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一、问题的提出。在双线隧道施工中,采用全断面开挖无轨运输时,消除洞内和工作面炮烟和汽车尾气的严重污染,其首要问题是如何保证供给工作面足够的新风:配备适当的风机,采用大直径风管(φ>1200)是搞好施工通风的有力措施。然而往往由于施工现场管理工作跟不上,风管延伸铺设不能及时,或因其它某种原因,不能达到设计要求位置,以致造
First, the question raised. In the construction of double-track tunnels, when using full-section excavation trackless transportation, eliminating the serious pollution of the smoke inside the caverns and working face and the exhaust gas of the vehicle, the primary problem is how to ensure sufficient fresh air supply to the working face: equipped with appropriate fan, Large diameter duct (φ> 1200) is a powerful measure to improve the ventilation of construction. However, often due to construction site management can not keep up, the wind can not extend the laying of the extension, or for some other reason, can not meet the design requirements of the location, so that