Probabilistic slope stability analysis as a tool to optimise a geotechnical site investigation program

Zoorabadi, Mahdi; Canbulat, Ismet; Ruest, Marc

doi:10.36487/acg_rep/1604_31_zoorabadi

Cited by 2 publications

(3 citation statements)

References 7 publications

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“…It was generally observed that the highest embankment produced the lowest SF for both the LEM and FEM. Moreover, a close range was discovered between the patterns in all variations presented inFigures 16,17,18,and 22 while the others indicate a more significant difference.Figures 16,17…”

mentioning

confidence: 62%

“…It is possible to introduce some minor errors in the typical shear strength parameters due to the use of this approach, thereby, leading to uncertainty. Therefore, deterministic and probabilistic studies were used to evaluate the slopes' stability with due consideration for several data and uncertainties [15]- [17]. The slope reinforcement was also successfully simulated by this method in order to increase the SF values on numerous slopes [18]- [22].…”

Section: Limit Equilibrium Methods (Lem)mentioning

confidence: 99%

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Safety Factors Investigation Based on FEM and LEM Approach in Toll Road Embankment Slope

Fitri¹,

Fitria²

2022

cea

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The Pejagan-Pemalang toll road which is a Section II project was designed at different embankment heights on soft soil subgrade. The process involved investigating the slope stability of these embankments through the determination of the safety factor. This can be achieved using different methods such as the limit equilibrium method (LEM) and the finite element method (FEM) which are considered the standard approaches. However, the presentation of different numerous results for the safety factors (SF) in landslide calculations usually makes it difficult for the engineer to understand some uncertain conditions. Therefore, this study aims to determine the safety factors using LEM and FEM approaches at different conditions. The soil subgrade used was in SPT and three models of the properties were obtained. Moreover, a Geo-Studio program with Slope-W analysis was applied using the Morgenstern-Price for the LEM and PLAXIS for the FEM. The height was varied at 2 to 8m with the slope H: V at 1:1, 1:1.5, and 1:2. The simulation was conducted at three different levels of groundwater. The results showed that the height, embankment geometry, and groundwater levels were affected in the SF analysis using the two methods. It was also discovered in all categories that higher embankments had smaller SF while the higher angle of slope produced a higher SF. Furthermore, the properties of the soft soil were observed to have influenced the SF result as indicated by the narrow difference in the correlation between the embankment height and SF. The results of the LEM and FEM were also compared and the observations were explained. The findings of this study are expected to serve as a guide for engineers, especially those in road toll projects, to determine the optimum model needed to predict slope failure in embankments for toll roads.

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confidence: 62%

Section: Limit Equilibrium Methods (Lem)mentioning

confidence: 99%

Safety Factors Investigation Based on FEM and LEM Approach in Toll Road Embankment Slope

Fitri¹,

Fitria²

2022

cea

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“…This is because the value factor of safety cannot capture the uncertainty resulting from the calculation. These aspects of reality will affect the results of the analysis (Zoorabadi, Canbulat and Ruest, 2016). Another alternative to the FS approach to reduce this uncertainty is to use a probabilistic method to calculate the probability of the failure (Azizi, Marwanza, and Ghifari, 2019).…”

Section: Introductionmentioning

confidence: 99%

The application of failure method probability for analyzing in pit dump stability at West Block ‘X’ pit PT Berau Coal - East Kalimantan

Adriansyah,

Saprana,

Sophian

et al. 2021

IMJ

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West Block 'X' pit is one of the coal mining locations operated by the Lati Mine Operation – PT Berau Coal. Administratively, the Lati Mine is located as part of Berau Regency – East Kalimantan. The study area is located at the north side of the concession, in a syncline fold structure zone. The disposal design in this area needs to special attention from slope stability aspect due it is located on the wing of a mega syncline with a certain slope and constituent of unconsolidated materials. The pit design needs to be stable. The purpose of this study is to determine the level of stability of the in-pit dump by analyzing the current in-pit dump stability based on the value of the safety factor (FS) and the probability of failure (PoF). The method used in this study is a probabilistic analysis of slope stability based on the Morgenstern-Price method to obtain the value of the safety factor and the probability of failure. The study results show that the slope is in the safe category (stable slope) in the range of PoF values 0 – 1%, marginal slope 1 – 12%, and unstable slope above 12%. Based on such as results, it is necessary to modify the slope geometry categorized as unstable to carry out mine operation safely underneath the toe of slope.

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Probabilistic slope stability analysis as a tool to optimise a geotechnical site investigation program

Cited by 2 publications

References 7 publications

Safety Factors Investigation Based on FEM and LEM Approach in Toll Road Embankment Slope

Safety Factors Investigation Based on FEM and LEM Approach in Toll Road Embankment Slope

The application of failure method probability for analyzing in pit dump stability at West Block ‘X’ pit PT Berau Coal - East Kalimantan

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