华东交通大学学报2017，Vol.34Issue(2)：20-28,9.
上方开挖卸荷作用下地铁隧道的实测数据分析
Measurement analyses on the deformation of shield tunnels due to excavation-induced unloading
摘要
Abstract
To safely excavate a pit over the existing tunnel, it is of great importance to control the deformation of the downside tunnel during the excavation construction process. Measuring analysis method is used in this paper to introduce in detail about the deformation control measures of the lying tunnel in the process of pit excavation. The measures mentioned above include mixing piles strenthening before excavation, setting anti-floating plies and setting 'star shape' support inside the tunnel. Conclusions have been drawn from the analysis of the defor-mation mechanism of the lying tunnel during pit excavation process:the cement mixing process will cause slight settlement of the tunnel; pit excavation will lead to whole-slab lifting and convergence of the tunnel itself; the cement lifting method and the anti-floating piles can effectively control the uplifting deformation during the tun-nel construction process, while the asterisk support inside the tunnel have a strong effort on minimizing the con-vergence deformation of the tunnel; the construction of mixing piles will cause 'oval shaped' of deformation of the tunnel, while the pit excavation afterwards has little influence on the deformation.关键词
基坑开挖/下卧隧道/隆起变形/收敛变形Key words
pit excavation/underling tunnel/uplift deformation/convergence deformation分类
建筑与水利引用本文复制引用
郭鹏飞,杨龙才,于正..上方开挖卸荷作用下地铁隧道的实测数据分析[J].华东交通大学学报,2017,34(2):20-28,9.基金项目
国家自然科学基金项目(51478353,41472247) （51478353,41472247）
