Stability Evaluation of Volcanic Slope Subjected to Rainfall and Freeze-Thaw Action Based on Field Monitoring

Kawamura, Shima; Miura, Seiichi

doi:10.1155/2011/867909

Cited by 7 publications

(3 citation statements)

References 13 publications

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“…The differences in deformation behavior due to the change in the initial water content were also not recognized for the other volcanic slopes subjected to freezing and thawing. A similar tendency was also observed in field monitoring data on a cut slope in Hokkaido, Japan (Kawamura & Miura, 2011). Figure 23.…”

Section: Rainfall-induced Failures Of Volcanic Slopes Subjected To Frsupporting

confidence: 83%

Stability of Volcanic Slopes in Cold Regions

Kawamura¹,

Miura²

2014

JGG

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Rainfall-and earthquake-induced failures of slopes formed by volcanic soils occur frequently in Hokkaido, Japan. This study aims at clarifying failure mechanisms of volcanic slopes caused by both rainfall and freeze-thaw action in cold regions such as Hokkaido. Additionally, the mechanical behavior of volcanic slopes pre-deformed due to cyclic loadings such as seismic loadings were examined to elucidate the effect of initial water content on rainfall-induced failure of volcanic slopes. Using model slopes of different shapes constructed with volcanic soils, a series of model tests was conducted under several conditions in which spray nozzles and a shaking table were used to simulate rainfall intensity and cyclic loadings. Test results showed that surface failure of volcanic slopes differed depending strongly on their initial moisture content. Based on the results of model testing, the effects of freezing and thawing and cyclic loadings on mechanisms of rainfall-induced failure were drawn upon to propose an evaluation method for slope stability. The model test results indicated that rainfall-induced failure can be uniquely assessed by changes in water content in zones subjected to freezing and thawing or to shearing deformation due to cyclic loadings.

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Section: Rainfall-induced Failures Of Volcanic Slopes Subjected To Frsupporting

confidence: 83%

Stability of Volcanic Slopes in Cold Regions

Kawamura¹,

Miura²

2014

JGG

Self Cite

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“…Another field study conducted by Kawamura and Miura (2011) assessed the freeze-thaw behavior of slopes composed of volcanic soils in Japan. The aim of this study was to develop a way to predict slope failures using monitoring techniques.…”

Section: Freeze-thaw Impacts On Slopesmentioning

confidence: 99%

A Study of the Impacts of Freeze–Thaw on Cliff Recession at the Calvert Cliffs in Calvert County, Maryland

2014

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“…Generally, sensors such as time-domain reflectometry (TDR) and frequencydomain reflectometry (FDR) are used to monitor the water content of soils. e TDR sensors can measure the water content with high accuracy, but they are expensive [3][4][5][6][7]. e FDR sensors, on the other hand, are inexpensive but require site-specific calibration [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Calibration Method for Field Application of UAV‐Based Soil Water Content Prediction Equation

Kim

Son

Park

et al. 2019

Advances in Civil Engineering

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The objective of this study is to monitor the water content of soil quickly and accurately using a UAV. Because UAVs have higher spatial and temporal resolution than satellites, they are currently becoming more useful in remote sensing areas. We developed a water content estimation equation using the color of the soil and suggested a calibration method for field application. Since the resolution of the images taken by the UAV is different according to the altitude, the water content estimation formula is developed by using the images taken at each altitude. In order to calibrate the color difference according to lighting conditions, the calibration method using field data were proposed. The results of the study showed an altitude-specific estimation equation using RGB values of the UAV image through linear regression. The appropriate number of field data needed for calibration for site application of the estimation equation was found between 4 and 10. On-site application results of the proposed calibration method showed RMSE accuracy of 1.8 to 2.9%. Thus, the water content estimation and calibration method proposed in this study can be used in effectively monitoring the water content of soil using UAVs.

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Stability Evaluation of Volcanic Slope Subjected to Rainfall and Freeze-Thaw Action Based on Field Monitoring

Cited by 7 publications

References 13 publications

Stability of Volcanic Slopes in Cold Regions

Stability of Volcanic Slopes in Cold Regions

A Study of the Impacts of Freeze–Thaw on Cliff Recession at the Calvert Cliffs in Calvert County, Maryland

Evaluation of Calibration Method for Field Application of UAV‐Based Soil Water Content Prediction Equation

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