Analysis of Abnormal Detection Data of Fire Accident in Power Cable Tunnel and Field Test Study on Characteristic Parameters of Tunnel Fire

With the continuous expansion of urban cable scale and increase in service time, fire accident risk tunnels also increases. Defects configuration prevention measures lead to many accidents seriously affect reliability power supply. First, detection data a typical tunnel are analyzed this study. The results show that main problems unreasonable installation position extinguishers, lack between intermediate joints, insufficient performance interlayer barriers. Then, field test is carried out be put into operation. high-temperature area mainly concentrated on top tunnel, suspension height extinguisher will trigger time. energy short circuit large, burns spreads rapidly, delayed triggering may large extinguish effectively. Comparing simulation abnormal characteristic parameters fire, temperature error less than 4%. development curve obtained through simulation, burner set extinguishing devices. Finally, optimal scheme anomaly equipment fire-extinguishing products proposed. drop rate increases by 135%.