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发明公开
CN104790978A 小净距立体交叉隧道环形导坑施工方法 有权 转让

小净距立体交叉隧道环形导坑施工方法
摘要：
本发明创造涉及一种小净距立体交叉隧道环形导坑施工方法，通过超前地质预报、测量放线、拱部超前支护、上部环形导坑开挖、上部环形导坑初期支护、中下部环形导坑开挖、中下部环形导坑初期支护、核心土开挖、底部及仰拱开挖、仰拱超前支护、底部及仰拱初期支护、注浆和监控量测进行施工，有效的强化了隧道围岩的受力能力，保证了立体交叉影响区段的安全跨越。
摘要（英）：

The invention relates to a small-clear-distance grade separation tunnel annular guide pit construction method. Construction is conducted through advance geology forecasting, surveying and setting out, arch advance supporting, upper annular guide pit excavating, upper annular guide pit preliminary supporting, lower middle annular guide pit excavating, lower middle annular guide pit preliminary supporting, core soil excavating, bottom and inverted arch excavating, inverted arch advance supporting, bottom and inverted arch preliminary supporting, grouting and monitoring and measuring, the force bearing capacity of tunnel surrounding rock is effectively enhanced, and it is guaranteed that grade separation does not affect safe crossing of zones.

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