Abstract: This paper focuses on the T- shaped underground pipe gallery. FDS software was used to simulate the spread of cable fire in the pipe gallery under different fire source locations and wind speed conditions. The temperature field of the pipe gallery and the spread behavior of smoke after the fire were analyzed. The fire hazards at different locations in the T-shaped pipe gallery were sorted.When the wind speed inside the pipe corridor is 1.5 m/s and the cable is in a stable burning period, the height of the smoke layer at the intersection is the lowest. The characteristics of smoke at the intersection of T-shaped pipe gallery were obtained. The results of this work can provide some reference for fire safety design of Tshaped underground pipe gallery.

Key words: T-shaped pipe gallery, cable fire, numerical simulation;temperature field;smoke spread