特长公路隧道单斜井双正洞通风新技术  

Ventilation Technology of Single Inclined Shaft and Double Positive Tunnel in Extra-Long Highway Tunnel

作　　者：侯江 刘建海 Hou Jiang;Liu Jianhai(Yunnan Railway Group Co.,Ltd,Kunming 650118,Yunnan,China)

机构地区：[1]云南省铁路集团有限公司,云南昆明650118

出　　处：《绿色科技》2025年第2期228-233,246,共7页Journal of Green Science and Technology

摘　　要：以永德-耿马高速公路帮福隧道为研究对象,旨在制定合理通风方案。分析了隧道施工过程中可能存在大量的有害气体和粉尘等有害因素,初选单斜井双正洞通风方案,结合洞内最多工作人员数量、允许最低风速、排除爆破炮烟、同时工作的最多内燃设备以及高山地区等条件,理论计算出单斜井与二正洞施工中的最大需风量和通风总阻力,通过对不同风机的性能参数及特性曲线的分析对比,选出最优风机型号。确定了采用压入式供风和射流式供风相结合的方式,最终选定使用4台SDF(C)NO12.5轴流压入式风机、8台SDS112F-4P-37射流风机进行巷道式供风。这对降低炮烟污染,改善施工作业环境、保障作业人员职业健康具有明显效果,还有效地减少隧道施工的投入,保证了良好的通风效果。该方法不仅满足特长公路隧道安全施工的通风需求,还节约了施工通风成本,较好地解决了特长公路隧道的施工通风问题,可供类似工程参考。Taking the Bangfu Tunnel of Yongde-Gengma Expressway as the research object,the aim is to formulate a reasonable ventilation scheme.The possible existence of a large number of harmful gases and dust and other harmful factors in the tunnel construction process is analyzed.The ventilation scheme of a single inclined shaft and two main tunnels is initially selected.Combined with the maximum number of staff in the tunnel,the allowable minimum wind speed,the removal of blasting smoke,the maximum number of internal combustion equipment working simultaneously,and high-altitude areas and other conditions,the maximum air demand and total ventilation resistance in the construction of the single inclined shaft and the two main tunnels are theoretically calculated.Through the analysis and comparison of the performance parameters and characteristic curves of different fans,the optimal fan model was selected.It is determined to adopt the combination of pressure supply and jet supply,and finally it is determined to use 4 SDF(C)NO12.5 axial flow pressure supply fans and 8 SDS112F-4P-37 jet fans for roadway supply.This has obvious effects on reducing smoke pollution,improving the construction working environment,and ensuring the occupational health of workers,and also effectively reduces the investment in tunnel construction,ensuring a good ventilation effect.This method not only meets the ventilation requirements for the safe construction of long tunnels,but also saves the cost of construction ventilation.The problem of construction ventilation in long highway tunnels is better solved,which can be used for reference in similar projects.

关 键 词：特长公路隧道 单斜井双正洞 压入式供风 射流式供风 

分 类 号：U455[建筑科学—桥梁与隧道工程]