Linear Planning-based Visible Scheduling Control System Of Subway

Project schedule is the basis of project period and other goals. Period delays and investment expansion will be reduced greatly if we have a more scientific project schedule. In construction process, two major categories of scheduling methods are constantly adapted: bar chart method (Gantt chart) and the Network Plan (commonly used Critical Path Method CPM). However, in the subway project, the two methods have the following deficiencies: firstly, the subway project involves wide profession, long construction period,and belongs to linear project. Therefore, we need to mark the same tasks at different work locations repeatedly during preparing the subway project schedule with the result that the schedule is very complicated and difficult to modify and update. Secondly, traditional methods are difficult to reflect overlap relationship among the various tasks carried out at different geographical location and the same work face, which is precisely the focus of the on-site progress managers. Furthermore, traditional methods can not solve the spatial conflicts in construction process. Because traditional methods do not convey the spatial properties of tasks, the project schedule managers can only rely on experience to imagine the possible space conflict in construction process.Therefore, this thesis proposes a subway schedule management method in order to simply express schedule of linear project and vividly reflect overlap relationship among the various tasks carried out at different geographical location and the same work face. And on this basis, we build 4D visualization schedule management system to effectively solve the space conflicts in construction, and thereby achieve real-time and precise control of project, enhance the level of subway schedule management, and improve investment returns.