perimeter grouting

In the construction of Xiamen Xiang\'an tunnel,peripheral curtain grouting,advance long pipe-roofing and tri-bench excavation method have been taken based on the geological condition of deep F3 weathered trough passed by Xiang\'an tunnel.

针对厦门翔安隧道海域段F3风化深槽的地质特点,文章主要论述了采用周边帷幕注浆、超前长管棚进行预支护,以及采用三台阶法进行开挖的施工技术。