Abstract: It is very usual to observe the water leakages at the deformation joints and side walls during the tunnel operations after the construction. This paper presents a case history of a tunnel liner leakage mitigation details. The factors that causing the liner leakage are presented from both the statistically investigation and the qualitative analyses. The different mitigation methods for the different leakages, such as, water marks at the concrete surface, leakage at the liner through the groundwater rich areas and the seepage at the construction and deformation joints, are proposed in the paper. 

Key words: Tunnels, Groundwater Leakage, Deformation Joints, Tunnel Construction