Publications by authors named "Nobutaka Hiraoka"
Article Synopsis
- Slope failures during or right after slope-cutting can lead to serious accidents, prompting this study to examine labor accidents linked to these failures in Japan.
- The study advocates for a slope guideline by the MHLW to prevent such accidents and includes a case study showcasing its application during slope-cutting and nailing for improved safety.
- Monitoring methods are suggested to understand slope deformation better, while a checklist within the guideline allows for quick assessments and collaborative problem-solving among clients, designers, and contractors.
In February 2012, a serious accident which resulted in five fatalities happened during a TBM-tunnel construction under the seabed in Japan. The cause of the accident appeared to be due to the Key-segment slipping out of the segment ring by the thrusting tailskin (wire brushes) of the TBM into the segment ring. This resulted in the collapse of the rings, causing the seabed ground and seawater to flow into the tunnel.
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