摘要
在城市复杂环境中修建地铁车站,PBA工法具有不中断交通、施工不受天气影响等优势。但由于地铁车站大多位于主干道下方,车站施工难免会扰动地层,进而引发地面变形。为了研究地铁车站PBA施工对地面的影响,以北京地铁19号线为工程背景,运用有限元软件对地铁车站PBA施工引起的地面变形进行数值模拟,并结合现场实测数据,验证有限元数值模拟的可靠性;对PBA地铁车站施工过程中地面变形特点及原因进行探究。结果表明,地面在PBA地铁车站早期施工期间变形较大,同时,越靠近车站中间部位,地面变形越大。
The PBA construction method has the advantages of not interrupting the traffic and not being affected by the weather when the subway station is built in the complex urban environment.However,as most of the subway stations are located under the main roads,the construction of the stations will inevitably disturb the ground,which will lead to ground deformation.In order to study the influence of PBA construction on the ground of subway station,with the engineering background of Beijing Metro Line 19,the ground deformation caused by PBA construction of subway station was numerically simulated by using finite element software,and the reliability was verified in combination with the field measured data.In addition,the characteristics and causes of ground deformation during the construction of PBA metro station were discussed.The results show that the ground deformation is large during the early construction of PBA subway station,and the closer to the middle of the station,the greater the ground deformation is.
作者
李力亨
LI Liheng(China Railway Fifth Survey and Design Institute Group Co. Ltd., Beijing 102600, China)
出处
《铁道建筑技术》
2020年第S01期188-191,共4页
Railway Construction Technology
基金
中铁第五勘察设计集团有限公司科研计划项目(T5Y2019-C03)
关键词
地铁车站
PBA工法
地面变形
数值模拟分析
subway station
PBA construction method
ground deformation
numerical simulation analysis
