摘要
上海长江隧道无论直径还是一次连续掘进距离迄今均居世界之首,隧道由东、西两线组成。为满足逃生需要,两线间共设8条联络通道。联络通道的施工将在已经施工完成的隧道中进行。后续隧道和联络通道的开挖应在周围土体和管片的变形、应力状态基本稳定的前提下实施。对先期隧道和后续隧道开挖过程进行三维弹塑性渗流应力耦合分析,从土体位移,管片变形及其主应力、剪应力变化的角度,确定了后续隧道和联络通道的最早施工时期,为本工程的施工提供有益参考。
Shanghai Yangtze Tunnel is by far the shield tunnel with the largest diameter and longest once-driving distance in the world,which is composed of two（east and west） lines.In order to satisfy the required escape at critical moment,a total of eight parallel cross passages will be built between these two tunnels,and the construction of cross passages should be completed in the two excavated tunnels.Usually,the subsequent tunnel and cross passages should be excavated after that the deformation and stress state of surrounding soils and segments have been basically stable. The construction process of Shanghai Yangtze Tunnel prior and subsequent tunnels is numerically simulated with a 3D elastoplastic coupled anisotropic seepage and stress model. Based on the variations of soil displacement, segments ‘ deformation, segments ＇ principal and shear stresses, the earliest construction periods of subsequent tunnel and cross passages are obtained, which may provide beneficial reference for this project.
出处
《地下空间与工程学报》
CSCD
北大核心
2009年第5期985-990,共6页
Chinese Journal of Underground Space and Engineering
基金
国家高技术研究发展专项(863计划)资助项目(2006AA11Z118)
关键词
大直径
平行隧道
联络通道
施工时期
渗流应力耦合
large diameter
parallel tunnel
cross passage
excavation period
coupled seepage and stress
