地铁运营隧道收敛变形分析

On Convergent Deformation of the Existing Metro Tunnel

结合上海轨道交通2号线人民广场站—南京东路站区间隧道,研究了地铁运营隧道收敛变形及其影响。阐述了上海轨道交通2号线人民广场站—南京东路站区间隧道收敛变形的测量方法与结果。结合改进的盾构管片接头模型对地铁运营隧道进行数值模拟计算,给出不同水平径向收敛时的管片内力数值。通过实测地铁运营隧道水平径向收敛变形,结合数值模拟和最大裂缝宽度理论计算结果表明:该区间上行隧道水平径向收敛普遍较大,最大可达77mm。衬砌管片的弯矩和裂缝宽度与水平径向收敛变形密切相关。通过理论计算,不同水平径向收敛变形时的裂缝宽度为腰部最大,拱底次之,拱顶最小。

Based on the case study of the tunnel between People s Square Station and East Nanjing Road Station of Shanghai Metro Line 2,this paper analyzes the convergent deformation and its influence on the tunnel,demonstrats the surveying methods and the surveyed results of this tunnel.Focusing on the improved model of shield tunnel s segment joint,this paper calculates the stress of the segments under conditions of different horizontal convergent deformations by using finite element method,and the width of fissures...