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本文分析了谷山隧道软弱围岩偏压地层段施工后初期支护下沉变形严重的原因,介绍了整治方案及施工要点;并提出了在软弱围岩地段预防下沉的技术措施。
This paper analyzes the reasons for the serious deformation of the initial supporting subsidence after the construction of the weak surrounding rock in the Gu Shan tunnel, introduces the remediation plan and construction essentials, and puts forward the technical measures to prevent sinking in the weak surrounding rock.