<b>Numerical Analysis Method for Corrosion of Segment Joints in Shield Tunnels Caused by Chloride Attack</b>

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  • KINOSHITA Kaho
    Tunnel Engineering Laboratory, Structures Technology Division
  • USHIDA Takashi
    Foundation & Geotechnical Engineering Laboratory, Structures Technology Division

Abstract

<p>Deterioration caused by chloride ions may occur in some shield tunnels located in waterfront areas or near tidal rivers. In this paper, we propose a three-dimensional finite element analysis method for the maintenance of shield tunnels affected by chloride ions. In proposing this method, we developed a modeling method for deteriorated segment joints by reducing stiffness. In addition, we verified the validity of the method by loading tests of segmental lining specimens.</p>

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