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Experimental study on pressure of collapsed soil at bury in shallow depth

Research Project

Project/Area Number 16K01306
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Social systems engineering/Safety system
Research InstitutionNational Institute of Occupational Safety and Health,Japan

Principal Investigator

Tamate Satoshi  独立行政法人労働者健康安全機構労働安全衛生総合研究所, 労働災害調査分析センター, センター長 (10344243)

Co-Investigator(Kenkyū-buntansha) 堀 智仁  独立行政法人労働者健康安全機構労働安全衛生総合研究所, 建設安全研究グループ, 主任研究員 (20508634)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords労働安全 / 建設工事 / 土砂崩壊 / 生き埋め事故 / 保護具の開発 / 人的被害の軽減 / 溝掘削工事 / 地盤工学 / 被災防止 / 土圧 / 保護具 / 実大模型実験 / 人型供試体 / 労働災害
Outline of Final Research Achievements

This study aims to develop a chest protector for saving construction workers lives at trench excavations. There were heavy casualties by collapsed soil even in shallow trenches. Structural requirements of the chest protector were studied for prevention of labor accidents. Main results of the study are summarized as follows.
First, maximum allowable pressure and strain in the chest of human body are estimated from the experimental records on rats and dogs in the past. Second, actual pressure of collapsed soil was measured by using a humanoid specimen in several sets of full-scale model tests. Third, the developed chest protector was composed of four parts of a cantilever beam system. Fixed beam ends were hold between a back of human body and a trench wall.
Accordingly, the developed system contributes for smooth action at usual construction works in addition to firm protection of chests from collapsed soil at trench failures.

Academic Significance and Societal Importance of the Research Achievements

自然材料が堆積した地盤の強度や構造は予測が難しく溝掘削中の土砂崩壊による労災事故が後を絶たない.過去に発生した事故の占有割合を調べると大規模工事よりもむしろ小規模掘削中に多い.特に深さ1.5m以下の浅い掘削は土止め設置を強制することが難しく,安全には自主的な対策も不可欠と言える。
そこで本研究では簡易な対策の一つとして,作業者がたとえ土砂の生き埋めとなっても人的被害を防止する保護具について検討した.その結果,常時の運動しやすさと埋没時の堅固さの両方を兼ね備えた保護具を提案することができた。したがって、本研究の成果は労災事故が多い小規模工事での人的被災を軽減する社会的意義を有すると考えられる。

Report

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

    (13 results)

All 2018 2017 2016

All Journal Article (6 results) (of which Peer Reviewed: 1 results,  Acknowledgement Compliant: 2 results) Presentation (6 results) (of which Int'l Joint Research: 1 results) Book (1 results)

  • [Journal Article] 土砂崩壊による胸部圧迫の軽減保護具に関する実験的考察2018

    • Author(s)
      玉手聡、堀智仁
    • Journal Title

      安全工学シンポジウム2018講演予稿集

      Volume: - Pages: 360-363

    • Related Report
      2018 Annual Research Report
  • [Journal Article] A combined study of centrifuge and full scale models on detection of threat of failure in trench excavations2018

    • Author(s)
      Satoshi Tamate and Tomohito Hori
    • Journal Title

      Physical Modelling in Geotechanics

      Volume: 2 Pages: 1463-1468

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 溝肩付近における崩壊予兆の簡易計測実験2018

    • Author(s)
      玉手聡、堀智仁
    • Journal Title

      第53回地盤工学研究発表会講演概要集DVD

      Volume: - Pages: 2017-2018

    • Related Report
      2018 Annual Research Report
  • [Journal Article] 建設業における労働災書と土砂崩壊災害の傾向2017

    • Author(s)
      玉手聡、堀智仁
    • Journal Title

      安全工学シンポジウム2017講演予稿集

      Volume: なし Pages: 400-403

    • Related Report
      2017 Research-status Report
  • [Journal Article] 人型供試体を用いた土砂埋没時の圧力計測2016

    • Author(s)
      玉手 聡、堀 智仁
    • Journal Title

      安全工学シンポジウム2016講演予稿集

      Volume: 1 Pages: 452455-452455

    • Related Report
      2016 Research-status Report
    • Acknowledgement Compliant
  • [Journal Article] 土砂生き埋め時の作用圧力に関する実大模型実験2016

    • Author(s)
      玉手 聡、堀 智仁、大西 明宏
    • Journal Title

      第37回バイオメカニズム学術講演会講演予稿集

      Volume: 1 Pages: 213216-213216

    • Related Report
      2016 Research-status Report
    • Acknowledgement Compliant
  • [Presentation] 土砂崩壊による胸部圧迫の軽減保護具に関する実験的考察2018

    • Author(s)
      玉手聡、堀智仁
    • Organizer
      安全工学シンポジウム2018
    • Related Report
      2018 Annual Research Report
  • [Presentation] A combined study of centrifuge and full scale models on detection of threat of failure in trench excavations2018

    • Author(s)
      Satoshi Tamate and Tomohito Hori
    • Organizer
      9th International Conference on Physical Modelling in Geotechnics 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 溝肩付近における崩壊予兆の簡易計測実験2018

    • Author(s)
      玉手聡、堀智仁
    • Organizer
      第53回地盤工学研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 建設業における労働災書と土砂崩壊災害の傾向2017

    • Author(s)
      玉手 聡、堀 智仁
    • Organizer
      安全工学シンポジウム
    • Related Report
      2017 Research-status Report
  • [Presentation] 土砂生き埋め時の作用圧力に関する実大模型実験2016

    • Author(s)
      玉手 聡
    • Organizer
      第37回バイオメカニズム学術講演会
    • Place of Presentation
      富山市
    • Year and Date
      2016-11-12
    • Related Report
      2016 Research-status Report
  • [Presentation] 人型供試体を用いた土砂埋没時の圧力計測2016

    • Author(s)
      玉手 聡
    • Organizer
      安全工学シンポジウム2016
    • Place of Presentation
      東京
    • Year and Date
      2016-07-07
    • Related Report
      2016 Research-status Report
  • [Book] Physical Modelling in Geotechanics2018

    • Author(s)
      Satoshi Tamate and Tomohito Hori
    • Total Pages
      1484
    • Publisher
      CRC Press
    • ISBN
      9781138344228
    • Related Report
      2018 Annual Research Report

URL: 

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

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