Safety Evaluation of Open Cut Excavation Work

  • ITOH Kazuya
    Construction Safety Research Group, National Institute of Occupational Safety and Health
  • TOYOSAWA Yasuo
    Department of Research Planning and Coordination, National Institute of Occupational Safety and Health
  • MAE Ikuo
    Former National Institute of Industrial Safety
  • TAKAHASHI Akihiro
    Department of Civil Engineering, Tokyo Institute of Technology
  • TAKEMURA Jiro
    Department of Civil Engineering, Tokyo Institute of Technology
  • KUSAKABE Osamu
    Department of Civil Engineering, Tokyo Institute of Technology

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Other Title
  • 明かり掘削における掘削面の高さと勾配の安全性評価―掘削面の勾配と高さの基準制定に至る歴史的背景―
  • ―掘削面の勾配と高さの基準制定に至る歴史的背景―

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Description

Most labor accidents during open cut excavation work are caused by slope failure, and the importance of countermeasures has long been recognized. Standards for the gradient of excavation surfaces were established in 1965 following an amendment by the Ordinance on Industrial Safety and Health, Japan. This paper introduces the regulations and design standards for the gradient of excavation surfaces for each institution. The historical background of enactment is investigated and some numerical analyses are carried out regarding the standard for the gradient of excavation surfaces, which is covered by Articles 356 and 357.

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