浅埋输水隧洞洞口段施工技术

Construction technique for opening section of shallow buried water conveyance tunnel

浅埋、围岩风化严重、泥石流堆积体、老黄土层等复杂地质条件下的输水隧洞洞口施工经常会出现坍塌、洞脸滑坡、洞口段冒顶等工程质量及安全事故。结合几条浅埋隧洞洞口的洞脸、锁口、洞口地质复杂段的临时支护等施工方法,研究在浅埋、偏压、地质条件复杂的洞口合理、有效的施工措施。

During the construction of the tunnel, the means used in tunneling is different from that of geological condition. The construction quality and safety misadventure in terms of cave - in, landslide and roof fall etc. take place frequently at tunnel opening under construction. This paper introduces the construction technique for opening section of shallow buried water conveyance tunnel under several typical geologic conditions, which can provide the reference for other similar projects.