摘要
为了研究繁华城区大断面顶管隧道施工过程中掌子面的支护压力及稳定性规律,本文采用有限元数值模拟,计算分析了不同地层下隧道掌子面变形发展规律,对比分析了两种工况下极限支护压力比λ,同时计算分析了隧道埋深和土体强度因素对极限支护压力的影响规律。研究成果能够为工程施工中掌子面稳定压力的确定提供数据支持。
In order to study the laws of supporting pressure and stability of tunnel face during the construction of large section pipe jacking tunnel in prosperous urban area, the development of deforma- tion of tunnel face with different stratums was calculated by adopting the FEM numerical simulation. The ultimate support pressure ratio under two conditions was analyzed. In addition, the effects of buried depth and soil strength on ultimate supporting pressure were studied. The conclusion can be used to de- termine the steady pressure of tunnel face during engineering construction.
出处
《低温建筑技术》
2017年第5期82-84,89,共4页
Low Temperature Architecture Technology
关键词
矩形顶管隧道
极限支护压力
稳定性分析
rectangular pipe jacking tunnel
ultimate supporting pressure
stability analysis
