Preventive Maintenance Sequence Compilation Model for Dynamic Subnet-level Expressway
With the continuous improvement on China's expressway network planning and construction,how to compile scientific and reasonable network-level maintenance sequence models with various constraints is one of the main issues that expressway maintenance departments facing in China.The current related studies on maintenance sequence mostly focus on the maintenance timing as a point of convergence,ignoring the road condition levels and maintenance cost values dynamically varying with time dimension.That is seriously inconsistent with the reality of multi-dimensional constraints during maintenance.In view of this situation,the preventive maintenance sequence compilation model for dynamic subnet-level expressway was established based on the time dimension.First,the maintenance process was optimized based on the theory of optimal preventive maintenance time segment.The more applicable network-level asphalt pavement preventive maintenance decision-making process was proposed.Second,the optimal preventive maintenance time segment was divided into N stages,and the time weights were introduced respectively.The issue about dynamic factor values varying with time dimension was transformed into the multi-stage decision-making issue.Finally,based on the fuzzy-type weight-unknown grey relational analysis method,a set of preventive maintenance sequence compilation model for dynamic subnet-level expressway considering time dimension was established.A subnet-level expressway asphalt pavement in Gansu province was taken as the case study.On the basis of ignoring constraints of fund allocation among subnet-levels,the optimal preventive maintenance scheme and the time segment were determined.The result indicates that the proposed model can efficiently compile the maintenance sequence of subnet-level expressway asphalt pavement in Gansu province considering the time dimension.
NETL
NSTL
万方数据
