跨区间无缝线路技术及养护维修.doc

2011届毕业设计（论文） 题目：跨区间无缝线路技术及养护维修911010200697 姓 名：阳 豆 指导教师：刘德辉 2012 年 3 月 摘 要 跨区间无缝线路是同重载高速铁路相适应的轨道结构，由于彻底实现了线路的无缝化，提高了轨道结构强度，优化了行车条件，改善了线路工况，减少了养护维修材料和劳力消耗，突出了无缝线路的优越性，已成为了我国铁路线路的主要发展方向。 论文对跨区间无缝线路的发展进行了综述，介绍了我国在这方面所进行的多次试验，总结了大量的实践经验，认为钢轨焊接质量的提高，胶接绝缘接头的成功，可动心轨道岔的研制，是推广跨区间无缝线路的根本保证。 阐述了无缝线路的基本结构和基木原理。由于跨区间无缝线路要与道岔焊在一起，而且道岔本身也应焊连成无缝道岔，为适应高速重载运输，对轨道结构有较高的要求。 研究了跨区间无缝线路的两项关键技术，即钢轨绝缘接头的处理和可动心轨无缝道岔的应用,研制了两种钢轨绝缘接头胶接技术，比较了厂制胶接轨与胶接绝缘夹板的使用效果，认为胶接绝缘夹板是一种可以替代厂制胶接轨的实用技术，更便于跨区间无缝线路的推厂应用。总结可动心轨无缝道岔的结构特点，养护维修技术条件，认为该道岔是实现无缝线路跨区间的重要结构保证。 着重论述了跨区间无缝线路的养护维修技术条件、技术标准及方法。提出跨区间无缝线路铺设前，应对线路进行整修，铺设初期仍要继续整修，是发挥无缝线路优越性的基础工作：在日常养护维修中，要严格控制锁定轨温变化，使无缝线路经常保持稳定状态; 关键词：跨区间无缝线路、钢轨焊接、轨绝缘接头、轨道结构标准、维修养护 Abstract Interregional LWR is a kind of track structure which applies for high speed and heavy haul operation. Because of joint free rail, track structure is strengthen, riding condition is optimized, railway condition is improved, material of maintenance and consume of staff is reduced, and advantage of LWR is obvious. So LWR has been trend of rail track development in china. The development of interregional LWR is summarized, many test in this domain in our country is introduced, and a great deal of practice experience is summed up in this paper. According to these experience, I think that improving the quality of rail weld, success of glued insulated joint and developing swing nose frog are precondition of generalizing interregional LWR. Basic structure and theory of LWR are elaborated in this paper. In order to meet the requirement of high speed and heavy haul operation, interregional LWR and turnout should be welded together, and turnout must be welded into joint free turnout. It can be concluded that 60Kilogram per meter or heavier rail, modelⅡandⅢconcrete ties, modelⅡandⅢfastenings, glued insulated joint, high quality ballast, and joint free turnout are track structures which accord to interregional LWR. Two kinds of key technology for interregional LWR, disposal of