小导管注浆加固配合长管棚技术的应用

The application of the reinforcement method combined with small duct grouting and long pipe roof in collapse treatment of tunnel

结合清源隧道松散坍方施工实例,介绍了小导管注浆加固配合长管棚施工技术的应用,分析了管棚、小导管和初期支护相互作用机理,表明了该施工技术是治理隧道坍方的有效手段。

Combined with collapse treatment work of Qingyuan tunnel the application of the reinforcement method combined with small duct grouting and long pipe roof is introduced. The interaction mechanism of pipe roof and small duct in primary support is analyzed. Practice show this method is effective in collapse treatment.