轨道交通工程统计数据正态分布特征研究

Research on normal distribution characteristics of statistical data for urban rail transit projects

文章以城市轨道交通工程多样本数据库中主要的工程规模类统计数据(线路长度、车站数量、车站总建筑面积等)与经济类统计数据(总概算、工程费、单公里技术经济指标等)作为研究对象进行统计学分析与验证,可获得上述统计数据均符合正态分布特征的重要结论。由样本工程的正态分布统计结果,可推断我国轨道交通行业总体层面的相关参数,并为行业分析与发展研究等相关工作提供必要的借鉴与数据基础。

The project scale data(including length of line,number of station,total floor area of station and etc.)and engineering economy data(including general estimate,engineering cost,cost index per kilometer and etc.)in urban rail transit engineering are taken as the research objects.By statistical analysis and verification,the important conclusions are obtained that all the above statistical data of multi-samples will be accordance with the basic characteristics of normal distribution.The statistical results of the normal distribution of the sample projects can be inferred to the relevant parameters at the overall level of the rail transit industry in China.The conclusions provide necessary reference and guidance for industry analysis and development research on urban rail transit projects.