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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杨正明,林国清,黄志强.松散土体隧道施工及格栅管棚的应用[J].钻探工程,1994,(2):8-10.Yang Zhengming, Lin Guoqing. Tunnel Excavation in Unconsolidated Soil Body and Application of Grid Pipe Shield[J]. Drilling Engineering, 1994,(2):8-10.