摘要
南京地铁某标段区间隧道工程采用了11m级大直径泥水气压平衡盾构施工,介绍了该泥水气压平衡式盾构在含砾中粗砂层和粉细砂地层中开挖面失稳的两种现象及处理技术。对于开挖面失稳的现象和原因进行了分析,确定了失稳后舱内坍塌造成泥水管路堵塞的处理方法以及如何重新建立泥水平衡,总结了防止失稳的掘进技术措施,最终顺利完成盾构掘进。
A 11 m diameter slurry shield was used in the excavation of a river tunnel of Nanjing Metro.Two phenomenon of tunnel face failure of this machine in gravels and fine sand ground and correspondent treatment measures are introduced.The failure phenomenon and mechanism of tunnel face are discussed.The treatment measures of slurry pipe blockage due to the collapse in the chamber when the face failed,as well as the reestablishment approach of slurry balance are determined.And excavation technical measures to prevent the failure of tunnel face are summarized.The excavation of the tunnel was successfully finished.
出处
《施工技术》
CAS
北大核心
2016年第13期97-100,共4页
Construction Technology
关键词
地铁
盾构
泥水气压平衡盾构
开挖面
失稳
施工技术
subways
shields
slurry pressure balanced shield
excavation surface
instability
construction
