• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2018 Fiscal Year Final Research Report

Construction of landslide scenario and advancement of elastic wave monitoring for slope disaster mitigation

Research Project

  • PDF
Project/Area Number 15H02996
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Natural disaster / Disaster prevention science
Research InstitutionRitsumeikan University

Principal Investigator

Kawakata Hironori  立命館大学, 理工学部, 教授 (80346056)

Co-Investigator(Kenkyū-buntansha) 土井 一生  京都大学, 防災研究所, 助教 (00572976)
山田 卓  大阪市立大学, 大学院工学研究科, 准教授 (70451789)
後藤 浩之  京都大学, 防災研究所, 准教授 (70452323)
Project Period (FY) 2015-04-01 – 2019-03-31
Keywords地すべり / 弾性波透過 / 現場モニタリング / 土層試験
Outline of Final Research Achievements

This study has been conducted to establish how to monitor the status of the slope using the elastic waves transmitting under the slope surface where landslide is concerned to occur.
For in situ monitoring, we radiated weak elastic waves over a wide frequency range so that status of slope was not affected. We successfully recorded transmitted waves by high sensitivity accelerometer array observation.
In laboratory, elastic wave measurement transmitting through unconsolidated soil was performed as an element test. An increase in phase velocity with decrease in water head was observed during the drying process of the medium, and this change preceded from lower frequencies.

Free Research Field

地震学、弾性波動論

Academic Significance and Societal Importance of the Research Achievements

地すべりや大規模崩壊等による斜面災害の発生予測は、学術的にも社会的にも重要な課題である。特に、降水に伴う地すべりについては、実際の降水に対して斜面状態を適切に常時モニターすることにより斜面災害の発生予測に役立てることが肝要である。広周波数帯域の弾性波モニタリングは、周波数ごとに感度を持つ領域の広がりが異なるという理論的な裏付けもあり、降水による媒質の湿潤状況の時空間分布の変化を詳細に把握する上で有用であることが、本研究によって示唆された。

URL: 

Published: 2020-03-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi