In tunneling work assessment of risks to be encountered in occupational health and safety and hazard analysis

Tunnel construction stages have been identified primarily in this study which is one of the heaviest and most dangerous part of the construction works. Then the hazards and risks that could be encountered in terms of occupational health and safety were then determined for each of these identified stages. A description of the planned preventive actions to remove the risks has been made. For this purpose a questionnaire was prepared for 35 different fields of activity involved in tunnel constructions stages. These questionnaires were send to 5 different occupational health and safety expert to identify risk preventive actions and hazards using binary comparison according to their importance level. This study is carried out in Bahçe-Nurdağı high speed train project that has 2 tunnels each is 10 kilometers in length. With the studies done in the project, it is aimed to determine the order of precedence according to the importance level of the hazards, risk preventive actions detected in tunnel construction stages. Throughout the result of this study awareness about the type and level of risks and hazards in tunnel works has increased. Therefore, risk of death and injury may be minimized and thus tunnel works can be completed at desired time and conditions.