一种连续梁式架空轨束梁分析与实践

Analysis and application of an overhead rails continued beam

按连续梁架空方式设计了一种跨度达8.6 m,最大挠度仅为9 mm的轨束梁,经检算和实际使用均满足施工要求。为检验轨束梁的设计计算方法的正确性和实用性,对岳阳卫生所框架涵施工中采用的按连续梁式架空轨束梁纵梁的最大挠度进行计算,计算值与实测值接近,最大挠度计算值为7.6 mm,最大挠度实测值为7 mm。理论计算及工程实践表明本连续梁式架空轨束梁的设计计算方法可靠,连续梁架空方式是提高轨束梁架空跨度的有效方法。

According to the continuous beam＇ s span computation theory, a rails beam with 8.6 m span and 9 mm uhimate vertical flexibility is designed in this paper, and this mils beam is applied in the cross between two railway, the practical construction results and the computation results of this rail beam show that this mils beam can solve the railway＇s crossing construction problem. A typical construction with rails beam in the Yueyang hygiene house is used to testify this rails beam＇s computation theory, and in the construction, the mils beam＇s ultimate vertical flexibility is computed. There is a good agreement between the computation results of vertical flexibility and the measured results, where the computed value is 7.6 mm and the measured value is 7.0 mm. The practical construction results show that the computation theory of this rails beam is credible and this rails beam is a good method to enhance rail＇ s span in the crossing site.