摘要
选择西安地铁二号线草场坡—小寨区间三连拱隧道,借助有限元软件Ansys11.0模拟其施工过程,同时结合现场监测数据,对黄土地铁三连拱隧道中隔墙的受力变化及分布进行研究.分析结果表明:中隔墙受力大小变化突出的阶段主要集中在侧洞开挖到侧洞二衬施工之间;受力分布变化主要集中在侧洞上台阶开挖,侧洞仰拱二衬施工,中洞开挖和中洞二衬施工四个阶段.施工过程中,中隔墙的受力变化相对稳定,受力也控制在相对安全的范围内,认为双洞法+台阶法施工可以在黄土地铁连拱隧道的施工中推广使用.
In order to understand the stress condition of midboard during the construction of subway three-arch tunnel which is constructed by double-cave method plus bench method,based on the Second Subway Line of Xi＇an,with the help of large numerical simulation program and field monitoring data,researchers have studied the stress change and distribution of midboard.It is shown that： the prominent phase of stress numerical changes in midboard is concentrate during side-cave excavation and side-cave secondary lining construction,the prominent phase of stress distribution is concentrate in four phase as follows： side-cave upper bench excavation,side-cave invert secondary lining construction,middle-cave excavation and middle-cave secondary lining construction.In a word,the double-cave method plus bench method is suitable in subway multi-arch tunnel,which deserves to be popularized in loess area.
出处
《郑州大学学报（工学版）》
CAS
北大核心
2011年第2期66-70,共5页
Journal of Zhengzhou University（Engineering Science）
基金
西安市地铁办资助项目(D2-YJ-022008204)
关键词
隧道工程
黄土地铁
三连拱隧道
数值模拟
现场监测
受力体系转换
tunnel engineering
loess subway
three-arch tunnel
numerical simulation
field monitoring
stress transformation.
