If the tunnel serious seepage Water Leakage, lining crack, it will greatly reduce the safety and reliability of the structure, and then influence the normal operation of tunnel, thus the whole traffic line is completely interrupt status, cause serious economic loss and bad influence to the highway traffic. So to guarantee the operation of the tunnel durability and in the process of driving safety, inspection, to the existence of hidden dangers of disease or disease tunnel maintenance work has become urgent work.
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