Model experimental study on fire smoke control in underground interchange tunnel
To solve the issues of smoke diffusion control and smoke exhaust airflow organization in the interchange tunnels,the 1∶15 small-scale fire model experimental method of underground interchange tunnel was used to construct the fire simu-lation scenario of interchange tunnel.The smoke distribution and diffusion characteristics under typical ignition locations were analyzed,and the change in smoke hazard parameters in different areas of the main tunnel and ramp were obtained.The smoke control effect of different ventilation modes were compared and analyzed,and the influence of different factors such as the lo-cation of fire source,ventilation and smoke exhaust rate,and opening mode of smoke exhaust outlet on smoke control was stud-ied.The results show that under the natural ventilation mode,an increase in the distance between the fire source and the smoke exhaust duct in the main tunnel will lead to an increase in the diffusion range and accumulation of smoke.Among the three designed ventilation modes,the ventilation mode with two-end smoke exhaust and ramp air supply has the relatively opti-mal smoke control effect.The research results can provide data reference and technical guidance for the smoke exhaust design of underground interchange tunnels.
underground interchange tunnelfiresmall-scale model experimentfire smoke exhaust
万方数据
维普
