INVESTIGATION AND STABILITY ANALYSIS OF SLOPE FAILURE AT EXTREMELY SHALLOW LAYER AFTER SNOWMELT IN SNOWY COLD REGIONS

Authors

  • Naoki Miura Graduate School of Engineering, Kitami Institute of Technology
  • Dai Nakamura Kitami Institute of Technology
  • Takayuki Kawaguchi Kitami Institute of Technology
  • Shunzo Kawajiri Kitami Institute of Technology

Keywords:

Snowy cold region, Slope failure, Direct shear test, Slope stability analysis

Abstract

In snowy cold regions such as Hokkaido, slopes can collapse owing to the frost heave phenomenon, freeze-thaw actions in winter, or snowmelt in spring. Kitami City in Hokkaido recently suffered from such slope failures when the extremely shallow layer eroded and slid after snowmelt in the early spring of 2020. The depth of this slope failure was about 0.20 to 0.25 m, which was very shallow compared with general surface failures. In this research, we conducted a site investigation of the road slope and collected undisturbed soil samples from a non-collapsed area near the slope failure to conduct a constant pressure direct shear test. For the direct shear tests, specimens with natural water content at the time of sampling and forcibly saturated specimens were used. The results of the slope stability analysis with the strength parameters obtained from the direct shear test showed that the slope failure was caused by snowmelt penetration, mainly due to a decrease in cohesion.

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Published

2022-04-02

How to Cite

Miura, N. ., Nakamura, D., Kawaguchi , T. ., & Kawajiri, S. . (2022). INVESTIGATION AND STABILITY ANALYSIS OF SLOPE FAILURE AT EXTREMELY SHALLOW LAYER AFTER SNOWMELT IN SNOWY COLD REGIONS . GEOMATE Journal, 22(92), 109–115. Retrieved from https://geomatejournal.com/geomate/article/view/1343