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研究目的:利用新北碚嘉陵江大桥作大跨度连续梁桥及简支T梁上铺设无碴轨道的研究,意在突破大跨度桥及简支T梁上铺设无碴轨道的瓶颈,这对我国客运专线无碴轨道铁路的发展将具有极其重要的意义。研究方法:采用理论与实桥试验研究相结合的方法。建立轨—板—桥—墩一体化空间计算模型,线路纵向考虑钢轨、轨道板和底座板、桥梁等的相互作用。施工时安放测试原件,测试验证理论计算参数。研究结果:通过对在建的遂渝线新北碚嘉陵江大桥(94+168+84)m预应力混凝土连续刚构及其引桥24 m、32 m简支T梁上铺设无碴轨道的可行性进行了研究,确定了连续刚构及简支T梁上的无碴轨道铺设方案。研究结论:通过研究认为,在主跨168 m的预应力混凝土连续刚构及其引桥24 m、32 m简支T梁上铺设无碴轨道是可行的,拓宽了无碴轨道的适用范围,为我国客运专线无碴轨道铁路的发展积累了新的理论成果。
Research purposes: The use of new Beijiao Jialing River Bridge as a long-span continuous beam bridge and simply supported T-beam laying of ballastless track intended to break through the long-span bridge and simply T-beam laying ballastless track bottleneck, which is China’s passenger The development of green ballastless track railway will have extremely important significance. Research Methods: The combination of theoretical and experimental research on the bridge method. The integrated space calculation model of rail-board-bridge-pier is established, and the interaction between rail, track plate, base plate and bridge is considered longitudinally. Construction of the test placed the original test to verify the theoretical calculation parameters. Research results: The feasibility of laying ballastless track on pre-stressed concrete continuous rigid frame and its 24 m, 32 m simple T-beam in the new Beibei Jialing River Bridge (94 + 168 + 84) m on the Suining-Chongqing Railway The research has confirmed the ballastless track laying scheme on continuous rigid frame and simply supported T beam. Research conclusions: According to the research, it is feasible to lay ballastless track on the prestressed concrete continuous rigid frame with a span of 168 m and its 24 m, 32 m simply supported T-beam, and broaden the applicable scope of ballastless track as The development of China’s ballastless-track railway on passenger dedicated lines has accumulated new theoretical achievements.