紧贴桥梁桩底某暗挖区间施工对桥桩的影响分析  

Analysis on the Influence of Construction of Some Dark Excavation Section on Bridge Pile

作　　者：毕景佩 易领兵 杜明芳[3] 刘胜欢 李帅兵 朱亮亮 BI Jing-pei;YI Ling-bing;DU Ming-fang;LIU Sheng-huan;LI Shuai-bing;ZHU Liang-liang(Zhengzhou Metro Group Co.,Ltd.,Zhengzhou 450000,China;The Hand in Railway Design&Research Institute Co.,Ltd.,Beijing 100088,China;School of Civil Architecture,Henan University of Technology,Zhengzhou 450000,China;Sujiaoke Group Co.,Ltd.,Nanjing 210000,China)

机构地区：[1]郑州地铁集团有限公司,郑州450000 [2]中交铁道设计研究总院有限公司,北京100088 [3]河南工业大学土木建筑学院,郑州450000 [4]苏交科集团股份有限公司,南京210000

出　　处：《科学技术与工程》2020年第6期2448-2456,共9页Science Technology and Engineering

摘　　要：为研究紧贴桥梁桩底某暗挖区间施工对桥桩的影响,以下穿小月河桥的北京地铁27号线(昌平线南延)盾构区间隧道工程为背景,对下穿小月河桥段区间盾构隧道进行了设计,并用迈达斯/岩土和隧道分析系统(MIDAS/geotechnical and tunnel analysis system,MIDAS/GTS)有限元软件对盾构区间近距离下穿小月河桥进行有限元分析。研究了大断面盾构区间下穿小月河桥施工过程中桥面、盖梁及桥桩位移变化规律特征;总结了盾构区间近距离下穿桥桩施工过程中桥桩附加应力变化规律;揭示了盾构区间近距离下穿小月河桥施工过程中桥桩差异沉降变化规律。In order to study the impact of construction of a dark excavation section close to the bottom of the bridge pile on the bridge pile,the shield section tunnel project of the Beijing Metro Line 27(Changping Line South Extension)under the Xiaoyuehe Bridge is the background,and the shield section of the Xiaoyuehe Bridge section is under the bridge.The tunnel was designed.Using MIDAS/GTS(MIDAS/geotechnical and tunnel analysis system)finite element software,the finite element analysis was carried out for the bridge of Xiaoyuanhe in close range under the shield zone.The displacement characteristics of bridge deck,cover beam and bridge pile during the construction of Xiaoyuehe Bridge under the large section shield zone were studied.The change law of additional stress of bridge pile is summarized during the construction of bridge pile under close range of shield.The variation law of different settlement of bridge piles in the construction of Xiaoyuehe Bridge with close range of shield structure is revealed.

关 键 词：盾构隧道 下穿施工 近距离 迈达斯/岩土遂道分析系统 位移 应力 

分 类 号：U441[建筑科学—桥梁与隧道工程]