施工時荷重がセグメント挙動に与える影響の定量的評価方法に関する検討

抄録

Damage on segment during excavation at sharp curve due to construction loads gives heavy influence to tunnel durability. But these mechanism have not yet been made clear quantitatively. In this paper, at first, the contact force between shield tail and segment was calculated by the modified kinematic shield model with shield-segment interaction in detail. Using the measured jack force and the obtained contact force, the segment displacement was analyzed by 3D segment model with a ground reaction curve. Finally, the performance of its model was discussed, comparing the obtained segment displacement with the measured one.