竖井型城市隧道阻滞交通状况下自然通风模型试验研究

摘要

Hie model of Zhongshandonglu tunnel is built deviding into four segments, based on the peculiarity of pressure distribution in continuous state vertical well and the method of subsectional experiment. The ventilated experiment of the transportation wind pressure on the status of block was carried on, the peculiarity of ventilation in the tunnel and some regulations of ventilation in the vertical well are obtained. The way of evaluating ventilation effect in natural ventilation tunnel is discussed through the mathematic model of the relationship of ventilation measure and harmful gas concentration. From this, the article evaluates the ventilation effect of Zhongshandonglu tunnel and finally gets the related conclusions about the use of natural ventilation in city tunnel.%以连续竖井的静压分布特性为基础,采用分段模型试验的方法,分4段搭建了南京市中山东路隧道模型,进行阻滞状况下的交通风压通风试验,得到了隧道的自然通风特性,以及竖井通风的一些规律.通过建立通风量与有害气体浓度之间关系的数学模型,研究评价隧道自然通风效果的方法,由此对中山东路隧道通风效果做出评价,得出竖井型城市隧道自然通风的相关结论.