Bi-Level Programming Optimization Model of Airfield Surface Elevation Design

Abstract:

In order to design an elevation surface of the airfield area that meets the standards and has the lowest cost， this paper divides the skeleton and the twisted surface in the airfield area. The upper-level planning determines the specific position of the skeleton from a global perspective. Based on the results of the upper-level planning， the lower-level planning aims at the degree of fitting between the local surface and the natural ground， connecting the skeleton and optimizing the design of the twisted surface. These form an optimization model of the airfield area elevation design based on bi-level programming. Finally the genetic algorithm is used to solve the problem. The elevation design example of Sanming Airport calculated by using this model shows that the drainage， slope， and slope section design of the optimized model meet the existing requirements， and compared with the actual project， it is more in line with the natural terrain. The filling volume is reduced by 7.50%， the total earthwork is decreased by 8.06%， and engineering cost is reduced by 10.73%.

Key words:airfield area;elevation design;earthwork optimization;bi-level programming;genetic algorithm