Analytical Method for Predicting the Mobility of Slow-Moving Landslides owing to Groundwater Fluctuations

Conte, Enrico; Troncone, Antonello

doi:10.1061/(asce)gt.1943-5606.0000486

Cited by 33 publications

(9 citation statements)

References 14 publications

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“…Numerous studies have focused on the mechanism of rainfall-triggered landslides [21][22][23][24][25][26][27][28][29][30]. Results show that when rainfall occurs on slopes, the hydraulic properties of soil and rainfall patterns control the seepage behavior.…”

Section: Introductionmentioning

confidence: 99%

Analyzing the Effect of Soil Hydraulic Conductivity Anisotropy on Slope Stability Using a Coupled Hydromechanical Framework

Yeh

Tsai

2018

Water

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In studies on the effect of rainfall on slope stability, soil hydraulic conductivity is usually assumed to be isotropic to simplify the analysis. In the present study, a coupled hydromechanical framework based on transient seepage analysis and slope stability analysis is used to investigate the effects of hydraulic conductivity anisotropy on rainfall infiltration and slope safety at various slope locations (the top of the slope, the slope itself and the toe of the slope). The results show that when the vertical hydraulic conductivity (K y) is constant, the horizontal hydraulic conductivity (K x) increases (i.e., anisotropy increases). This occurs because rainfall tends to infiltrate into the interior of the slope, resulting in the soil on top of the slope and on the slope itself being easily influenced by rainfall, leading to soil instability. The change of rainfall infiltration at the slope itself is the most significant. When the anisotropic ratio K r (=K x /K y) increased from 1 to 100, the depth of the wetting zones for loam, silt and clay slopes increased by 23.3%, 33.3% and 50%, respectively. However, increased K r led to a slower infiltration rate in the vertical direction at the toe of the slope. Compared to the results for K r = 1 and for K r = 100, the thickness of the wetting zones at the toe of loam and silt slopes decreased by 23.3% and 30.0%, respectively. For the clay slope, K r changes did not significantly affect the wetting zones because of poor permeability. The results of this study suggest that the effect of soil hydraulic conductivity anisotropy should be considered when estimating slope stability to better understand the effect of rainfall on slopes.

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Section: Introductionmentioning

confidence: 99%

Analyzing the Effect of Soil Hydraulic Conductivity Anisotropy on Slope Stability Using a Coupled Hydromechanical Framework

Yeh

Tsai

2018

Water

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“…e application of Mohr-Coulomb model in soil mechanics can give a more reasonable solution, and the infinite slope model is used to assess the occurrence of landslide due to a prescribed rainfall [35,36]. It is a commonly used method to study geological engineering related issues.…”

Section: Computing Modelmentioning

confidence: 99%

Study on the Stability of the Geogrids-Reinforced Earth Slope under the Coupling Effect of Rainfall and Earthquake

Zhang

Huang

Hou

et al. 2020

Mathematical Problems in Engineering

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This paper focuses on understanding the dynamic response problem of flexible wrapped reinforced Earth slope under the coupling effect of earthquake and rainfall; a numerical calculation model of reinforced Earth slope considering the coupling effect of earthquake and rainfall was established. The dynamic response, pore pressure, and tensile stress distribution of the reinforcement under the rainfall before earthquake, the rainfall after the earthquake, and earthquake-rainfall are studied. The results show that the coupling effect of earthquake and rainfall is an influential factor in the dynamic analysis of reinforced Earth slopes, the analysis of which should be paid attention to and researched in the future. The combination of geogrid and soil effectively improves the deformation of the slope and the overall stability, reduces the secondary disaster of the slope, and provides a reference for the seismic construction design of the reinforced Earth slope.

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“…In the context of natural slopes, where landslide forecasting is the main goal, these methods target both spatial and temporal forecasting. They range from data-driven approaches such as statistics-based methods which are typically used for regional to global slope stability analysis [6,7], to simplified physics-based methods often used on a local scale (e.g., infinite slope analysis [8][9][10]) and advanced numerical analysis methods such as the finite element method (FEM) at the site-specific scale [11].…”

Section: Introductionmentioning

confidence: 99%

A Data-Driven Surrogate Approach for the Temporal Stability Forecasting of Vegetation Covered Dikes

Jamalinia

Tehrani

Steele‐Dunne

2021

Water

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Climatic conditions and vegetation cover influence water flux in a dike, and potentially the dike stability. A comprehensive numerical simulation is computationally too expensive to be used for the near real-time analysis of a dike network. Therefore, this study investigates a random forest (RF) regressor to build a data-driven surrogate for a numerical model to forecast the temporal macro-stability of dikes. To that end, daily inputs and outputs of a ten-year coupled numerical simulation of an idealised dike (2009–2019) are used to create a synthetic data set, comprising features that can be observed from a dike surface, with the calculated factor of safety (FoS) as the target variable. The data set before 2018 is split into training and testing sets to build and train the RF. The predicted FoS is strongly correlated with the numerical FoS for data that belong to the test set (before 2018). However, the trained model shows lower performance for data in the evaluation set (after 2018) if further surface cracking occurs. This proof-of-concept shows that a data-driven surrogate can be used to determine dike stability for conditions similar to the training data, which could be used to identify vulnerable locations in a dike network for further examination.

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Analytical Method for Predicting the Mobility of Slow-Moving Landslides owing to Groundwater Fluctuations

Cited by 33 publications

References 14 publications

Analyzing the Effect of Soil Hydraulic Conductivity Anisotropy on Slope Stability Using a Coupled Hydromechanical Framework

Analyzing the Effect of Soil Hydraulic Conductivity Anisotropy on Slope Stability Using a Coupled Hydromechanical Framework

Study on the Stability of the Geogrids-Reinforced Earth Slope under the Coupling Effect of Rainfall and Earthquake

A Data-Driven Surrogate Approach for the Temporal Stability Forecasting of Vegetation Covered Dikes

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