摘要
依据广州地铁6号线团一大广场~东湖站区间隧道的新河浦涌截污管道的顶管设计、施工和监测资料,采用Midas-GTS进行三维数值模拟分析,动态分析各施工工况对既有地铁隧道的影响。研究表明,随着顶管的推进,既有地铁隧道的变形会越来越大,其中顶管在垂直上方穿越地铁隧道施工时的影响最大,隧道的变形主要是由于上方土体的卸载引起,文章也对地下水位的下降可能会对既有隧道产生影响进行了讨论,旨为今后类似工程的施工提供依据和经验。
Based on the construction, design and survey of the Xinhepu Chung sewage intercepting sewer in Tuanyida Square -Donghu interval tunnel of the subway line 6, the 3D numerical simulation is conducted to analyze the effects of every construction condition on the existing tunnel dynamically by the Midas-GTS. The research shows： the deformation of existing tunnel become more bigger with the impulsion of jacking pipe; the most important effect is on the process of vertical upper cross construction of jacking pipe; the deformation of tunnel is mainly caused by the unloading of upper soil; the possible effects that the decline of groundwater table on the existing tunnel are also discussed in this paper. These provide theoretical evidences and practical experiences for the future similar engineering.
出处
《广州建筑》
2015年第5期34-39,共6页
GUANGZHOU ARCHITECTURE
关键词
顶管施工
三维数值模拟
地铁隧道
穿越施工
监测
pipe jacking construction
3D numerical simulation
subway tunnel
crossing construction
monitoring
