Slope Stability Hazard Map Based on GIS-Based Tool in Conjunction with Finite Element Methods

Sengani

Muavhi

Mulenga

2022

Advances in Civil Engineering

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Numerical study on the evolution process of slope failure triggered by extreme rainfall along a road-cut in mountainous terrain

Sengani

Allopi

2022

Sci Rep

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Modeling the flow evolution of a slope governed by solid mass has been recognized as a challenge, yet most stability analyses are only based on stability number or Safety Factor (FOS). The stability number in most cases does not incorporate the deformation characteristics of the material and the change in solid mass phases such as from solid-like to fluid-like phase. Therefore, the purpose of this study is to present a numerical simulation that describes the failure evolution of a slope with a fault along with a road cut. A finite element method associated with an elastoplastic model with strain softening is adopted to provide a failure evolution of R71 road cut slope instabilities. The results of the study have demonstrated that the present computational framework is capable of quantitatively reproducing the failure evolution process, the final run-out distance of the slope material. The simulation has evidenced that the flow evolution of material during extreme rainfall is expected to extend to the final deposit of 4.5 m, indeed, the field measurements and observations also confirm. Furthermore, the simulations also demonstrated that the distance in which material can reach is largely controlled by the composition and phases of the material undergone during flow evolution. Owing to that, the resistance of material has a major role in the run-out of the material; this resistance of the material is also controlled by shearing and absorbed kinetic energy during the process. The overall conclusion is that, for material to flow for a longer distance, high kinetic energy and more shearing of material are expected to take place during this process. It is recommended that other sophisticated methods could be utilized to further the results.

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Slope stability analysis at highway BR-153 using numerical models

Cited by 2 publications

References 1 publication

Establishing Reliable Slope Stability Hazard Map Based on GIS-Based Tool in Conjunction with Finite Element Methods

Establishing Reliable Slope Stability Hazard Map Based on GIS-Based Tool in Conjunction with Finite Element Methods

Numerical study on the evolution process of slope failure triggered by extreme rainfall along a road-cut in mountainous terrain

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