To ensure the smoothness of the urban rail transit tracks and later traffic safety,this article utilizes Midas software to establish a simple girder bridge-ballastless track/phase II constant load loading cycle creepage model.It combines this model with different track laying time monitoring of simple girder creepage after tensioning of simple girders to study the creepage up-arch value of simple girders after track laying.The results indicate that,compared with track laying after 15 days and 60 days of pre-stressing,the difference of the mid-span creepage up-arch value is 6 mm after track laying,3.2 mm at 180 days(initial operation),2.9 mm at 1 year,and 3.0 mm at 10 years.The creepage up-arch value at the end of the 15-day tracking period is less than 5 mm,meeting the relevant specifiication requirements.This research can serve as a reference and example for determining the optimal track laying timing and construction process for standard simple girders in similar projects.
关键词
城市轨道交通/标准简支梁/徐变/上拱值/不平顺质量指数
Key words
urban rail transit/standard simple girder/creepage/up-arch value/uneven quality index
维普
万方数据