在隧道工程施工中,由于斜井内轮廓尺寸小于主洞内轮廓尺寸,从斜井进入主洞时,交叉口处施工难度较大且存在极高的安全隐患。本文以十天高速公路甘肃段ST22合同段关同隧道通风斜井与主洞交叉口的施工为依托,对从斜井进入主洞的交叉口处的支护方式、施工顺序、施工方法进行了详细探讨,以期为同类工程施工提供参考。 In the tunnel construction, due to the profile size of the inclined shaft is smaller than that of the main hole, it is more difficult to construct at the intersection when it enters the main tunnel from the inclined shaft and there is a very high potential safety hazard. Based on the construction of the intersection of ST22 contract section of Gansu section of 10-day expressway and the intersection of ventilation shaft and main tunnel of ventilation tunnel, the support methods, construction sequence and construction method of the intersection from inclined shaft to main tunnel were studied Detailed discussion, with a view to providing reference for the construction of similar projects.