PAPERS |
Takashi ARUGA, Yasushi ARAI, Kiwamu TSUNO
As a number of mountain tunnel linings without reinforcing bars are deformed and cracked by earth pressure, evaluation methods of their strength have been researched and established to design countermeasures. On the other hand, there have been no well-established evaluation methods for the structural strength of urban tunnels with reinforcing bars, which are safer against earth pressure. Then, model tests and numerical calculation concerning the tunnels with reinforcing bars have been carried out to investigate the mechanical properties of them. It has been confirmed that the tunnels become stable by distributing stress even for case of stiffness reduction and their strength can be grasped by using the numerical calculation method described in this paper.
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