高速铁路无砟轨道聚氨酯嵌缝胶快速修复技术  

On Technology for Rapid Repairing of Polyurethane Joint Sealant for High-Speed Railway Ballastless Track

作　　者：靳昊[1] 李育宏[2] 易忠来[1] 陈云峰[2] 李化建[1] 

机构地区：[1]中国铁道科学研究院铁道建筑研究所,北京100081 [2]兰州铁路局,甘肃兰州730000

出　　处：《中国铁路》2017年第2期62-66,共5页China Railway

基　　金：中国铁路总公司科技研究开发计划项目(2013G008-A-3);中国铁道科学研究院科技研究开发计划项目(2015YJ042)

摘　　要：通过调研高速铁路无砟轨道聚氨酯嵌缝胶的服役情况,总结其伤损类型为聚氨酯嵌缝胶开裂、离缝、发泡起鼓、分层和凝胶未固化5类;结合在役"天窗期"修补特点,提出了局部修复、表面封闭和整体更换的快速修复工艺;优选硅酮嵌缝胶和非硫化丁基橡胶作为聚氨酯嵌缝胶的修复材料,并提出相关性能要求。该研究对高速铁路无砟轨道失效嵌缝材料快速修复方法提供技术支持。With survey of conditions of polyurethane sealant for high-speed railway ballastless tracks, five main fl aw types of the sealant are presented, namely cracks, open joints, foaming and bulging, stratifi cation and uncured gel. This paper, based on the characteristics of repairing of in-service sealant during the maintenance windows, presents rapid repairing processes like local repair, surface closure and overall replacement. Meanwhile, silicone sealant and unvulcanized butyl rubber are selected as materials for repairing polyurethane sealant, and relevant requirements on performance are presented. The study provides a technical support for the rapid repairing of failed sealant for ballastless tracks of high speed railway.

关 键 词：无砟轨道 伸缩缝 聚氨酯 硅酮 嵌缝胶 修复 

分 类 号：U216.9[交通运输工程—道路与铁道工程]