建设工程材料供应分界方法的研究

Study on Demarcation Method of Construction Material Supply

在建设工程中,材料的运杂费是工程造价的重要组成部分,他由所确定的运输距离来决定。那么如何界定施工工点所用材料的运输距离的分界点,以此确定经济运距来计算运杂费。此文针对最大运距相等法和最大运价相等法进行分析,推导出2种计算方法的经济运距分界的表达式。并根据最大运距相等法和最大运价相等法原理、推导出的公式、假设条件和数据,对2个料源点供应的材料费用和运输费用进行计算与比较,结果显示,采用最大运距相等法计算出的材料费大于采用最大运价相等法计算出的材料费;采用最大运距相等法计算出的运输费小于采用最大运价相等法计算出的运输费,综合考虑后,采用最大运价相等法来计算和划分供应材料的分界点比较经济。

In the construction project, the material freight is an important part of the construction cost, which determined by the transport distance. So how to define the demarcation point of material transport distance of construction worksite, based on which to determine the benefit distance to calculate the freight. This paper analysis using the methods of the maximum distance equal and the maximum rate equal, the two ways calculation expressions of demarcation point of benefit distance were deduced. And based on the princi- ple of maximum distance equal and the maximum rate equal, the expressions deduced, assumptions and data, the material cost and transport cost of two material sources were calculated and compared, results show the material cost calculated by maximum distance equal method greater than the one calculated by maximum rate equal method, the transport cost calculated by maximum distance equal method less than the one calculated by maximum rate equal method. After comprehensive consideration, adopt maximum rate equal method to calculate the demarcation point of material transport distance will be more benefit.