The reinforce concrete segment used in shield tunnel has some inherent shortcomings.
盾构法施工中长期采用的钢筋混凝土管片存在一些固有缺点。
But the large-diameter concrete segment in the production sometimes happens more bubble, thus it is easy to form leakage channels, which affects the durability.
但大直径混凝土管片在生产中易出现较多气泡，从而易形成渗漏通道，影响管片的耐久性。
But the large-diameter concrete segment in the production sometimes happens more bubble, thus it is easy to form leakage channels, which affects the durability.
但大直径混凝土管片在生产中易出现较多气泡，从而易形成渗漏通道，影响管片的耐久性。
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