摘要
根据佛山地铁2号线近接魁奇二路人行天桥桩基础不同工况,建立三维有限元数值模型,研究盾构施工顺序对邻近桥梁群桩基础的影响.结果表明:盾构施工会引起桩基础偏向开挖侧的水平位移,且水平位移最大值不超过2 mm,盾构施工对桩基础变形和弯矩的影响较小,桩基础处于安全状态;当左、右线相继掘进时,桩基础的水平位移小于单侧施工;为了减小盾构施工对桩基础变形的影响,施工时建议先掘进右线后掘进左线.
On the background of the Metro Line 2 of Foshan City near the pile foundation of the Pedestrian Bridge of Kuiqi 2 Road, a three-dimensional finite element numerical model was established to study the influence of shield construction sequence on adjacent group pile foundation. The results show that the shield construction will cause the horizontal displacement of the pile foundation to the excavation side, and the maximum horizontal displacement will not exceed 2 mm . The pile foundation is in a safe state because the effects of shield construction on the deformation and bending moment of the pile foundation are slight. When the left and right lines are successively excavated, the horizontal displacement of the pile foundation is smaller than that of the single side construction. In order to reduce the influence of shield construction on the deformation of pile foundation, it is recommended to dig into the right line firstly and dig into the left line secondly.
作者
王栓
WANG Shuan(College of civil engineering, Tongji University, Shanghai 200092, China)
出处
《南京工程学院学报（自然科学版）》
2019年第2期12-17,共6页
Journal of Nanjing Institute of Technology(Natural Science Edition)
关键词
隧道
盾构掘进
桩基础
数值分析
tunnel
shield excavating
pile foundation
numerical analysis
