城市环隧横向排烟烟气控制试验研究

Experiment analysis of smoke control of UTLT applied full transverse ventilation system

通过进行城市地下交通联系隧道内全尺寸火灾试验,研究了横向排烟方式下不同烟气控制模式下影响烟气蔓延因素,包括火灾规模、烟控模式等。结果表明:设计的烟控方案在火灾初期可有效控制火灾规模增大导致产烟量大的影响;"中间排、两边补"烟控模式下的浓烟区厚度相比"上游补、下游排"更为稳定;采用均匀的排烟口布置,可有效克服机械补风方向不同、机械补风量占排烟量的比例不同等所带来的影响。

Based on a full scale fire experiment in the underground traffic linked tunnel(UTLT),the factors affecting the smoke spread under different smoke control strategies were analyzed.In the early stage of fire,experimented strategies can effectively con-trol the influence of bigger fire size accompanied with more smoke production.The thickness of smoke under the strategy of"middle exhaust and two sides supply"is more stable than"upstream supply and downstream exhaust".With uniform arrangement of smoke ex-haust vents,the influence of different direction of mechanical venti-lation and the ratio of mechanical ventilation volume to smoke ex-haust volume could be solved effectively.