高应力软弱围岩的支护方式的分析及其应用

明垭子隧道是十堰至天水高速公路的控制性工程之一,在隧道穿越高地应力软弱围岩时,初期支护结构发生了严重变形。通过现场监控量测的方法对明垭子隧道采用的套拱法和双拱法两种支护形式的变形情况进行了分析,结果表明穿越高地应力软弱围岩地层采用双拱支护结构形式可有效地控制隧道的变形,为类似工程提供借鉴。

The Analysis and Application of the High Stress in Weak Rock Support Form

Mingyazi tunnel is one of the controlling engineerings of Shiyan to Tianshui highway.There was a serious distortion in the primary support structure while the tunnel undercrossing the high ground stress in weak rock.After site monitoring,we had an analysis of the deformation of the Mingyazi Tunnel in the method of set of arch method and dual arch.The result shows that it can effectively control the tunnel deformation to adopt the double arch support structure while undercrossing the high ground stress in weak rock strata.