摘要
为研究隧道掘进机(TBM)从施作好的地铁车站中板上整体步进过站的技术,依托重庆地铁6号线工程,设计"弧底导轨"TBM中板步进过站方案和车站中板加固方案;通过数值模拟实际工况和对施工过程的监测,验证设计方案的合理性。结果表明:TBM中板步进过站时,采用"弧底导轨"方案合理可行;在弧形导台沿TBM步进方向设置上翻梁以及梁下设置钢支撑体系,可保证TBM过站时中板结构的安全;中板结构受TBM荷载影响的范围主要集中在TBM机头作用点前方10m至后支撑作用点间的27m区域内;"弧底导轨"可有效地将TBM自重荷载传递给钢支撑体系和底板,确保中板结构的安全;车站中板内的上翻梁和梁下的钢支撑体系加强了中板结构的整体刚度,减小了变形开裂,保证了TBM过站后地铁车站的安全运营。
In order to investigate the technology of Tunnel Boring Machine（TBM）stepping-passing through the built medium plate of metro station,and based on the Line 6project of Chongqing Metro,the＂guide rail at arc bottom＂program for TBM stepping-passing through the medium plate of metro station and the reinforcement program for the medium plate of station were designed.The rationality of the designed programs was verified by the numerical simulation of the actual working conditions and the monitoring of construction process.Results showed that when TBM stepping-passed through the medium plate of station,＂guide rail at arc bottom＂program was reasonable and feasible.Setting upturned beam on arc-shaped guide platform and steel support system under the beam along the direction of TBM steppingpassing could ensure the safety of medium plate structure when TBM passed through.The influence scope of TBM load on the medium plate structure mainly concentrated within 27 mrange that was from 10 m before the action point of TBM head to the back support point.＂Guide rail at arc bottom＂program could effectively transfer TBM load to the steel support system and bottom plate,which could ensure the safety of medium plate structure.The upturned beam and steel support system under the beam in the medium plate of metro station have strengthened the integral rigidity of the medium plate structure,reduced deformation and cracking,thus ensured the safe operation of metro station after the TBM passing through.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2015年第2期52-59,共8页
China Railway Science
关键词
隧道掘进机
步进过站
车站中板
地铁工程
Tunnel boring machine Stepping-passing through metro station Station medium plate Metro engineering
