研究方法：结合西安南京铁路桃花铺1号隧道的工程实践，研究预防TBM施工事故的措施和施工方法。
Research methods:This paper researched the preventive measures and construction methods on TBM construction accidents in terms of Taohuapu No. 1 tunnel construction practice of Xi'an-Nanjing Railway.
针对阳宗海一号隧道出口段的地层特点，介绍了在松散土体地层中遂道施工方法的选择及在施工中出现坍塌的处理方法。
Methods of tunnel excavation in unconsolidated formations and the collapse zone treatment are intro-duced according to the formation properties fo exit section of Yangzong No.
针对阳宗海一号隧道出口段的地层特点，介绍了在松散土体地层中遂道施工方法的选择及在施工中出现坍塌的处理方法。
Methods of tunnel excavation in unconsolidated formations and the collapse zone treatment are intro-duced according to the formation properties fo exit section of Yangzong No. 1 Tunnel.
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