我們学习了郑州鉄路局的經驗,曾在各主、次线路上試用无碴无枕鋼筋混凝土桥面,已达150余孔,共18种跨度,大者达12米,少数并設在弯道上,曲线半径最小为613米。1961年末曾进行一次較全面的质量調查,絕大多数质量良好。1962年进行了一次結构試驗,証实了結构上的优越。我們主要地采用了結合梁、迭合梁两种結构形式:在迭合梁中,鋼筋混凝土桥面板只是代替桥枕,因 We have learned the experience of Zhengzhou Kushiro Railway Bureau. We have tried on ballastless, non-pillow concrete bridge decks on all major and minor routes and have reached more than 150 holes with a total of 18 kinds of spans, the largest of which is 12 meters and the few are located on corners , The minimum curve radius of 613 meters. A more comprehensive quality survey was conducted in late 1961, the vast majority of which are of good quality. A structural test was carried out in 1962, confirming the structural superiority. We mainly use the combination of beams, two kinds of composite beam structure: In the composite beam, the RC bridge deck instead of only because of