高速铁路线路设备大修周期管理技术研究

Research on Overhaul Cycle Management Technology for HSR Line

针对我国早期开通的高速铁路线路设备即将面临的大修问题,按轨道部件分别确定大修周期的思路,提出高速铁路钢轨、扣件、道岔、轨枕、有砟道床等线路设备大修周期的建议。高速铁路钢轨大修周期为通过总质量不超过1000 Mt或服役时间不超过30 a;扣件弹条大修周期宜与同区段钢轨大修周期保持一致,即通过总质量1000 Mt或服役时间不超过30 a;成组更换有砟或无砟道岔钢轨件,建议通过总质量600 Mt或服役时间不超过20 a,对于状态良好的道岔,经评估后可适当延长,但不应超过区间线路钢轨的大修周期;以道床脏污率35%为标准,道床大修清筛周期建议为通过总质量450 Mt或服役时间不超过20 a;轨枕大修周期建议为通过总质量2000 Mt或服役时间不超过40 a,并可根据状态评估结果适当调整。

In response to the impending overhaul issues of the early-opened HSR line equipment in China,following the approach of determining the overhaul cycles according to track components,this paper proposes recommendations for the overhaul cycles of HSR line equipment such as rails,fasteners,turnouts,sleepers,and ballasted track beds.The overhaul cycle for HSR rails is defined as either a carrying tonnage not exceeding 1000 Mt or a service life not exceeding 30 years.The overhaul cycle for fastener clips should be consistent with the rail overhaul cycle of the same section,which is also based on a carrying tonnage of 1000 Mt or a service life of 30 years;for the replacement of ballasted or ballastless turnout rail components,it is recommended to adopt a carrying tonnage of 600 Mt or a service life of 20 years.For turnouts in good condition,the overhaul cycle may be appropriately extended after assessment but should not exceed the overhaul cycle for rails of the same section.Based on a ballast fouling rate of 35%,the recommended ballast overhaul and cleaning cycle is determined as a carrying tonnage of 450 Mt or a service life of 20 years.The recommended overhaul cycle for sleepers is a total carrying tonnage of 2000 Mt or a service life of 40 years,with adjustments made as appropriate based on condition assessment results.