关键链地铁多项目进度管理研究

Research on Metro multi-project schedule management for critical chain

摘要:

地铁项目具有施工难度高,建设周期长,工程风险大等特点,传统项目计划方法与关键链技术很难保障其按计划实施。本文允许资源冲突发生在任意任务间,利用“鼓”资源可抢占的性质使任务被拆分执行,进而提出了多项目关键链模型;对具有开始-开始搭接关系的任务研究后发现,重叠任务间存在的耦合性使前置任务具有可吸收定量滞后工期的资源自由时差;结合冲突任务类型的分析及利用项目延期惩罚函数确定排序策略,提出关键链多项目调度启发式算法。通过实例验证了所提模型与算法的有效性。

Abstract:

Metro project has the characteristics of high construction difficulty, long construction cycle and high project risk. Traditional project planning method and critical chain technology are difficult to ensure its implementation according to plan. In this paper, resource conflicts are allowed to occur between arbitrary tasks. Tasks are split and executed by using the preemptive nature of "drum" resources, and a multi-project critical chain model is proposed. After studying the task with start-start overlap, it is found that the coupling between overlapping activities makes the pre-activities have resource constraint free absorbing Quantitative lagging scheduling. Based on the analysis of conflict task types and the use of project delay penalty function to determine the scheduling strategy, a heuristic algorithm for critical chain multi-project scheduling is proposed. The effectiveness of the proposed model and algorithm is verified by an example.