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Construction method for rail laying of monolithic rail bed of ultra-large-span steel box girder suspension bridge
The invention discloses a construction method for rail laying of a monolithic rail bed of an ultra-large-span steel box girder suspension bridge. The construction method comprises the following steps:1, measuring and obtaining a bridge deck foundation line shape of a bare bridge finished bridge of the steel box girder suspension bridge; 2, simulating the influence of a second-stage load on the bridge deck foundation line shape; 3, simulating the influence of shrinkage creep on the linear shape of the bridge deck foundation; 4, simulating the influence of uniform temperature rise and fall on the bridge deck foundation line shape; 5, obtaining a steel box girder suspension bridge rail surface construction line shape; 6, obtaining the relative elevation difference between the steel box girder suspension bridge rail surface construction linear elevation data and the steel box girder suspension bridge rail surface design linear elevation data; and 7, performing rail laying of the monolithic track rail bed through the relative elevation difference. A monolithic rail bed cast-in-place rail bed is adopted for rail laying, the rail line shape of the rail bed has no adjustable space, the flexibility of a steel box girder is large, the line shape is changed at any time under the influence of temperature, creep and live load, theoretical calculation and analysis are conducted on the bridge rail surface construction line shape, the difference value between the actual state and theoretical calculation is reduced, and rail laying construction is conducted in a relative rail bed thicknessmode.
本发明公开了一种超大跨度钢箱梁悬索桥整体道床铺轨施工方法，包括步骤：一、测量并获取钢箱梁悬索桥裸桥成桥的桥面基础线形；二、模拟二期荷载对桥面基础线形影响；三、模拟收缩徐变对桥面基础线形影响；四、模拟均匀升降温度对桥面基础线形影响；五、获取钢箱梁悬索桥轨面施工线形；六、获取钢箱梁悬索桥轨面施工线形高程数据和钢箱梁悬索桥轨面设计线形高程数据的相对高程差；七、利用相对高程差进行整体道床铺轨施工。本发明采用整体道床现浇道床铺轨，自身轨道线形没有可调整的空间，钢箱梁柔性大，线形受温度、徐变、活载影响随时变化，对桥轨面施工线形理论计算分析，减少实际状态与理论计算的差值，采用相对道床厚度方式进行铺轨施工。
Construction method for rail laying of monolithic rail bed of ultra-large-span steel box girder suspension bridge
The invention discloses a construction method for rail laying of a monolithic rail bed of an ultra-large-span steel box girder suspension bridge. The construction method comprises the following steps:1, measuring and obtaining a bridge deck foundation line shape of a bare bridge finished bridge of the steel box girder suspension bridge; 2, simulating the influence of a second-stage load on the bridge deck foundation line shape; 3, simulating the influence of shrinkage creep on the linear shape of the bridge deck foundation; 4, simulating the influence of uniform temperature rise and fall on the bridge deck foundation line shape; 5, obtaining a steel box girder suspension bridge rail surface construction line shape; 6, obtaining the relative elevation difference between the steel box girder suspension bridge rail surface construction linear elevation data and the steel box girder suspension bridge rail surface design linear elevation data; and 7, performing rail laying of the monolithic track rail bed through the relative elevation difference. A monolithic rail bed cast-in-place rail bed is adopted for rail laying, the rail line shape of the rail bed has no adjustable space, the flexibility of a steel box girder is large, the line shape is changed at any time under the influence of temperature, creep and live load, theoretical calculation and analysis are conducted on the bridge rail surface construction line shape, the difference value between the actual state and theoretical calculation is reduced, and rail laying construction is conducted in a relative rail bed thicknessmode.
本发明公开了一种超大跨度钢箱梁悬索桥整体道床铺轨施工方法，包括步骤：一、测量并获取钢箱梁悬索桥裸桥成桥的桥面基础线形；二、模拟二期荷载对桥面基础线形影响；三、模拟收缩徐变对桥面基础线形影响；四、模拟均匀升降温度对桥面基础线形影响；五、获取钢箱梁悬索桥轨面施工线形；六、获取钢箱梁悬索桥轨面施工线形高程数据和钢箱梁悬索桥轨面设计线形高程数据的相对高程差；七、利用相对高程差进行整体道床铺轨施工。本发明采用整体道床现浇道床铺轨，自身轨道线形没有可调整的空间，钢箱梁柔性大，线形受温度、徐变、活载影响随时变化，对桥轨面施工线形理论计算分析，减少实际状态与理论计算的差值，采用相对道床厚度方式进行铺轨施工。
Construction method for rail laying of monolithic rail bed of ultra-large-span steel box girder suspension bridge
超大跨度钢箱梁悬索桥整体道床铺轨施工方法
LI XIAOYAN (author) / QIN HONGFEI (author)
2020-05-15
Patent
Electronic Resource
Chinese
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