Abstract: In order to solve the problem of casualties caused by fire accidents in the construction process of underground comprehensive pipe gallery,taking the construction site of an underground comprehensive pipe corridor in Xi'an as an example, numerical simulation study on related fire scenarios and personnel evacuation was carried out. The change of parameters such as temperature, flue gas concentration and visibility at each measuring point in the integrated pipe corridor was studied by setting different fire source position to simulate the fire process. The time that each parameter reaches the critical value first is taken as the available evacuation time TASET.The evacuation situation in the same scene was simulated to get the necessary evacuation time TRSET. Whether the personnel in different fire sources can be evacuated safely was determined through the comparison of two evacuation times. Two kinds of optimization evacuation plan were proposed to improve the evacuation rate on the basis of the research.

Key words: fire protection, underground pipe gallery, fire simulation;personnel evacuation, optimization