ABSTRACT
The Tokyo Metropolitan Government has a plan to construct the Kanda River / Loop 7 Underground Regulation Pond Work (2nd phase). The pond will be constructed by the shield tunneling method and will occasionally be under internal water pressure after completion of the tunnel. We mainly focused on the subgrade spring and tensile rigidity of segment joint on an analysis model (Beam-spring model). As a result, we could propose a reasonable and economical design method for shield tunnel lining under internal water pressure.
