摘要
文章结合渝利铁路长洪岭隧道工程实例,在无法采用巷道式通风方式的情况下,采用了分隔巷道与风管压入式联合通风模式。从通风系统布置、斜井供风巷道的分隔与密封、风仓的设置与密封等几个关键技术入手,介绍了适合长大隧道斜井工区的长距离独头通风技术。经现场试验测试和成功推广应用表明:该联合通风模式延长了长大隧道斜井工区施工通风距离,较好地解决了通风技术难题;三阶段动态设计通风方案适用不同施工时期通风需要;第三阶段通风时,风仓设置横隔板、进风口远端布置风机为发挥风机效率的最佳方式;风管的顺直度、完好性对通风效果的影响极大,将风管的百米漏风率控制在2%以下,风量将得到更好的保证。
Using the construction of the Changhongling tunnel on the Chongqing-Lichuan railway as an example, this paper proposes a forced ventilation scheme combining separated duct and vent pipe in the ease where duct ventilation can not be used. Additionally, it introduces one-end ventilation for the long inclined shaft of a tunnel with a large section regarding the ventilation system arrangement, separation and sealing of the air supply duct and the setting and sealing of the air chamber. The results show that： adopting such a three-phase ventilation scheme can not only lengthen the ventilation distance of the inclined shaft, but also satisfy the different ventila- tion requirements of different construction periods; setting the diaphragm in the air chamber and the fan at the far end of the air intake makes best use of fan efficiency in phase-3 ventilation; the straightness and integrity of the vent pipe have great impacts on the ventilation effect, for which the air volume can be guaranteed with an air leakage rate per 100 m of under 2%.
出处
《现代隧道技术》
EI
CSCD
北大核心
2015年第6期184-189,共6页
Modern Tunnelling Technology
基金
中铁隧道集团科技创新项目(隧研合2013-01)
关键词
长大隧道
施工通风
斜井
分隔
风仓
Long tunnel with a large section
Construction ventilation
Inclined shaft
Separation
Air chamber
