为分析和提高地铁车站通过设施的疏散能 力，保证乘客的运行安全，在分析地铁车站行人流运动 特性的基础上，利用 GEM( generalized expansion method) 算法，求解地铁车站乘客疏散模型，通过计算得到车站 疏散设施的拥堵概率、吞吐量等指标，给出地铁车站疏 散能 力 的 瓶 颈 点。以西直门地铁站为案例，证 明 将 GEM 算法应用于解决地铁车站人员疏散问题的可行 性，并在此基础上提出合理的进站线路疏散优化方案。

For analyzing and improving the evacuation ability of metro station facilities and ensuring the passengers' safety, GEM (Generalized Expansion Method) algorithm for passenger evacuation was adopted to establish the model of passenger evacuation based on analyzing the characteristics of passenger movement. Congestion probability and handling capacity of the evacuation facilities of the station were calculated; evacuation bottlenecks to the metro station were found out. Case study of Xizhimen Station was carried out to verify the feasibility of GEM algorithm to determine the evacuation capability of a metro station with the evacuation optimization scheme proposed with feasible approaching lines to the station.

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为分析和提高地铁车站通过设施的疏散能力，保证乘客的运行安全，在分析地铁车站行人流运动特性的基础上，利用GEM(generalized expansion method)算法，求解地铁车站乘客疏散模型，通过计算得到车站疏散设施的拥堵概率、吞吐量等指标，给出地铁车站疏散能力的瓶颈点。以西直门地铁站为案例，证明将GEM算法应用于解决地铁车站人员疏散问题的可行性，并在此基础上提出合理的进站线路疏散优化方案。