【摘要】 基于工程实例,利用ANSYS有限元数值模拟方法,深入分析了地铁隧道开挖对临近建筑物墩基础的影响。研究结果表明:地铁隧道施工会引起墩侧摩擦阻力和墩底段轴力的变化。墩侧摩擦阻力沿墩身的分布由上而下表现为正摩擦阻力区、中性点和负摩擦阻力区;墩底段轴力随隧道开挖逐渐减小,而后受滞后的墩侧负摩擦阻力的影响表现为拉力且随深度的增加而逐渐增大。此时墩对隧道拱部围岩起"悬吊"作用,但对其自身的危害极大。更多还原

【Abstract】 Based on a subway tunnel excavation engineering practice,the influence of tunnel excavation on adjacent building pier foundation adjacent tunnel excavation was analyzed by ANSYS finite element method.The results show that subway tunnel construction will cause the change of the frictional resistance in the side of the pier and the axial force at the end of the pier.The distribution of the frictional resistance along the pier is divided into positive frictional resistance zone,neutral and negative frictional resistance zone.The axial force at the end of the pier gradually reduces with the excavation of the tunnel and then becomes rally by the impact of the lag negative frictional resistance which increases with depth.The surrounding rock at the top of the tunnel is suspended by the pier foundation which harms itself seriously.更多还原