ABSTRACT
One of the possible countermeasures to prevent the heaving of a mountain tunnel in service is the construction of a new inverted arch structure, however the construction activity during the service stage of tunnel has problems in terms of workability and economic efficiency of construction. In this study, we focused on the geometries of an invert arch structure, and through small model test and numerical analysis, we aimed to propose a rational inverted arch structure that contributes to reducing construction time and cost. Some structures were confirmed to exert an effect of reducing construction time as well as maintaining a certain degree of load-bearing capacity.
