铁路连续梁不同施工工艺的工期成本对比分析

Comparative Analysis of Construction Period Costs of Different Construction Techniques of Railway Continuous Beams

针对铁路连续梁现浇施工不同工艺的工期、成本问题展开研究,运用系统动力学软件VENSIM建立连续梁施工工期、成本分析的系统动力学模型。首先分析影响连续梁施工工期、成本的主要变量及其之间的逻辑关系和数学关系,并绘制出模型的存量流量图;然后结合银西线控制工程灵武西特大桥优化方案实例,仿真模拟其支架现浇法与悬臂浇筑法的工期、成本偏差。模拟结果显示支架现浇施工工艺在工期上较悬臂浇筑有较大优势,但是会增加施工成本。研究同时也验证了系统动力学方法在连相关工艺对比中的适用性。

This paper studies the construction period and cost of different processes of continuous beam cast-in-place construction.The system dynamics model VENSIM is used to establish the system dynamics model of construction period and cost analysis of continuous beam. Firstly, the main variables affecting the construction period and cost as well as the logical relationship and mathematical relationship between them of continuous beam are analyzed, and the stock flow chart of the model is drawn. Then, combining with the optimization scheme of Lingwuxi Bridge of Yinxi Line control project, the construction period and cost deviation of the cast-in-place method and the cantilever casting method is simulated. The simulation results show that the cast-in-place construction technology has a greater advantage over the cantilever casting in the construction period, but it will increase the construction cost. The study also validated the applicability of the system dynamics method in the comparison of related processes.