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美国Pittatuigh and West Wiiginia 铁路132哩处之8#隧道于1959年十月七日清晨兩点因拱部崩溃54呎造成通顶坍塌事故。坍穴高70呎,直径約50呎,坍方量约四万立方吗,致中断行車十四天。这次事故,是在坍方中水份使轨道电路短路后,控制台上出现紅灯才发現的。一隧道概况該隧道全长1484呎,双线,位于向西为0.7％的上坟道上。1903年建成,当时用木衬砌,并用4吋衬板构成封闭结构,衬版后的超挖部份塞以木头,洞門和洞口衬砌用
The 8 # tunnel at 132 miles of the Pittatuigh and West Wiiginia Railroad in the United States caused a head-on collapse accident at 54 a.m. on the morning of October 7, 1959, due to the collapse of the arch. Collapse 70 feet high, about 50 feet in diameter, the collapse of about 40,000 cubic meters do, causing an interruption of driving fourteen days. The accident was caused by a red light on the console after water in the landslide shorted the track circuit. A tunnel at a glance The tunnel is 1484 feet in length and is double-spaced on an upper grave of 0.7% to the west. Built in 1903, was lined with wood, and 4-inch liner to form a closed structure, overshoot portion of the lining after the stopper plugged with wood,