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隧道支洞与主洞相交地段处于复杂的三维受力状态,在复杂地质条件下隧道施工过程中必须尽快完成支护,尽快控制围岩变形,保证作业施工安全,使该部位的围岩处于稳定状态。本文结合雅康高速安乐隧道,介绍在软弱围岩等复杂地质条件下的隧道支洞与主洞交叉段施工技术,为类似地质条件下的隧道支洞与主洞交叉段的施工提供参考。
The intersections of the tunnel branch hole and the main tunnel are under complex three-dimensional stress. During the tunnel construction under complex geological conditions, the support must be completed as soon as possible to control the deformation of the surrounding rock as soon as possible so as to ensure the construction safety and ensure the stability of the surrounding rock in this part status. This paper introduces the construction technology of cross section of tunnel branch hole and main tunnel in complex geological conditions such as weak surrounding rock with the help of Yakang High-speed Anle Tunnel. It provides a reference for the construction of cross section of tunnel branch hole and main tunnel under similar geological conditions.