【摘要】 在既有线改建纵断面设计优化中，以抬落道量加权平方和为目标函数。对权的取值作了初步分析与计算，实例验算表明，方法正确，改善效果明显。更多还原

【Abstract】 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.更多还原