特长公路隧道互补式通风模式

发布时间：2018-01-25 12:38

本文关键词： 隧道工程特长公路隧道互补式通风运营模式计算模型换气量　出处：《交通运输工程学报》2014年06期 　论文类型：期刊论文

【摘要】：建立了公路隧道互补式通风计算模型,编制了模型计算程序,研究了大别山特长公路隧道互补式通风运营模式,提出全射流纵向通风模式、单U型通风模式与双U型通风模式,分析了3种通风模式转换的控制条件与2条互补式换气横通道的功能。现场测试了运营状态下大别山隧道内污染物浓度,对比了计算结果与测试结果。分析结果表明:大别山隧道互补式通风运营模式灵活、实用,当上坡隧道交通量不超过11 500pcu·d-1时,可采用全射流纵向通风模式;当上坡隧道交通量为11 500~14 100pcu·d-1时,可采用单U型通风模式;当上坡隧道交通量为14 100~18 255pcu·d-1时,可采用双U型通风模式。离上坡隧道入口较近的换气横通道的主要作用是减小上坡隧道内的通风量,降低通风速度,离上坡隧道入口较远的换气横通道的主要作用是降低上坡隧道内的污染物浓度。采用双U型通风模式降低了离上坡隧道入口较近横通道的换气量,减小了通风系统能耗与运营费用。模型计算结果与实测结果相对误差绝对值小于10%,因此,通风计算模型精度较高,可应用于互补式通风计算。
[Abstract]:The complementary ventilation calculation model of highway tunnel is established, the calculation program of the model is worked out, the complementary ventilation operation mode of Dabie mountain super long highway tunnel is studied, and the longitudinal ventilation mode of full jet is put forward. The control conditions of three ventilation modes and the functions of two complementary cross air exchange channels are analyzed. The concentration of pollutants in the Dabie Mountain Tunnel is tested in the field. The results show that the complementary ventilation operation mode of Dabie mountain tunnel is flexible and practical, when the traffic volume of uphill tunnel is less than 11 500 PCU 路d-1. The whole jet longitudinal ventilation mode can be adopted. When the traffic volume of uphill tunnel is 11 500 ~ 14 100 PCU 路d ~ (-1), the single U type ventilation mode can be adopted. When the traffic volume of the uphill tunnel is 14 100 / 18255pcu 路d ~ (-1). The ventilation mode of double U type can be adopted. The main function of the air exchange transverse passage near the entrance of the up slope tunnel is to reduce the ventilation volume and the ventilation speed in the up slope tunnel. The main function of the cross-air exchange channel far away from the entrance of the up-slope tunnel is to reduce the concentration of pollutants in the up-slope tunnel. The energy consumption and operation cost of ventilation system are reduced. The absolute value of the relative error between the model and the measured result is less than 10. Therefore, the accuracy of the ventilation calculation model is high and can be applied to the complementary ventilation calculation.
【作者单位】：长安大学公路学院;弗吉尼亚理工大学土木与环境工程系;中交第二公路勘察设计研究院有限公司;
【基金】：交通运输部行业联合科技攻关项目(2009-353-342-560) 陕西省自然科学基金项目(2014JM7245) 中央高校基本科研业务费专项资金项目(2013G1502027,2013G3214011)
【分类号】：U453.5
【正文快照】： When the traffic volume is within 11 500-14 100pcu·d-1,single U-type ventilation mode is used0引言当前,中国公路建设发展迅速,隧道修建越来越多。当隧道长度超过5km,需风量较大时,如果采用全射流纵向通风,往往因隧道内风速太大而不能满足通风标准,在这种情况下的普遍

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