Simulation method of construction personnel evacuation under tunnel rock caving disaster
In the process of tunnel construction,safety accidents such as rock caving are common dan-gerous situations.In order to comprehensively consider the impact of dynamic dangerous obstacles such as rock collapse on the emergency evacuation of construction personnel in the tunnel,this study select-ed a railway tunnel project in a plateau area as the research object,used cellular automata theory(CA)to build a trajectory interaction model between personnel and dynamic dangerous obstacles(such as rock fall)in the tunnel,and developed a personnel evacuation simulation method when rock collapse occurred.On the basis of this,the numerical simulation of and the discussion about the emergency e-vacuation process under different disaster levels and ranges of rock mass collapse in the tunnel were carried out.The results show that the numerical simulation method developed in this paper can accu-rately simulate the evacuation process and casualties under different disaster levels.According to the simulation results,when a rock mass collapse accident of the same level occurs,with the expansion of the disaster scope,the number of injured people increases,and the overall evacuation speed slows down,resulting in a prolonged evacuation time.At the same time,the disaster level is also the main fac-tor affecting the safety of construction personnel.The higher the disaster level,the greater the density of collapsed rock blocks,thus increasing the probability of injury and death of disaster prone groups.The evacuation model provides a reference for emergency evacuation of construction personnel under tunnel disaster conditions.
万方数据
维普
