Through the theoretical research, field monitoring and laboratory test, this paper understands the characteristics of large deformation of the tunnel, explores the mechanism of large deformation and puts forward the main control measures to provide references for the safety construction of other tunnels with large deformation.%本文通过理论研究、现场监测及室内试验，了解了该隧道大变形特征，探究了大变形发生的机理，提出了主要控制措施，为其它大变形隧道安全施工提供借鉴。
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