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An Estimation of Causes that Lining Concrete of the Tunnel Collapsed and Inspection with Respect to Problems of Cold Joint

机译:关于冷缝问题的隧道衬砌混凝土坍塌原因的评估与检查

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摘要

It is thought that a concrete structure can generally be made available maintenance-free semipermanently. However, deterioration of the concrete by the alkali aggregate reaction, salt damage, frost damage has actualized in recent years. Furthermore, there happened an accident that the lining concrete block (length: 2m, weight: 200 kg) of tunnel hit the Shinkansen super express at Fukuoka-tunnel of the Sanyo Shinkansen Line in June 1999. As a result, the safety of concrete structures will be regarded as a doubt.
机译:据认为,通常可以半永久免维护地获得混凝土结构。但是,近年来,由于碱集料反应引起的混凝土劣化,盐分损伤,霜冻损伤已经实现。此外,1999年6月,发生了隧道衬砌混凝土块(长度:2m,重量:200 kg)撞上三洋新干线的福冈隧道的新干线特快列车的事故。因此,混凝土结构的安全性将被视为一个疑问。

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