A STUDY OF ESCAPE TIME FROM AN UNDERGROUND STREET IN A MOUNTAINOUS CITY

Taking the underground street in Three Gorges Plaza in the Shapingba District, Chongqing, as an exam-ple, the present study focused on a densely populated underground street downtown in a mountainous city, in which the issue of emergency evacuation in case of fi re was discussed. The total evacuation number could be worked out according to the ‘method of trip generation rate’; the length of escape routes and the width of escape exits were counted, and the maximum capacity of people for each emer-gency exit was calculated according to the unit capacity. Based on the above data, the escape route was built by the iterative programming algorithm so as to check the safety of the current underground street in the mountainous city, in order that technical support can be provided for effective countermeasures. Thus, the emergency evacuation capability of a downtown underground street in a mountainous city can be enhanced