Research and Application of Safety Risk Control Method in Plateau Tunnel Construction

In order to prevent and control plateau tunnel construction safety accidents, the article analyzes the source of the plateau tunnel construction safety risk, and for the first time systematically constructs the plateau tunnel construction safety risk evaluation index system. The indicator system consists of 5 first-level indicators and 35 second-level indicators. Next, the article combines optimized analytic hierarchy process（OAHP）and information entropy weight method to construct a weight calculation combination model, and organically integrates it with matter-element extension theory to construct a safety risk assessment model for plateau tunnel construction. Finally, using the index system and model to conduct empirical research on the construction of the Xinwushaoling tunnel project, it is concluded that the construction safety risk level is level 1, that is, "low risk". The evaluation result is consistent with the actual safety situation, indicating that the index system and model are suitable for the safety risk evaluation of plateau tunnel construction. Through correlation analysis, this article puts forward construction safety risk control measures for hidden safety risks, and provides a method for safety risk control of plateau tunnels and underground engineering construction.