铁路工程材料经济运距计算方法及分析

工程材料的运杂费是工程造价的重要组成部分，他由采用的运输工具和运输距离所决定。如何在所设材料供应点满足工程用料量要求，且价格相等、运输单价相等的情况下，使运距最为经济，此文对几种运距的计算进行推导与说明，并以某拟建工程为例进行计算与比较。结果显示，采用平均运距相等法得出的经济运距稍微偏大，采用线性规划法得出的经济运距稍微偏少，但相差不大。其后又对各自的适用条件和优缺点进行了对比，以期为工程建设管理提供参考。

Calculation Method and Analysis of Railway Engineering Material Economic Haul Distance

The freight and charges of engineering materials is an important part of the project cost ,which is determined the means of transport and haul distance. How to make the haul distance most economical under the condition that the material supplier meet the requirement of engineering and the price and transportation unit price are equal is need to be studied. The calculation of several haul distance were deduced and illustrated and an example was taken to calculate and compare. The results show that, the economic haul distance calculated using the method of equal average length is larger than that calculated by the linear programming method, but the difference is not big. Then the respective applicable conditions and advantages and disadvantages were compared, so as to provide reference for engineering construction management.