海底隧道穿越风化深槽的施工方案

厦门东通道(翔安隧道)是我国第一座海底隧道,确保海水不进入隧道是工程施工的重点,也是难点,特别是安全穿越海底风化深槽,是此隧道成败的关键之一。文章结合以往施工经验和海底隧道的工程地质特性,从超前地质预报、应急预案、全断面帷幕注浆、超前支护、开挖工法等方面着重阐述钻爆法穿越风化深槽的施工方案与施工注意事项。

Construction scheme of crossing the deep weathering slot about seabed tunnel

Xiamen east channels is the first seabed tunnel in our country, insuring the seawater out of the tunnel is the keystone and the difficulty of construction, especially crossing the deep weathering slot safely is one of the key of success or failure of the tunnel's construction.Combined former construction experiences and the geological characteristic of seabed tunnel, this paper expatiated the construction scheme and precautions of crossing the deep weathering slot using the way of boring and bursting from the leading geology forecast, lash-up scheme, infusing thick liquid with purdah of the whole section, the leading pre-supporting and the digging way.