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The current understanding is that aged deterioration poses a serious problem in the most of all communication cable tunnels that take an important role in information-oriented society.However, it remains to be elucidated how to evaluate soundness of tunnel appropriately in the limited funds and time.To establish the evaluation method, here we study structural performance of the tunnel itself and whether tunnel which a crack and corrosion generated can bear the purpose of use.Seven experiments with a 1/2 scale models and numerical analyses were conducted, and the validity of an analysis model and the effect of the reinforcement construction method were investigated.The results of the study show the indicator of the maintenance management technique over the communication cable tunnels of various states.