Sensitivity and Uncertainty Analyses of the Translational Slide at the Cidu Section, 3.1k of the Taiwan Formosan Freeway

Chen, Shong-Loong; Cheng, Chia-pang; Gui, Meen-Wah

doi:10.1061/9780784480045.011

Cited by 2 publications

(1 citation statement)

References 10 publications

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“…There were several days without rain fall before the landslide, but abundant water still could be found on the sliding surface, which implies that the underground water played an important role in this landslide. In this landslide, at least four people were killed, three cars were buried, and a bridge was destroyed [42,43]. The rocks in the area are sedimentary rocks, and come from a sandstone section (SS) located at the bottom of the Miocene Shihti Formation (St).…”

Section: Overview Of the Dip Slope Slides On National Freeway No 3 Imentioning

confidence: 99%

Influence of Failure Probability Due to Parameter and Anchor Variance of a Freeway Dip Slope Slide—A Case Study in Taiwan †

Chen

Cheng

2017

Entropy

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Abstract:The traditional slope stability analysis used the Factor of Safety (FS) from the Limit Equilibrium Theory as the determinant. If the FS was greater than 1, it was considered as "safe" and variables or parameters of uncertainty in the analysis model were not considered. The objective of research was to analyze the stability of natural slope, in consideration of characteristics of rock layers and the variability of pre-stressing force. By sensitivity and uncertainty analysis, the result showed the sensitivity for pre-stressing force of rock anchor was significantly smaller than the cohesive (c) of rock layer and the varying influence of the friction angle (φ) in rock layers. In addition, the immersion by water at the natural slope would weaken the rock layers, in which the cohesion c was reduced to 6 kPa and the friction angle φ was decreased below 14 • , and it started to show instability and failure in the balance as FS became smaller than 1. The failure rate to the slope could be as high as 50%. By stabilizing with a rock anchor, the failure rate could be reduced below 3%, greatly improving the stability and the reliability of the slope.

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Section: Overview Of the Dip Slope Slides On National Freeway No 3 Imentioning

confidence: 99%

Influence of Failure Probability Due to Parameter and Anchor Variance of a Freeway Dip Slope Slide—A Case Study in Taiwan †

Chen

Cheng

2017

Entropy

Self Cite

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Evaluation of the Material Point Method in Modeling the Post-failure and Run-Out of Translational Landslide: A Case Study in Taiwan

Yeh

Lai²,

et al. 2022

Journal of Testing and Evaluation

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The material point method (MPM) is an extended finite element method used to simulate large deformation scenarios. A massive translational landslide in Taiwan was adopted to validate the numerical technique for thorough investigations, including the digital terrain models (DTMs), laboratory experiments, and numerical analyses were available in a forensic report. The MPM code Anura3D was used to mimic the landslide’s kinematics, post-failure, and run-out process. An unstable sandstone/shale interlayer was found to lead to the slope sliding; therefore, the before-and-after DTMs from the report mentioned above were used to examine the run-out distance and deposition to determine the best fit for reduced material properties for this layer. The sliding paths, displacements, deviatoric strains, and the velocities of the sliding can be evaluated by dividing the material points into several groups to differentiate the kinematics among them. Meanwhile, the landslide duration and possible maximum safety distance were also assessed. This study has demonstrated that the MPM can analyze the large deformation, post-failure, and run-out distance of landslides. The critical timing of a slope failure is possible to be an essential index on national spatial planning for future disaster reduction.

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Sensitivity and Uncertainty Analyses of the Translational Slide at the Cidu Section, 3.1k of the Taiwan Formosan Freeway

Cited by 2 publications

References 10 publications

Influence of Failure Probability Due to Parameter and Anchor Variance of a Freeway Dip Slope Slide—A Case Study in Taiwan †

Influence of Failure Probability Due to Parameter and Anchor Variance of a Freeway Dip Slope Slide—A Case Study in Taiwan †

Evaluation of the Material Point Method in Modeling the Post-failure and Run-Out of Translational Landslide: A Case Study in Taiwan

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