Risk Analysis of Collapse during Construction for a Subway Transfer Station with Large Span and Small Clearance

Collapse is a common accident during underground engineering construction. Risk analysis of collapse during construction for a subway transfer station with large span and small clearance is done by using theory of risk analysis, for preventing collapse accidents during construction effectively. Considering the difficulties of construction of the station, the risk assessment system is proposed. Using Analytic Hierarchy method (AHP) to analyze the collapse risk. Then it's major risk factors and collapse risk's level is gained, and some corresponding measures are proposed.