小半径上下重叠地铁盾构隧道设计与施工  

Design and Construction of an Overlapped Small Radius Metro Shield Tunnel

作　　者：叶雅图[1] 王世君[1] 王琪 

机构地区：[1]广州市地下铁道设计研究院,广州510000 [2]广州市穗城地铁设计顾问有限公司,广州510000

出　　处：《地下空间与工程学报》2008年第4期696-701,733,共7页Chinese Journal of Underground Space and Engineering

摘　　要：广州市轨道交通五号线某盾构区间受线路条件所限,在中间车站前后左右线以平面206m的小半径、纵断面30‰的急坡进入上下重叠状态。为对该段隧道开展设计工作,采用通用有限元程序ANSYS建立整体模型,对整个施工过程中的盾构管片内力分布、地层位移、隧道开挖先后顺序等关键因素进行了深入分析,并采用修正惯用计算法及直梁弹簧元错缝拼装模型对计算结果进行了校核,最后成功实施,并在其过程中获得了一些对小半径、近距离、上下重叠隧道设计的心得体会。One of the tunnels of Guangzhou metro line 5 is restricted by the line condition and the left line has to be lapped on top of the right hne with. a unfavorable line condition. For the need of the tunnel design, a massive FEM model with ANSYS is setup to analyze the internal force distribution of the tunnel tube - segments, the ground displacement, the tunnel digging sequence and other key factors. Later the Modified Consistently Used Method and the Beam model were adopted to verify the massive FEM model result and accomplish the tunnel design successfully.

关 键 词：盾构隧道 施工开挖 数值分析 

分 类 号：U455[建筑科学—桥梁与隧道工程]