（1 广东水电二局股份有限公司  广州  511340； 2 华南理工大学土木工程系  广州 510640）
［提要］  应用三维有限元分析，采用增量计算方法，对某围堰工程承台钢板桩围护结构进行了动态施工力学的三维数值模拟。重点分析了施工过程中钢板桩的侧向位移、弯矩、圈梁的弯矩和钢管的支撑轴力等发展规律。研究结果表明，该围堰工程承台钢板桩围护结构设计
和施工方案在理论上是安全可行的。
［关键词］  围堰工程  钢板桩  动态施工  三维数值模拟
3D Numerical Simulation on Staged Construction Mechanics for a Steel Sheet Pile Cofferdam Project/Xie Xiangming1，2，Liu Tingjin2，Mo Haihong2 (1 Limited Share Company of Second Bureau of Water Conservancy and Hydropower Engineering of Guangdong Province, Guangzhou 511340，China; 2 Department of Civil Engineering, South China University of Technology, Guangzhou 510640，China)
Abstract:The staged construction mechanics of the steel sheet pile retaining structure for a cofferdam project are numerically simulated using 3D FEM incremental computing method. The lateral displacement and bending moment of the steel sheet pile, the brace bending moment and the steel pipe axial force are emphatically studied. The results indicate that the design of the steel sheet pile retaining structure and the construction scheme of the cofferdam engineering are feasibly in theory.
Keywords:cofferdam project； steel sheet pile； staged construction； 3D numerical simulation