不同海拔高度大坡度隧道火灾烟气扩散模拟研究

Simulation of Smoke Diffusion in Large Slope Tunnel Fire at Different Altitudes

随着“成渝”经济圈的崛起,西部山区快速发展,不同海拔高度的大坡度隧道工程快速建设。为明确不同海拔高度大坡度隧道火灾工况自然风场景下烟气扩散规律,本文基于FDS平台对不同海拔高度下大坡度隧道火灾场景进行三维仿真模拟,以温度场、可视度场为分析指标进行分析,从而得到不同海拔高度下大坡度隧道火灾烟气扩散、温度变化以及可视度变化规律。研究成果可以为隧道的防灾减灾设计、施工提供技术支持,可用于优化风机布置方案,从而达到节能降耗、安全运营的效果。

With the rise of the"Chengdu-Chongqing"economic circle,the western mountainous areas have developed rapidly,and large slope tunnel projects at different altitudes have been rapidly constructed.In order to clarify the smoke diffusion law under the natural wind scene of large slope tunnel fire conditions at different altitudes,the three-dimensional simulation of large slope tunnel fire scenes at different altitudes is carried out based on the FDS platform,taking the temperature field and visibility field as the analysis indexes,the smoke diffusion,temperature change and visibility change laws of large slope tunnel fire at different altitudes are obtained.The research results can provide technical support for the design and construction of disaster prevention and mitigation of tunnels,it can be used to optimize the fan layout scheme,so as to achieve the effect of energy saving,consumption reduction and safe operation.