Sensitivity Analysis of Factors Affecting Time-Dependent Slope Stability under Freeze-Thaw Cycles

Chang, Zhiguo; Cai, Qingxiang; Ma, Li; Liu, Ran

doi:10.1155/2018/7431465

Cited by 12 publications

(3 citation statements)

References 15 publications

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“…There are many methods of conducting a sensitivity analysis, and Huang [49] and Qiu et al [50] summarized the sensitivity analysis methods of influencing factors of slope stability. The sensitivity of strata factors on the seismic stability of a loess-mudstone slope based on the orthogonal test was studied in this paper.…”

Section: Discussionmentioning

confidence: 99%

Influence of Loess–Mudstone Strata Structure on Slope Seismic Stability of Loess Plateau in China

Zhang,

Qi,

Zhao

et al. 2023

Applied Sciences

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The widely distributed loess–mudstone strata structure in the Loess Plateau of China is one of the fundamental reasons for the susceptibility and group occurrence of seismic landslides in the area. This study took the loess landslides induced by the Haiyuan earthquake as a case study. Through extensive field investigations, the loess cover thickness, mudstone dip angle, slope height, and slope angle were chosen as the influencing factors. Together with mathematical statistics and geotechnical tests, two models, one of a loess–mudstone slope and the other of a pure loess slope, were constructed. Their seismic stabilities under different slope angles and slope heights were compared to analyze the influence of the underlying mudstone strata on the loess slope seismic stability. Meanwhile, a sensitivity analysis of these strata factors affecting the seismic stability of the loess–mudstone slope was carried out based on the orthogonal test. The results showed that ignoring the underlying mudstone strata would lead to smaller calculation results than the actual situation. The sensitivity influence of the factors on the loess–mudstone slope seismic stability comprised the slope angle, loess cover thickness, slope height, and mudstone dip angle from high to low.

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Section: Discussionmentioning

confidence: 99%

Influence of Loess–Mudstone Strata Structure on Slope Seismic Stability of Loess Plateau in China

Zhang,

Qi,

Zhao

et al. 2023

Applied Sciences

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“…In recent years, with the development in the mining of mineral resources and the construction of infrastructure, such as open-pit mining, tunnel excavation, and highway and railway construction, have gradually extended to high-cold and high-altitude regions (Chang et al, 2018;Shen et al, 2018;Fan et al, 2020). The rock slopes of open-pit mining are severely affected by cyclic freeze-thaw (F-T) actions (the alternating freezing and thawing of water in rocks) in cold regions (Jamshidi et al, 2013;Huang et al, 2019Huang et al, , 2022.…”

Section: Introductionmentioning

confidence: 99%

Mechanical characteristics and damage evolution of granite under freeze–thaw cycles

Li¹,

Li²,

Du³

et al. 2023

Front. Energy Res.

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Rocks in cold regions experience freeze–thaw (F–T) cycles, which have a significant impact on their mechanical properties, causing a series of engineering challenges that threaten engineering stability. To investigate the mechanical characteristics and damage evolution of granite under the influence of F–T cycles, the microstructural evolution and macroscopic mechanical properties of granite were analyzed by conducting P-wave velocity tests, computed tomography scanning, and uniaxial compression tests subjected to different F–T cycles. The results revealed the following: 1) the number of F–T cycles and saturated water content significantly impact on the mechanical properties of granite; 2) as the number of F–T cycles increases, the P-wave velocity, peak strength, elastic modulus, and coefficient of frost resistivity of granite gradually decrease, but the F–T damage values increase; 3) when the number of F–T cycles is less than 40 but within a certain range (0–100), the damage variable of granite increases rapidly, but then gradually tends to stabilize; 4) the damage gradually steadily spreads to the central region of the granite sample as the number of F–T cycles increases, and the ends and marginal regions of the granite samples are more susceptible to damage, and 5) three damage variables with different definitions (elastic modulus, density, and porosity) can be used to predict the degree of damage of granite under F–T cycles.

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“…e sensitivity analysis of slope is helpful to study the main factors causing the deterioration of slope stability [29][30][31][32]. FLAC3D is used to establish the slope model, and it is found that the freeze-thaw cycle is the sensitive factor of slope stability in the plateau area [33]. Controlling the freeze-thaw cycle is beneficial to the stability of the slope in the plateau area.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of Multistage Fill Slope Based on Finite Element Model

Yuan

et al. 2021

Advances in Civil Engineering

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Based on the strength reduction method, the laws of slope displacement and the changing positions of the sliding surface during the filling process are studied. The model of multistage fill slope is established by the finite element software PLAXIS. The difference is compared between the slope with no reinforcement and with reinforcement under the same working condition. Sensitivity analysis is carried out from two aspects which are internal factors and external factors. The finite element analysis shows that the settlement of the multistage fill slope with no reinforcement is mainly concentrated on the right side of the slope and gradually decreases with the increase of the filling height. The position of the sliding outlet is located at the joint of the first and the second grade of the slope. The effect of the reinforcement on the sliding surface is ideal. It is obvious that the reinforcement can supply the slope with a better position of the sliding surface, which is beneficial to the stability of the slope. The sensitivity analysis shows that unit weight, ratio of slope, and height of each grade are negatively correlated with the safety factor. At the same time, the platform width, cohesion, and internal friction angle are positively correlated with the safety factor. The internal friction angle has the greatest influence on the stability of the slope. Besides, the platform width and the height of each grade should be controlled at about 4 m. The sensitivity analysis provides a reference for the design of the multistage filling slope.

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Sensitivity Analysis of Factors Affecting Time-Dependent Slope Stability under Freeze-Thaw Cycles

Cited by 12 publications

References 15 publications

Influence of Loess–Mudstone Strata Structure on Slope Seismic Stability of Loess Plateau in China

Influence of Loess–Mudstone Strata Structure on Slope Seismic Stability of Loess Plateau in China

Mechanical characteristics and damage evolution of granite under freeze–thaw cycles

Sensitivity of Multistage Fill Slope Based on Finite Element Model

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