周转空间受限的装配式建筑准时(JIT)调度优化

Optimization of Just-in-Time (JIT) Scheduling for Prefabricated Buildings with Limited Turnover Space

摘要: 基于装配式建筑施工现场的调度特点，集成JIT调度优化，研究周转空间受限下的装配式建筑准时调度问题。综合考虑预制率、周转空间、JIT调度及不确定因素，以时间、费用及鲁棒性综合最优为目标函数，建立了有任务紧前关系的静态约束和常规资源及临时堆场动态约束的多目标调度优化模型，设计了嵌入爬山算法的非支配遗传算法求解。选取合适的测试算例证明了算法的有效性，探讨了预制率和临时堆场大小对于调度结果即工期、成本和鲁棒性的影响。实验结果表明，所设计的算法对解决这类复杂问题合理有效。项目的工期、成本、鲁棒值对预制率并不敏感，但增大临时堆场面积可以有效缩短项目工期，缩短项目工期的效果与临时堆场面积反相关。

Abstract: Based on the scheduling characteristics of assembly construction site, integrated JIT scheduling optimization, we study the just-in-time (JIT) scheduling of prefabricated buildings with limited turnover space. Focused on the prefabrication rate, turnover space, JIT scheduling and uncertain factors, a multi-objective optimization model of time, cost and robustness, with static constraints of the task precedence and fluctuating constraints of the conventional resources and temporary storage yards is proposed. Then a non-dominated genetic algorithm embedded with a hill climbing algorithm is developed. To show the performance of the proposed algorithm and to analyze the influence of the prefabrication rate and the size of the temporary storage yard on the scheduling result, numerical experiments are carried out and associated results are compared. The results show that the proposed algorithm is effective for solving the complex problem. The project duration, cost, and robustness value are not sensitive to the prefabrication rate, but increasing the temporary storage yard area can effectively shorten the project construction period, and the effect of shortening the project construction period is inversely related to the temporary storage yard area.