Development of anchor equiped with distributed fiber optic sensor for prediction of landslides

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H05350
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Natural disaster / Disaster prevention science
• Research Institution: Shimane University
• Principal Investigator: Kogure Tetsuya 島根大学, 総合理工学研究科, 助教 (70534006)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 光ファイバー / 地すべり / モニタリング / ボーリング孔

Outline of Final Research Achievements

Fiber optic cable was installed into a vertical borehole with its depth of 16 m in a landslide. Strain changes along the borehole were measured from June to October 2017 with spatial resolution of 10 cm. Results show that strain clearly increased with rainfall events. Distinctive strain changes are found at the depths of (1) 1－5 m, (2) approximately 8 m, and (3) 14－15.5 m. The strain changes around 8 m appear to show a deformation of the slip plane. This study has developed a promising geophysical method which can become a major current for landslide monitoring.

Free Research Field

自然災害科学