Numerical Simulation Of Evacuation Optimization Scheme In An Underground Park

Firstly,this paper uses Pathfinder software to model ten fire prevention zones in five areas of an underground park,and analyses the simulation results.Then,according to the simulation results,the location of evacuation bottleneck is improved.At the same time,in order to balance the evacuation number of stairs,evacuation indication signs and personnel management are improved in different areas.On the premise of function,there are several evacuation buffers in each fire zone,which can not only reduce the possibility of new evacuation bottlenecks,but also reduce the evacuation time.Finally,a set of emergency evacuation plan is proposed for each zone.For Area A,the evacuation time has been reduced from 1389.5 seconds to 694.5 seconds after the removal of some obstacles,the increase of evacuation doors at key locations,the refinement of evacuation indication signs and the setting of evacuation buffer zone.A total of 8348 people have been evacuated.For Area B,the location of evacuation bottleneck has been eliminated and balanced.The total evacuation time was reduced from 1578.3 seconds to 1032 seconds after the measures of increasing evacuation buffer zone and the number of evacuation people at each safe exit.For area C,after optimizing the model,the total evacuation time was reduced from 1289 seconds to 763 seconds,totally 763 people were evacuated.Area D evacuation area was small,staircase layout was reasonable,and obstacles were evacuated.Less,the total evacuation time is only 454.5 seconds;area E has more stairs,wider corridor width,smaller evacuation distance,and little safety evacuation problem.The results show that in the process of evacuation in underground space,reasonable layout of evacuation indication signs and appropriate location of evacuation buffer are very helpful to balance the number of evacuation people at all safe exits.