【摘要】 本文以广州市天河智慧城盾构段综合管廊为研究对象，分析盾构管廊通风区间长度对管廊内风速的影响。基于风速设计不同的排烟工况，并利用PyroSim软件模拟分析得到不同工况下廊舱内的能见度、烟气蔓延、温度变化、一氧化碳浓度等排烟评价指标的变化情况，通过不同时刻的指标对比进而评价、比较不同工况下的排烟效果，得出经济合理有效的通风风量范围。结果表明：通风风量在10 m~3/s以上时通风排烟效果较好，且随着通风风量的增加，通风排烟过程显著加快；在通风风量大于20 m~3/s时，能起到良好的通风排烟效果，且通风风量继续增加，加快的通风排烟过程有限；20～25 m~3/s为1 000 m通风区间长度下盾构综合管廊的最优通风量范围。更多还原

【Abstract】 Taking the comprehensive pipe gallery of the shield section of Guangzhou Tianhe Smart City as the research object, the influence of the length of the ventilation section of the shield pipe corridor on the wind speed in the pipe corridor was analyzed. Different smoke exhaust conditions are designed based on the design wind speed, and the changes in the smoke exhaust evaluation indicators such as visibility, flue gas spread, temperature change, and carbon monoxide concentration in the corridor cabin under different working conditions are obtained by using PyroSim software simulation analysis. By evaluating comparison of indicators at different moments and comparing the smoke exhaust effect under different operating conditions, the economical and reasonable and effective ventilation air volume range is obtained. The results show that the ventilation and smoke exhaust effect is better when the ventilation air volume is above 10 m~3/s, and with the increase of ventilation air volume, the ventilation and smoke exhaust process is significantly accelerated. When the ventilation air volume is greater than 20 m~3/s, it can play a good ventilation and smoke exhaust effect, and the ventilation air volume continues to increase, and the accelerated ventilation and smoke exhaust process is limited; 20～25 m~3/s is the optimal ventilation range of the shield comprehensive pipe gallery under the length of the 1 000 m ventilation interval.更多还原