| This study focuses on the joints of shield tunnel segmental lining to understand the
mechanisms of tunnel deformation and the effects of changes in joint characteristics on the behavior
of the tunnel. A model experiment was carried out assuming that the tunnels are subjected to exter-
nal forces from the ground that cause large horizontal compressive deformations. The common
bolted type was used for segmental joints and two types of ring joints were used: bolted and fitted.
As a result, the developmental stages of deformation and collapse of segments and joints were identi-
fied when subjected to deformation beyond the loading conditions assumed in the normal design.
The continuous ring restraint as a fitting type of ring joint prevents the collapse of the segment lining
due to the yield of the joint in the event of a major deformation of the tunnel. |
