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  Detection of Dangerous Points and Behavioral Modification from Environmental Change by Behavior Analysis Procedure under the Safeguarding Supportive System (SSS) at a Tunnel Construction Site

  Accidents at tunnel construction sites in Japan rapidly decreased because of development of construction technology and/or promotion of machinery construction. However, the tunnel accident elicits fatal result if once accident occurs because safety at many tunnel work-sites in Japan are still dependent on workers attentiveness. It might be important to analyze behavioral pattern of workers and to apply some intervention procedure for increasing safety behavior and decreasing unsafe behavior. Though our final goal is effective introduction of the Safeguarding Supportive System which was established in our project to tunnel construction site, as a pilot study, we videotaped and analyzed behavior of tunnel worker. We detected dangerous points of tunnel site from videotape, which were intersection points of workers and/or machines. The degree of danger to workers increases as they are closer to the intersections. Then intervention trial, which changed environment using a procedure of behavioral analysis, was applied to tunnel construction site for decreasing dangerous intersections. Results in the present study suggested that the intervention procedure effectively affected behavior change of workers. Also, results showed that it was sometimes possible to change behavior by change of environment, not only direct approach. We concluded that behavioral analysis procedure might be one of the most effective measure to contribute to safety in tunnel construction sites.

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