Health status assessment and maintenance strategy of transmission lines based on the concept of engineering vulnerability——Take Shanghai–Nanjing intercity railway as an example
基于工程易损性理念的线路健康状态评估及养护策略 ——以沪宁城际铁路为例

摘要

经观察发现，当下高速铁路在评价标准判定上存在一定的不合理，具体表现为仅有“维修”或“不维修”两种选择，这种“一刀切”评定方式对于目标多元化的高速铁路来说存在明显缺陷。即使有研究尝试将TQI与沉降观测相结合等方法，也可能产生“TQI超限但沉降未超限”或“TQI未超限但沉降超限”等评判结果不收敛的问题，对指导运营限速调整及养护维修作用有限。因此本文将以沪宁城际铁路为例，通过引入工程易损性理念，以期可以实现考虑结构损伤、功能损失及线路维护等方面的综合评价，为线路健康状态的正确评估及实际养护维修方案提供参考建议。

Abstract

Through observation, it has been found that there are certain irrationality in the evaluation criteria of high-speed railways at present, which is manifested as only having two options: "maintenance" or "no maintenance". This "one size fits all" evaluation method has obvious defects for high-speed railways with diverse objectives. Even if research attempts to combine TQI with settlement observation and other methods, there may be issues with non convergence of evaluation results such as "TQI exceeding limit but settlement not exceeding limit" or "TQI not exceeding limit but settlement exceeding limit", which has limited guidance on speed limit adjustment and maintenance and repair. Therefore, this paper will take the Shanghai–Nanjing intercity railway as an example, by introducing the concept of engineering vulnerability, in order to achieve a comprehensive evaluation considering structural damage, functional loss and line maintenance, and provide suggestions for reference for the correct assessment of line health status and actual maintenance and repair programs.