公路隧道考虑多车型的CO海拔高度系数研究  

On Altitude Coefficient Considering CO from Various Kinds of Vehicles in Highway Tunnels

作　　者：严涛[1,2] 王明年[1] 郭春[1] 殷杰[1] 谢文强[1] 

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,土木工程学院,成都610031 [2]西南交通大学峨眉校区土木系,峨眉614202

出　　处：《现代隧道技术》2015年第3期8-13,54,共7页Modern Tunnelling Technology

基　　金：国家973计划课题(2010CB732105);国家自然科学基金项目(51108384);中央高校基本科研业务费专项资金(SWJTU10101B10096020,SWJTU11BR013)

摘　　要：现行公路隧道通风设计中考虑CO的海拔高度系数取值主要是针对低海拔隧道,而海拔超过2 200 m的取值均按照线性延伸处理。随着汽车技术水平的不断进步以及西部高海拔公路隧道的不断涌现,考虑CO的海拔高度系数规范取值正确与否值得商榷。文章通过对汽油车各车型CO排放量的现场实测,推导了一种考虑多车型的CO海拔高度系数的计算公式,提供了一种较为准确地计算隧道需风量的可行方法。依托某隧道工程实例,分别采用规范中考虑CO的海拔高度系数值以及考虑多车型CO海拔高度系数修正值来计算该隧道需风量及风机功率。通过对比分析,采用考虑多车型CO海拔高度系数修正值计算的风机功率将显著降低。As for the current ventilation design of highway tunnels, the value of the altitude coefficient is mainly determined by considering CO emissions in tunnels at low attitudes, while a relevant linear extension is adopted to determine the altitude coefficient for tunnels with altitudes above 2 200 m. With the development of automotive technology and an increase of high-altitude highway tunnels in western China, it is necessary to further study the value determination of altitude coefficients considering CO. In this paper, a calculation formula is deduced for altitude coefficients considering CO from various kinds of gasoline vehicles based on field measurements; this formula provides a relatively accurate way to calculate the required air volume for tunnel ventilation. Using a case study as an example, required air volumes and fan powers are calculated using the code-specified altitude coefficient and the modified altitude coefficient considering CO emissions from various kinds of vehicles, with the results showing that the calculated fan power is significantly reduced using the modified coefficient.

关 键 词：高海拔公路隧道 考虑多车型CO海拔高度系数值 现场测试 公式推导 计算实例 

分 类 号：U453.5[建筑科学—桥梁与隧道工程] U452.1[交通运输工程—道路与铁道工程]