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挡肩裂纹是双块式轨枕预制的一项严重质量问题,将直接导致轨枕报废,若控制不到位,将给企业造成严重经济损失。以新建贵阳至广州铁路广宁轨枕预制场双块式轨枕施工为例,从脱模机构、混凝土配合比、混凝土养护等方面分析了挡肩裂纹出现的原因,并制定出针对性措施,为以后双块式轨枕的质量控制提供参考和借鉴。
Shoulder crack is a serious quality problem prefabricated by double block sleepers, which will directly lead to the sleeper scrapped. If the control is not in place, it will cause serious economic losses to the enterprise. Taking the double-block sleeper construction of the sleeper prefabricated yard of Quang Ninh from Guangming to Guangzhou as an example, this paper analyzes the reasons for the emergence of the crack on the shoulder from the aspects of demoulding mechanism, concrete mix ratio and concrete curing, and formulates the corresponding measures for future The quality control of double block sleeper provides reference and reference.