An investigation into the behaviour of jointed tunnel lining

摘要

The design of the precast segmental lining is based upon the proposed tunnel alignment and the expected geological condition at the tunnel level. The geometrical arrangement of the segment type might vary along the tunnel route, depending on the tunnel boring machine steering alignment. This, in turn, affects the orientation of joints within each segmental ring. Furthermore, the possible mode of joint orientation is governed by the joint number. The combination of these two factors might influence the stresses induced in the tunnel lining. Subsequently, both the cost and planning purposes might be affected.