城市轨道交通工程通风空调投资数据统计特征分析

Statistical Characteristics Analysis of Urban Rail Transit Project Air-conditioning Investment Data

目的:目前,城市轨道交通工程中的通风空调投资整体情况、变化趋势、统计特征等研究尚不全面,需对城市轨道交通工程中通风空调设备的投资现状与变化情况进行统计分析,以获得合理的通风空调投资金额参照指标。方法:根据通风空调系统的构成与特征构建样本数据库;根据样本类型、建设时期进行划分,对城市轨道交通工程中的通风空调投资数据的绝对值指标(单线投资、单站投资)和相对值指标(在总投资费用中的占比、在工程费用中的占比、在机电系统投资费用中的占比)的分布情况与变化趋势进行统计分析,并对影响城市轨道交通工程通风空调投资的部分关联因素进行了分析。结果及结论:城市轨道交通工程的通风空调投资费用在10项机电系统投资费用中排在第5位,单线投资指标为0.48亿~2.39亿元/线,呈回落趋势;单站投资指标为445万~1377万元/站,呈上升趋势;通风空调投资费用在总投资费用中的占比为0.44%~1.23%,在工程费用中的占比为0.72%~2.13%,在机电系统投资费用中的占比为2.45%~8.50%,这3项占比相对值指标均呈现“十二五”时期小幅增加、“十三五”时期明显降低、“十四五”时期显著回升的特征;上述投资数据绝对值与相对值的统计特征分析结果均与样本类型密切相关。

Objective:At present,comprehensive researches are still incomplete in terms of the overall situation,changing trends and statistical characteristics of investments in VAC(ventilation and air-conditioning)systems of URT(urban rail transit)project.It is essential to conduct a statistical analysis of the investment status and changing situation of URT project VAC equipment to obtain appropriate reference indicators for VAC investments.Method:A sample database is constructed based on the composition and characteristics of VAC systems,which is categorized according to sample types and construction periods.Absolute indicators(investment per single line and investment per single station)and relative indicators(percentage in the total investment,percentage in engineering cost,and percentage in electromechanical system investment)of VAC investment in URT projects are statistically analyzed for their distribution and changing trends.Additionally,some associated factors influencing the investment in URT project VAC systems are explored.Result&Conclusion:VAC investment in URT projects ranks fifth among the 10 electromechanical system investments.The indicator of investment per single line ranges from 48 million to 239 million yuan per line,showing a declining trend.The indicator of investment per single station ranges from 4.45 million to 13.77 million yuan per station,indicating an increasing trend.The percentage of VAC investment in the total investment ranges from 0.44%to 1.23%,in engineering cost from 0.72%to 2.13%,and in electromechanical system investment from 2.45%to 8.50%.These three relative indicators exhibit a pattern of slight increase during the′12th Five-Year Plan′period,significant decrease during the′13th Five-Year Plan′period,and notable rebound during the′14th Five-Year Plan′period.The results of statistical characteristics analysis on both above absolute and relative investment data are closely related to sample types.