城市综合管廊通风系统阻力计算探讨
Discussion on resistance calculation of urban comprehensiveutility tunnel ventilation systems
摘要：
通过理论分析的方法,推导出适合综合管廊通风设计人员直接使用的摩擦阻力计算式。然后根据综合管廊纵向通风的特点,结合相关资料给出适用于综合管廊通风系统的局部阻力系数取值,完善了城市综合管廊通风系统阻力计算方法。最后,对常见的400 m通风区间综合管廊实例进行了计算分析,发现许多工程实践中风机风压的选型偏大,应适当降低。该理论计算方法同样适用于其他单一舱室及其组合的情况,可为类似工程设计提供参考。
Abstract：
In this paper, through theoretical analysis methods, a frictional resistance calculation formula suitable for direct use by the ventilation designers of comprehensive utility tunnels is derived. Then, according to the characteristics of longitudinal ventilation of comprehensive utility tunnels, combined with relevant data, the value of the local resistance coefficient applicable to the ventilation system of comprehensive utility tunnels is given, which perfects the resistance calculation method of the urban comprehensive utility tunnel ventilation system. Finally, through calculation and analysis of a common 400 m ventilation section comprehensive utility tunnel example, it is found that the selection of fan wind pressure in many engineering practices is too large and should be appropriately reduced. This theoretical calculation method is also applicable to other single cabins and their combinations, and can provide a reference for similar engineering designs.
Keywords:urban comprehensive utility tunnel; ventilation; fan selection; resistance calculation; frictional resistance; local resistance