Risk rank and emergency management of major hazard installations for highway tunnel construction

In order to better manage major hazard installations of highway tunnel construction, risk rank model of major hazard installations for highway tunnel construction is established, and critical mass N of the risk degree for highway tunnel construction is determined, which distinct general hazard installations and major hazard installations. On the basis of it, classification management model of major hazard installations for highway tunnel construction is established, which include government management model and enterprise management, which has some reference value on the construction industry.