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Development of Remote Hammering Testing Method for Structures Using Water Jet

Research Project

Project/Area Number 16K06471
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Structural engineering/Earthquake engineering/Maintenance management engineering
Research InstitutionKumamoto University

Principal Investigator

Mori Kazuya  熊本大学, 大学院先端科学研究部(工), 教授 (50190989)

Co-Investigator(Kenkyū-buntansha) 徳臣 佐衣子  熊本大学, 大学院先端科学研究部(工), 特別研究員 (40646121)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords非破壊検査 / コンクリート / うき・剥離 / 遠隔検査 / ウォータジェット / 打音検査 / 構造物 / 壁面
Outline of Final Research Achievements

We have developed a remote nondestructive testing method: Water Jet Impact Acoustic Method in which the traditional hammer has been replaced with a water jet. In this new method, objects are pounded by water droplets at regular intervals. Hidden voids in the concrete can be detected as they produce a distinctive sound that is picked up by a gun microphone. The characteristics of the Water Jet Impact Acoustic Method are moving inspection, low-cost device, and safety inspection. An artificial defect with a diameter of 400 mm can be detected while the inspection device was moved at a speed of 1 m per second. This inspection speed is 3,600 square meters per day (10 hours), and inspection of 10,000 square meters per day is also possible using multiple water jets.

Academic Significance and Societal Importance of the Research Achievements

トンネルや橋梁の点検は5年毎の点検が義務付けられているが,点検を要する橋梁は約70万橋,トンネルは1万箇所ある.さらに中間時の点検も要求され,その労力・コストは膨大である.そのため,作業者による打音検査に代わる経済的で効率的な検査方法が望まれている.効率的な検査方法として,赤外線サーモグラフィ法,レーザ加振法などがあるが,使用環境や経済性の問題のために一般的な方法とはなっていない.
本研究で開発した水撃音響法は,従来作業者がハンマーで叩いていた作業をウォータジェットに置き換えたもので,低コストで高効率を実現した.水の確保などまだ実用化には課題があるが,安全な社会資本を支える技術となるものである.

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (13 results)

All 2019 2018 2017 2016 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 1 results,  Acknowledgement Compliant: 2 results) Presentation (7 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results) Remarks (1 results)

  • [Journal Article] ウォータージェットによる構造物の遠隔打音検査2019

    • Author(s)
      森 和也,徳臣佐衣子
    • Journal Title

      電気学会誌

      Volume: 139 Pages: 292-295

    • NAID

      130007640907

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] ウォータジェットによる構造物の非破壊検査法:水撃音響法の走行試験2018

    • Author(s)
      森 和也,徳臣佐衣子
    • Journal Title

      検査技術

      Volume: 23 Pages: 1-6

    • NAID

      40021684533

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] ウォータジェットを用いた打音試験法(水撃音響法)の走行試験2017

    • Author(s)
      森 和也,徳臣 佐衣子
    • Journal Title

      コンクリート工学年次論文集

      Volume: 39 Pages: 1897-1902

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] ウォータジェットを用いた打音試験法(水撃音響法)の走行試験2017

    • Author(s)
      森 和也,徳臣 佐衣子
    • Journal Title

      コンクリート工学

      Volume: 39

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Proceedings of ICMP 20172017

    • Author(s)
      Kazuya Mori , Saeko Tokuomi
    • Journal Title

      NONDESTRUCTIVE TESTING METHOD FOR CONCRETE STRUCTURES BY USING WATER JET

      Volume: 未定

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] A New Remote Non-destructive Testing Method for Concrete Structures Using Water Jet Impact2019

    • Author(s)
      Kazuya Mori
    • Organizer
      4th International conference on Structural Engineering and Concrete Technology
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Running Test of Water Jet Impact Acoustic Method2018

    • Author(s)
      Kazuya Mori
    • Organizer
      The Sixth Japan-US NDT Symposium
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] NONDESTRUCTIVE TESTING METHOD FOR CONCRETE STRUCTURES BY USING WATER JET BY USING WATER JET2017

    • Author(s)
      Kazuya Mori, Saeko Tokuomi
    • Organizer
      Proceedings of the JSME/ASME 2017 International Conference on Materials and Processing
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] ウォータージェットによる構造物の遠隔打音検査2017

    • Author(s)
      森 和也,徳臣 佐衣子
    • Organizer
      レーザー学会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 水撃音響法の移動試験2017

    • Author(s)
      森 和也,徳臣 佐衣子
    • Organizer
      日本機械学会
    • Related Report
      2017 Research-status Report
  • [Presentation] ウォータジェットを用いた非破壊検査「水撃音響法」における整流効果2016

    • Author(s)
      森 和也
    • Organizer
      土木学会平成28年度全国大会
    • Place of Presentation
      東北大学
    • Related Report
      2016 Research-status Report
  • [Presentation] 水撃を用いた構造物のうき・はく離検出2016

    • Author(s)
      森 和也
    • Organizer
      2016年度日本機械学会年次大会
    • Place of Presentation
      九州大学
    • Related Report
      2016 Research-status Report
  • [Remarks] 水撃音響法

    • URL

      http://www.mech.kumamoto-u.ac.jp/Info/lab/ape/mori/theme-j.files/water.files/water.html

    • Related Report
      2016 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

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