基于实测数据的西汉高速公路秦岭隧道通风效果评估
2016-03-22官海兵
官海兵
摘要:为了保证西汉高速秦岭Ⅰ、Ⅱ号隧道运营期间的行车安全,观测了该区段隧道断面的实际交通量,并与预测交通量进行对比分析;利用CO浓度检测器和能见度检测器对隧道上行线内污染物进行实测,并分析讨论了实测数据。结果表明:实际交通量达到预测交通量的88%;隧道内实测最大CO浓度与规范中设计值相比差距较大,实测最大烟雾浓度接近或超过规范中烟雾浓度设计值。因此,需要对秦岭Ⅰ、Ⅱ号隧道送排通风系统工程进行改造,以满足目前隧道内通风要求,同时忽略CO浓度的影响,将烟雾浓度作为主要考虑因素。
关键词:隧道工程;通风效果;交通量;污染物
中图分类号:U453.5文献标志码:B
Abstract: In order to assure the safety for the operation period of Qinling tunnel I and II of XianHanzhong expressway, the traffic of those two tunnels were measured and analyzed. By using the CO concentration detector and sight inspector, the pollutants in the upstream line of Qinling tunnels were measured. Analysis of the measured data shows that the average value of measured traffic reaches 88% of the maximum value of predicted traffic; the measured maximum value of CO concentration in Qinling tunnel I and II are much lower than the designed value; the measured maximum value of smoke concentration are around or higher than the designed value. Therefore, the ventilation system used in Qinling tunnels needs to be improved to meet the requirement of ventilation at present. During the improvement, the effect of CO concentration can be ignored, while the influence of the smoke concentration needs be considered as a major factor.
Key words: tunnel engineering; measured data; ventilation effect; evaluation
0引言
户县经洋县至勉县高速公路(简称西汉高速)是国家“7918”高速公路网北京至昆明线(G5)在陕西境内重要的一段,是沟通华北和西南的公路运输大通道,也是陕西省“2367”高速公路网的重要组成路段。该工程自2002年8月开工,至2007年9月全线贯通,建设工期为5年。由于其在国家高速公路网中的重要作用和建设条件的特殊性,在当时受到了交通部、陕西省委、省政府的高度重视,被列为全国公路建设的标志性工程。其中秦岭Ⅰ、Ⅱ号隧道作为西汉高速重要控制性工程之一,在汶川地震救援和物资运送等重大事件中发挥了重要作用。
许多学者对秦岭Ⅰ、Ⅱ号隧道做了大量的研究工作。2005年,杨彦民、曹振等人经过分析、计算,对隧道群运营通风系统在不同工况下风机的运行进行优化配置,细化了防火与救灾模式等内容,最终确定了秦岭Ⅰ、Ⅱ号隧道的通风设计[1]。……
