古田隧道大滑坡原因分析及综合治理措施

Analysis of the Cause for the Landslide at Gutian Tunnel and the Corresponding Measures Against It

介绍古田隧道在施工过程中发生的山体古滑坡复活情况,从隧道围岩地层、地质构造、滑坡特征等方面分析了其形成原因,制定了针对性的洞内加强支护、洞顶微型锚筋桩、山坡锚固桩和锚索桩综合治理措施。着重阐述了微型锚筋桩的施工工艺,为以后的同类型工程施工提供借鉴。

The landslide revival in the construction of Gutian Tunnel is introduced. The causes of such landslide are analyzed based on the surrounding rocks, geological structure and landslide characteristics. Comprehensive measures are proposed including strengthened in-tunnel support, micro-piles with anchor bars at the top of the tunnel, anchor bar piles and anchor cable piles at the mountain slope, etc. The construction technology of the micro-piles with anchor bars is emphatically explained, which may provide reference for the construction of similar works.