长大管棚超前预加固技术在隧道施工中的应用

Application of long pipe shed pre-enhancement technique in tunnel construction

针对背阴坡隧道下穿高速公路段埋深小、围岩软弱破碎、偏压明显等复杂不良地质条件,采用长大管棚超前预加固的施工方法,取得了良好的效果,主要介绍背阴坡隧道下穿高速公路段长大管棚施工的工艺流程及技术要点,为类似工程施工提供参考。

Aimed at the complex adverse geological conditions including shallow overburden layer, weak-broken rocks and eccentric pressure, etc. , the long pipe shed pre-enhancement technique is applied with satisfactory results. The technological process and technic points of the long pipe shed construction procedure are introduced to provide reference for those tunnel engineerings in similar conditions.