Evaluation of Retrofitting Methods for Underground Structures against Explosion Threats Using the Analytical Hierarchy Process (AHP) Method

In this research، to evaluate proper retrofitting methods for underground structures against explosion threats، some methods including the use of polymer fibers، creating empty tunnel as explosive traps، use of explosive slabs، dampers، and polystyrene materials، and creating pocket and ample curves are identified using library resources. Then، by interviewing with experts in the field of civil، tunneling and construction management، all the issues for assessing differences and influencing methods on retrofitting methods for underground structures have been extracted.