排风口布置对地下环路半横向通风影响研究  

Study on the Influence of Exhaust Outlet Layout on the Semi Transverse Ventilation of Underground Loop Road

作　　者：虞宙 李积广 梁印 YU Zhou;LI Jiguang;LIANG Yin(JSTI Group Co.,Ltd.,Nanjing 210019,China;Xinhe Real Estate Co.,Ltd.,of CSCEC,Changsha 410000,China)

机构地区：[1]苏交科集团股份有限公司,南京210019 [2]中建信和地产有限公司,长沙410000

出　　处：《现代交通技术》2022年第3期60-64,共5页Modern Transportation Technology

基　　金：住房和城乡建设部研究开发项目(2018-K4-020);江苏省住房和城乡建设厅科技项目(2017ZD135,2018ZD140117)。

摘　　要：为分析排风口布置对地下环路带匝道段通风效果的影响,采用FLUENT数值模拟软件模拟分析开启不同位置的排风口时地下环路内速度场及CO浓度场分布规律。研究结果表明:匝道前方的污染物可通过匝道排出,而匝道与主环路交叉口后方易形成小范围的污染物积聚区,须着重考虑该区域污染物浓度是否超标。同时在耗能相同的情况下,可通过开启匝道后方排风口对匝道后方路段进行通风,从而改善通风效果并降低环路内污染物浓度。In order to analyze the influence of exhaust outlet layout on the ventilation effect of underground loop with ramp section,the project uses fluent numerical simulation software to simulate and analyze the distribution law of velocity field and CO concentration field in underground loop when different exhaust outlets are opened.The results show that the pollutants in front of the ramp can be discharged through the ramp,and a small range of pollutant accumulation area is easy to form after the intersection of the ramp and the main ring road.At this time,it is necessary to consider whether the pollutant concentration in the area exceeds the standard.In the case of the same energy consumption,the loop section behind the ramp can be ventilated by opening the exhaust port behind the ramp to improve the ventilation effect and reduce the concentration of pollutants in the loop.

关 键 词：地下环路 排风口 数值模拟 通风效果 

分 类 号：U453.[建筑科学—桥梁与隧道工程]