Journal of Occupational Safety and Health
Online ISSN : 1883-678X
Print ISSN : 1882-6822
ISSN-L : 1882-6822
Safety Evaluation of Open Cut Excavation Work
— The Historical and Theoretical Backgrounds of Enacting Standards for the Gradient of Excavation Surfaces —
Kazuya ITOH, Yasuo TOYOSAWA, Ikuo MAE, Akihiro TAKAHASHI, Jiro TAKEMURA, Osamu KUSAKABE
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Keywords: ordinance on Industrial Safety and Health Articles 356 and 357, gradient of excavation, height of excavation, rigid plastic finite element analysis, occupational safety
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2010 Volume 3 Issue 2 Pages 103-110

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Abstract
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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© 2010 National Institute of Occupational Safety and Health
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