浅议小断面隧洞施工的通风技术

Discussion on Ventilation Technology in Light Section Tunnel Construction

马家岩水库输水隧洞断面较小,施工采用从进出口两头掘进法,整体施工难度较大,通风技术是其工作难点。通过选择通风方法,计算风量、风阻、通风机供风量、通风机全压等参数,结合实际情况,选择合适轴流通风机型号,并进行设备合理布置,做好了通风工作,也为顺利施工创造了条件。本文对此加以介绍。

Because of the small cross-section of Majiayan reservoir water transportation tunnel, the construction adopts the excavation method which drivage from both the entrance and exit. The whole construction is difficult; ventilation technology is the key difficulty for the construction. Proper axial flow fan is chosen and the equipments are reasonably arranged in the light of the actual situation after choosing ventilation as well as calculating parameters such as wind volume, wind resistance, air supply volume of ventilator, ventilator total pressure, and so on. Good ventilation can be beneficial for the smooth construction.