铁道科学与工程学报2018，Vol.15Issue(3)：718-726,9.
大型深基坑开挖对旁边地铁盾构隧道影响的实测分析
Monitoring data analysis on the influence of large deep foundation pit excavation on nearby metro shield tunnel
摘要
Abstract
The large deep foundation pit adjacent to the Hangzhou Metro Line 2, pit-in-pit excavation and the binding beam connecting underground diaphragm wall and a row of the same depth of isolation pile are used as special reinforcement measures. Horizontal displacement, vertical displacement and horizontal convergence of the tunnel caused by excavation are monitored. Rules of the influence of large deep excavation on the nearby tunnel and effect of reinforcement measures are analyzed. Empirical formulas of horizontal displacement of the tunnel is proposed. The results show that the horizontal deformation of normal distribution in tunnel increases obviously and transverse diameter of tunnel increases obviously that leads to the tunnel shows a shape of the horizontal ellipse. The horizontal displacement and convergence of the tunnel satisfies the codes and settlement satisfies the alarm value which is settled. The reinforcement measures of the project are applied to large deep foundation pit. "Step excavation, cut-and-support, step concrete placing" should be taken as excavation methods and width which is exposed of foundation pie adjacent to tunnel caused by excavation can be decreased.关键词
深基坑开挖/地铁隧道/水平变形/沉降Key words
deep foundation pit excavation/metro tunnel/horizontal deformation/settlement分类
建筑与水利引用本文复制引用
魏纲,厉京,宣海力,董力政,徐咏咏,张世民..大型深基坑开挖对旁边地铁盾构隧道影响的实测分析[J].铁道科学与工程学报,2018,15(3):718-726,9.基金项目
国家自然科学基金资助项目(51778576) （51778576）
杭州市科委资助项目(20160533B95) （20160533B95）
