在跨铁路桥梁施工中,修建人行天桥是满足施工人员通行和材料的转运的必要措施.以长春铁路综合货场工程为例,根据此工程人行天桥施工工期特征,基于动态规划算法将人行天桥的施工过程划分为3个阶段,每个阶段为一周,建立了动态规划数学模型,并对模型进行求解,获得了施工费用最低时的施工工序,有效降低了施工费用,具有一定的工程应用性.%In the construction of cross-railway bridges, the construction of pedestrian bridge is a necessary measure to meet the construction workers' access and material transfer. Taking the Changchun Railway Complex freight yard project as an example, according to the characteristics of this project pedestrian bridge construction period, the construction process of the pedestrian bridge is divided into three stages based on the dynamic programming algorithm. Each stage is one week, the dynamic programming mathematical model is established, and the model is solved to get the construction process at the lowest construction cost, effectively reducing the construction cost, so it has a certain degree of engineering applicability.
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