| The subsea tunnel is not only directly connected to the land,but also less affected by meteorological conditions,and has strong seismic performance and combat readiness significance.With the acceleration of urbanization,increasingly subsea tunnels are being built and planned in our country.Compared with other methods such as shield method,the immersed tube method is generally used to construct extra-long subsea tunnels with wider cross-sections.However,if a fire accident occurs in an immersed tube tunnel,it will be very difficult to exhaust smoke and evacuate,which leads to the specificity of the emergency rescue system of the immersed tube tunnel.Therefore,in order to avoid the severe consequences of the tunnel fire,it is necessary to study the fire emergency rescue system of the immersed tube tunnel.Firstly,this paper describes the fire accidents of immersed tube tunnels at home and abroad,analyzes the necessity of research on the fire emergency rescue system of submarine immersed tube tunnels,and summarizes the current status of related research at home and abroad by consulting a large number of related documents.Secondly,the relevant theories of safety risk early warning and emergency rescue management are analyzed,and then gives a brief description of the risk analysis method and the model algorithm according to the characteristics of tunnel fire development,and the engineering background of the thesis research is introduced.Thirdly,a combination of multiple analysis methods is used to conduct a comprehensive risk assessment on the risk factors of each rescue stage after the immersed tube tunnel is fired,and then put forward the standard for graded early warning of the assessment results to ensure the reliability of the emergency rescue system.Finally,the immersed tube tunnel fire emergency rescue plan is deeply studied,and the Ant Colony Algorithm is used to optimize the evacuation path,which provides a reference for the emergency rescue of other immersed tube tunnels. |
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