摘要
在盾构隧道上方修建大型基坑时,如何防止基坑开挖卸荷引起隧道变位是一个工程难题.南京某基坑工程,采用旋喷桩加固地基,并在开挖中考虑软土的时空效应规律,减少了对其下方盾构隧道的影响,取得了良好的工程效果.
It＇s a poser to protect the shield tunnels from deformation, which is caused by pit excavation. A new tunnel was built as an underpass over a metro line in Nanjing. For protecting the metro shield tunnel, jet-grouted piles were used to reinforce the ground and time-space effect was considered in pit excavation. Because of taking these two measures, pit engineering had been finished successfully.
出处
《建筑技术开发》
2005年第9期36-37,40,共3页
Building Technology Development
关键词
时空效应
旋喷桩
地基加固
Time-space effect
Jet-grouted piles
Ground reinforcement
