摘要
研究目的:道床横向阻力是保持轨道几何形位及无缝线路横向稳定性的重要参数。随着有砟轨道运营技术条件复杂化,对轨枕设计和选型提出更多挑战,发展更加安全、可靠、经济、可用轨枕技术方案成为研究热点。针对国内有砟道床上铺设双块式轨枕及其横向阻力研究较少的情况,本文通过进行一系列工况下双块式轨枕和Ⅲc型轨枕横向阻力试验,研究双块式轨枕横向阻力基本特性与影响规律。研究结论:(1)在相同道床断面条件下,双块式轨枕横向阻力高于Ⅲc型轨枕,前者较后者提高幅度13.6%~25.5%;(2)砟肩宽度增加,双块式和Ⅲc型轨枕的道床横向阻力均提高,但增长效果无明显差异;(3)砟肩堆高能显著提高双块式和Ⅲc型轨枕的道床横向阻力,如当砟肩堆高从0 mm增加到150 mm时,道床横向阻力分别增加4.2 kN(51.9%)、2.7 kN(38.0%),即砟肩堆高对双块式轨枕更有效;(4)本研究结论可为双块式轨枕在我国轨道工程上的应用奠定理论和试验基础。
Research purposes： The lateral resistance of the sleeper is an important parameter to the geometric stability of the track and the transverse stability of the CWR. With the development of ballasted track operation conditions becoming more complex, more challenges are posed to the design and selection of the sleeper and developing RAMS oriented sleepers has been a hot research point. There are few researches on the bi - block sleeper on the ballasted track bed and its lateral resistance in China. In this paper, a series of lateral resistance tests for the bi - block sleeper and the Ⅲc mono sleeper were carried out to investigate the basic characteristics and influence of the lateral resistance for the bi - block sleeper. Research conclusions： （ 1 ） Under the same ballast bed dimension, the bi - block sleeper produces more lateral resistance than the m c mono sleeper, with the variation of 13.6% -25.5%. （2） Raising the shoulder width can increase the lateral resistance of both the bi - block and m c mono sleeper with little difference. （ 3 ） Raising the shoulder height, which can significantly increase the lateral resistance, is more effective for the bi -block sleeper. For example, when the shoulder height increases from 0 mm to 150 mm, the lateral resistance increases by 4.2 kN （51.9%） for the bi - block sleeper, while 2.7 kN （38.0%） for the mc mono sleeper. （4） The conclusions of this paper lay the theoretical and experimental foundation for the application of the bi - block sleeper in the track engineering in China.
出处
《铁道工程学报》
EI
北大核心
2017年第11期23-26,80,共5页
Journal of Railway Engineering Society
基金
国家自然科学基金项目(51578051)
关键词
有砟道床
双块式轨枕
横向阻力
ballast bed
bi -block sleeper
lateral resistance
