抗浮计算是地下地铁车站设计的重点，而计算参数、计算模型的选取对抗浮计算结果有较大影响。抗浮计算中部分参数的选取尚无统一规定，且使用阶段结构底板，尤其是轨道范围内的位移控制尚未引起足够重视。针对广州地铁暹岗站抗浮设计，选取适当的计算参数及公式，并采用有限元结构计算软件分析结构底板位移，最终合理确定结构相关抗浮方案。在满足抗浮的同时，车站底板不仅需要满足结构挠度要求，还需要考虑使用阶段的结构位移。可采用有限元计算软件进行模拟计算。

Antifloating calculation must be made in the design of underground Metro stations. The selection of the calculation parameters and calculation models has great influence on the result of the antifloating calculation. However, so far there is no standard related to the selection of the antifloating calculation parameters, and the attention paid to the displacement of Metro station floors, especially the displacement of floor part within the track scope, is inadequate. In the paper, regarding the antifloating design of a Metro station in Guangzhou, proper calculation parameters and proper calculation formulas are selected, the displacement of the floor of the Metro station is analyzed by means of FEM program and proper antifloating design is determined. The design of the Metro station should not only satisfy the antifloating requirements, but also should satisfy the structural deflection requirements and the service structural displacement requirements. FEM program can be used in the antifloating design of the Metro station.