高速铁路隧道紧急救援站人员安全疏散可靠性研究OA

This study aims to conduct a reliability analysis of safe evacuation of personnel at emergency rescue stations in high-speed railway tunnels,thereby enhancing safety in disaster prevention,evacuation,and rescue in these tunnels.Based on a literature review and theoretical derivation,the random variables affecting the Available Safe Egress Time(ASET)and the Required Safe Egress Time(RSET)for personnel at emergency rescue stations in high-speed railway tunnels were identified.On this basis,a reliability evaluation model for personnel evacuation at emergency rescue stations in high-speed railway tunnels was established.Finally,the reliability of safe evacuation was calculated using engineering data from an actual emergency rescue station in a high-speed railway tunnel.The results showed that the random variables in the calculation of ASET included the cross-passage spacing within the emergency rescue station,the longitudinal gradient within the station section,the spacing of smoke vents,the fire growth rate,and the total smoke exhaust rate.The random variables in the calculation of RSET included the number of evacuees and the throughput rate of the protective door at the cross-passage.The theoretical calculation models of ASET for personnel evacuation at the emergency rescue station under the smoke-exhaust mode and the no-smoke-exhaust mode were([T])d1=A*+B*α+C*α2+D*Qp+E*Q2p and([T])d2=F*+G*α+H*α2,respectively.In addition,the theoretical calculation model of RSET,[T]d=N*Qc+O*/(P*-Qc)+R*Qc/Nd,comprised three stages:evacuees alighting from the train,evacuees evacuating on the platform of the emergency rescue station,and evacuees queueing at the entrance of the cross passage.Using existing engineering cases,it was determined that,to ensure that personnel safe-evacuation failure is almost negligible,the smoke exhaust rate of the emergency rescue station should be≥285 m3/s.