摘要
以北京地铁6号线田村车站工程为背景,借助数值模拟方法和现场实测数据,对洞桩法车站不同扣拱顺序对地表沉降的影响进行研究。研究结果表明:先边扣拱后中扣拱施工顺序下地表沉降比先中扣拱后边扣拱施工顺序下地表沉降小2. 06mm,减小幅度为5. 23%,两者对地表沉降影响范围大致相同;沉降差异主要发生在初支扣拱施工阶段;边跨扣拱施工会使中跨土体应力升高,不同扣拱顺序下中跨土体弹塑性状态有很大不同。
Based on the background of Tiancun station of Beijing Metro Line 6,numerical simulation method and field monitoring data were used to analyze the influence of the different arch construction sequences on the surface settlements of the metro station with PBA method.The results showed that:the surface settlement in the sequence that edge-arch supporting construction firstly and then middle-arch supporting construction was 2.06 mm,and decreased 5.23%settlement by the reverse order.However,the settlement range was on difference.The differential surface settlements mainly occured in arch-supporting construction stage.The soils stresses nearby the middle-arch supporting could be increased with edge-arch supporting construction,and the elastic-plastic state of these soils was significantly different under different construction sequences.
作者
李涛
贾奥运
徐公文
崔远
刘千
LI Tao;JIA Aoyun;XU Gongwen;CUI Yuan;LIU Qian(School of Mechanics and Civil Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;China Railway No.3 Engineering Group Co.,Ltd.,Taiyuan,Shanxi 030001,China)
出处
《施工技术》
CAS
2019年第1期61-65,78,共6页
Construction Technology
基金
"十三五"国家重点研发计划(2016YFC080250504)
国家自然科学基金青年科学基金项目(51508556)
中央高校基本科研业务费专项资金项目(2009QL02)
关键词
地铁车站
洞桩法
扣拱顺序
沉降
监测
subway station
pile-beam-arch method
arch construction sequence
settlement
monitoring
