摘要
以天津津滨轻轨天津站至七经路站的盾构施工区间工程为对象,对多条铁路轨道下,盾构长距离推进过程中引起的地表变形进行了三维有限元数值模拟,根据模拟结果分析了盾构施工导致沿盾构方向和垂直于盾构方向的地表沉降量,总结了盾构施工各阶段发生的地表沉降变化规律;研究了盾构掘进对地表的扰动范围;模拟和分析了不同工况下盾构施工引起的地表沉降差异.结果表明,数值计算的地表最大沉降量在18~20 mm,与其监测值较吻合,注浆量对地表沉降的影响比注浆压力和土舱压力显著.
Based on the bid-section of Binhai mass transit from Tianjin station to Qijing road station,3D-FEM was put forward to simulate shield tunneling long distance under multi-tracks of railway.According to the simulation results,settlement of ground surface along and perpendicular to the shield tunnel were analyzed.The disturbance area of ground and the settlement ratio dedicated by first tunnel and second tunnel were studied.The ground settlements caused by tunneling in different conditions were simulated and studied.The simulation results which fit well with monitoring data show that the maximum settlement of ground is between 18 mm and 20 mm.The influence of grouting amount is more significant than that of grouting pressure and soil pressure.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2011年第5期672-676,共5页
Journal of Shanghai Jiaotong University
关键词
盾构施工
铁路轨道
地表沉降
施工参数
数值模拟
shield tunneling
railway track
ground settlement
tunneling parameters
numerical modeling
