城市轨道交通固定资产更新改造技术条件研究

摘要

In order to strengthen the management of urban rail transit,the technical conditions of existing renewal and renovation were improved.Service life of capital assets and the health condition based on a reliability index were regarded as technical conditions for renewal and renovation.The estimation model for the service life of capital assets,which was based on the Weibull-Poisson process,and an evaluation model for the health condition of capital assets,which was based on the average failure rate,mean time between failures and average availability,were established.Finally,a case study on the technical conditions and the renewal and renovation models based on rail defects data of the up line on the Beijing Metro Line 2 was created.The results show that the technical conditions and the evaluation model of the improved renewal and renovation can be used to quantitatively analyze and evaluate the demand for renewal or renovation in urban rail transit.It solves the problems of insufficient live information due to the existing technical conditions as well as the problem of the lack of an evaluating index for health conditions.It has practicality and better maneuverability in the actual management of renewal and renovation of capital assets in urban rail transit.%为加强城市轨道交通固定资产更新改造的科学管理,提出将实际使用寿命和以可靠性指标为判定标准的健康状态作为其更新改造技术条件,并分别建立基于韦布尔-泊松过程的固定资产使用寿命估计模型和基于平均故障率、平均故障间隔时间和平均可用度的固定资产健康状态评定模型.最后,利用北京地铁2号线钢轨的伤损数据对提出的更新改造技术条件及评估模型进行实例验证.结果表明,改进的更新改造技术条件及评估模型能够对城市轨道交通固定资产的更新改造需求进行量化分析评定,在城市轨道交通固定资产更新改造实际管理中具有实用性和更好的可操作性.