Pre-polishing construction method for seamless track steel rail

The invention relates to the technical field of railway track engineering, in particular to a pre-polishing construction method for a seamless track steel rail. The concept of defect grading is provided for the first time according to different degrees of rail surface defects of the steel rail, grade division is conducted on the different degrees of rail surface defects, a personalized profile grinding scheme is designed based on the grade, and the technical scheme that a small grinding machine and a grinding train are combined is adopted for key defects in a targeted mode. And the pre-grinding quality of the steel rail is effectively guaranteed. And meanwhile, the quality evaluation after polishing further promotes the improvement of the polishing quality, and the reliability of the polishing quality is ensured. And the polishing quality is evaluated through a third party, so that the reliability of the quality of the polished steel rail is effectively ensured. 本发明涉及铁路轨道工程技术领域，特别涉及一种无缝线路钢轨预打磨施工方法；针对钢轨不同程度的轨面