System Dynamics-Based Identification of Mechanical Factors for Metro Construction Schedule Management

The scale of rail transit has been increasing recently, which lead to demanding requirements the management level for metro projects. To effectively control the construction schedule of the metro shield project, system dynamics is an effective method of dynamic control, so it was introduced to this article. This paper proposes to study the influence level of various factors on the construction schedule. Firstly, constructing various subsystems includes the shield launching, the shield tunneling and segment assembly subsystems. Secondly, a total system dynamics model can be established based on the relationship between the various subsystems. Finally, the shield machinery influence factors functions are obtained by questionnaire survey and the analytic hierarchy process method (AHP), and the functions are input into the system dynamics model to simulate the construction schedule. The results show that the metro construction model has a high fit with the actual construction operation, which can effectively reflect the actual schedule of metro construction. Through the forecast of the construction schedule, the project manager can obtain decision-making reference and comprehensively understand the project progress.