2022 Volume 78 Issue 2 Pages I_1-I_15
Plain concrete with a design thickness of 30 cm and uniaxial compressive strength of 18 N/mm2 is the standard lining for general sections of road tunnels of normal cross section constructed by the mountain tunneling method. However, the function and performance of the lining and its evaluation method are not fully established, which is an issue when introducing new technologies to the lining. This paper proposes an evaluation flow in terms of the load-bearing capacity of the lining, which consists of an evaluation method using the cross-sectional load-bearing capacity and an evaluation method using the load-bearing capacity of the entire structure. The applicability of the proposed flow was confirmed by evaluating the load-bearing capacity of a thin-walled high-strength lining as an example of a new lining technology. It was found that the use of the evaluation method based on the load-bearing capacity of the entire structure enables the evaluation of the load-bearing capacity of the lining in a more rational manner, taking into account the gradual destruction of the lining and the failure mode of the lining when it becomes unstable.
