局部线性分布荷载作用下软土盾构隧道解析解

Analytic solution of shield tunnel in soft soil under partially linearly distributed load

通过对集中荷载作用下弹性地基梁挠曲曲线函数进行积分,推出局部线性分布荷载作用下软土盾构隧道结构简化为弹性地基梁进行纵向结构分析时挠度、转角、弯矩及剪力的解析表达式;并对上海地铁2号线的盾构隧道结构进行计算,得出其隧道结构纵向各个位置挠度、转角、弯矩及剪力的值,对局部线性分布荷载作用下软土盾构隧道结构纵向设计具有重要意义。

The analytic solutions of the displacement and internal forces of the shield tunnel constructed in soft soil under locally linearly distributed load, are concluded by integration of the function of deflection curve of Winkler＇s elastic foundation under concentrated load. and those formulas are used to calculate the displacement and internal forces of Shanghai metro line 2＇s shield tunnel built in soft earth under some locally linearly distributed load. The method of analyzing the structure of shield tunnel is helpful to the longitudinal structure design of shield tunnel, under any locally linearly distributed load.