摘要
介绍既有线改建纵断面设计优化ＣＡＤ系统的开发情况，主要包括系统结构、模块设计、关键技术、集成环境、功能和开发规划及其实现。
The sum of the weighted square of the cut-fill value is used as the objective function in the profille optimization design on the reconstruction of the existing line, the value of weight is calculated and analysed, and the satisfactory result shows the improved method is much better.
关键词
纵断面
优化设计
CAD
线路改造
铁路线路
track remodelling,longitudinal section design optimization,objective functions
