Discontinuous rock slope stability analysis by limit equilibrium approaches – a review

Azarafza, Mohammad; Akgün, Haluk; Ghazifard, Akbar; Asghari-Kaljahi, Ebrahim; Rahnamarad, Jafar; Derakhshani, Reza

doi:10.1080/17538947.2021.1988163

Cited by 73 publications

(35 citation statements)

References 100 publications

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“…This indicates that the slope had completely slid off and attained its final stable state. The entire sliding process is similar to composite failure mode [33]. Comparing Figures 9b and 13 indicates that the simulated final stage was considerably closer to conditions during the actual landslide.…”

Section: Comparison Of the Numerical Simulation Results With Actual Rock Slope Failuresmentioning

confidence: 66%

Investigations of a Weathered and Closely Jointed Rock Slope Failure Using Back Analyses

Shao

Chen

et al. 2021

Sustainability

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This study presents the case of a landslide triggered by a high groundwater level caused by several days of continuous rainfall in the northeastern region of Taiwan. The slope where this landslide occurred consists of closely jointed and weathered bedrock. By means of finite element limit analysis and the Hoek–Brown failure criterion, this study performed a slope failure simulation similar to the actual landslide and deduced the reasonable value range for the combination of key Hoek–Brown failure criterion parameters through back analyses. The results indicate that the key parameters affecting the bedrock’s slope stability were the geological strength index (GSI) and the disturbance factor (D), whereas the effects of the unconfined compressive strength (σci) were less significant. The results of the back analysis reveal that the suitable D-value range and GSI of closely jointed and weathered sandstone in the northeastern region of Taiwan are 0.8 to 0.9 and 20 to 30, respectively. These back-analyzed value ranges can serve as a reference for broader applications in the preliminary stability analysis of similar rock slopes where it is difficult to perform in situ investigation.

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Section: Comparison Of the Numerical Simulation Results With Actual Rock Slope Failuresmentioning

confidence: 66%

Investigations of a Weathered and Closely Jointed Rock Slope Failure Using Back Analyses

Shao

Chen

et al. 2021

Sustainability

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“…In some circumstances, the existence of an underground aquifer supplied by an upstream hydraulic recharge area may be a risk issue for such activity, as it is responsible for deep piezometric heads that can fluctuate seasonally [17]. Many researches have examined the mechanism of the influence of temperature and saturation on unsaturated clay slope stability in light of clay slope instability induced by ambient temperature and rainfall infiltration in summer and autumn [18,19]. The slope's factor of safety may be calculated by gradually diminishing the soil shear strength until the slope fails.…”

Section: Slope Stabilitymentioning

confidence: 99%

Slope Reinforcement Model Scale Test With X-Block

et al. 2022

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This study aims to determine the material composition and dimensions of X-block, develop a slope reinforcement model using X-block, evaluate the mechanical behavior of slopes that are reinforced with rock-bound by X-block, and analyze the performance of slope reinforcement using X-block. This research was conducted at Hasanuddin University's soil mechanics and civil engineering structure laboratory. The model scale test was employed in this study. The geometrical speciation of the test box is 150 cm in length, 60 cm in width, and 100 cm in height. The X-block model was produced using concrete with a FC of 25 MPa. The X-block was divided into two types: X-block type 1 and X-block type 2. Tensile strength testing is performed on the X-block. The slopes are made of clay soil and have a slope angle of 70 degrees. The loading test was conducted in three stages: without block, with X-block type 1, and with X-block type 2. The loading test uses a hydraulic pump equipped with a load cell and LVDT. The tensile strength of X-block type 1 is 2.56 MPa, whereas X-block type 2 has a tensile strength of 4.35 MPa. The development of the type X-block design, which is used as a retaining wall material, has shown that it can effectively withstand landslides on the slopes under consideration. The slope safety factor rose dramatically after being reinforced with type X-blocks, reaching 2.73 for both X-block type 1 and X-block type 2. Doi: 10.28991/CEJ-2022-08-03-014 Full Text: PDF

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“…According to the effectiveness of the metaheuristics and their modified versions, these methods have been widely used to solve several geotechnical engineering problems, as presented in Table 1. In addition, a comprehensive review of slope stability analysis methods can be found in References [24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Minimum Safety Factor Evaluation of Slopes Using Hybrid Chaotic Sand Cat and Pattern Search Approach

et al. 2022

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This study developed an efficient evolutionary hybrid optimization technique based on chaotic sand cat optimization (CSCO) and pattern search (PS) for the evaluation of the minimum safety factor of earth slopes under static and earthquake loading conditions. To improve the sand cat optimization approach’s exploration ability, while also avoiding premature convergence, the chaotic sequence was implemented. The proposed hybrid algorithm (CSCPS) benefits from the effective global search ability of the chaotic sand cat optimization, as well as the powerful local search capability of the pattern search method. The suggested CSCPS algorithm’s efficiency was confirmed by using mathematical test functions, and its findings were compared with standard SCO, as well as some efficient optimization techniques. Then the CSCPS was applied for the calculation of the minimum safety factors of the earth slope exposed to both static and seismic loads, and the objective function was modeled based on the Morgenstern–Price limit equilibrium method, along with the pseudo-static approach. The CSCPS’s efficacy for the evaluation of the minimum safety factor of slopes was investigated by considering two case studies from the literature. The numerical experiments demonstrate that the new algorithm could generate better optimal solutions via calculating lower values of safety factors by up to 10% compared with some other methods in the literature. Furthermore, the results show that, through an increase in the acceleration coefficient to 0.1 and 0.2, the factor of safety decreased by 19% and 32%, respectively.

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Discontinuous rock slope stability analysis by limit equilibrium approaches – a review

Cited by 73 publications

References 100 publications

Investigations of a Weathered and Closely Jointed Rock Slope Failure Using Back Analyses

Investigations of a Weathered and Closely Jointed Rock Slope Failure Using Back Analyses

Slope Reinforcement Model Scale Test With X-Block

Minimum Safety Factor Evaluation of Slopes Using Hybrid Chaotic Sand Cat and Pattern Search Approach

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