成都地铁浅埋区间隧道自然通风排烟方式的热烟试验研究

The hot smoke test on nature smoke exhaust in Chendu Metro's shallow-burying intersectional tunnel

区间隧道采用自然通风的方式进行排烟在国内尚属首次。采用热烟试验方法在建成的实体隧道现场,验证了成都地铁浅埋区间隧道现有的通风竖井间距和通风面积能够满足隧道排烟的要求。烟层高度高于人体特征高度,烟气通过区间隧道最近的两个通风竖井排出,烟气蔓延区域控制在两个通风竖井之间,来自隧道内外的自然风对排烟效果的影响不大。

Nature smoke exhaust in metro＇s shallow-burying intersectional tunnel is the first time in China. In the paper, the author get a smoke test in Chengdu Metro＇s shallow burying interseetional tunnel, and validated that the existed ventilation shaft interval and area can he content with the demand of the tunnel smoke exhaust. The smoke layer level is higher than the human body height. The smoke flow exhausts from the nearest ventilation shaft, and the smoke filled zone is controlled between two ventilation shafts. The wind in and out the tunnel has small influence to exhaust effect.