大窝山隧道超前注浆小导管施工技术

Construction technology of the pre-grouting small pipe in Dawoshan tunnel

为确保隧道施工安全,避免开挖过程中出现塌方现象,对采用超前注浆小导管对前方围岩进行预支护的施工技术进行了详细介绍,为类似情况的隧道超前小导管施工提供一定的借鉴。

For ensuring the construction safety of the tunnd and avoiding the collapse in the excavation process, the author detailedly introduces the pre-supporting construction technology of the frontage surrounding rock by using the pre-grouting small pipe, which provides the reference for the tunnel lead small pipe construction under the similar situation.