重庆轨道交通6号线一期工程深埋隧道活塞通风设计分析

以重庆轨道交通6号线一期工程深埋的一段地下区间和车站为研究对象,其线路和车站埋深均在50 m以上。而目前国内地铁线路埋深多为30 m以下,多个车站连续埋深大于50 m的长区段较少见,由于其活塞风道长,阻力大,对于活塞通风效果能否满足规范要求,国内缺少类似工程可供借鉴的资料。由于工程中地面风亭设置难度大,深埋风井投资大以及长风井活塞效应减弱等因素,仅增加活塞风井并不是解决问题的最好方案,因此,设计应该在满足活塞通风效果的前提下,尽量优化通风配置,减少土建投资和规划协调的难度。对此段隧道的通风配置进行分析研究,通过模拟计算,分析活塞通风的效果,验证通风配置的合理性。

Design Analysis of Deep Buried Tunnel Piston Ventilation of Chongqing Metro Line 6 First Phase

In this paper,the research is based on one deep buried section of the first phase of Chongqing Rail transit Line 6. The tunnels and stations are more than 50 meters deep underground. Most domestic metro lines are less than 30 meters underground,and it is rare to have several stations continuously more than 50 meter underground. As the piston air duct of the project is long and ventilation resistance is big,few information of this kind of piston ventilation is available at home. It is not the best solution to add piston air duct because of the difficulty in setting up wind pavilion in planning area,the large investment and the weak effect of long air duct and piston ventilation. So the design should ensure the effectiveness of piston ventilation,optimize ventilation configuration,reduce investment and difficulty of planning and coordination. This paper analyzes ventilation configuration and effectiveness of this tunnel and verifies the rationality of the design by means of analog and calculation.