曲线平行布置法在多线桥布置上的应用

Application of Curve Parallel Arrangement Method in Multiple Tracks Bridge

研究目的:曲线平行布置法是铁路桥梁设计,特别是在曲线桥梁跨越公路、河流的设计中经常采用的一种布置方法。但通常采用的计算方法仅限于跨度较小的桥梁,为了解决这一局限性,本文将通过实例,研究曲线平行布置法在长达曲线桥梁上的应用。研究结论:曲线平行布置法在曲线桥,特别是小半径曲线桥设置中,体现了有立交条件和河流通航条件要求的桥梁布置优越性;铁路曲线桥梁设计中通常采用的曲线桥平行布置法计算模式,对于多跨度小半径曲线上的多线桥,将会出现梁缝超过30 cm或梁缝过小等不符合设计规范的问题,此时应根据实际情况进行调整;永定河特大桥曲线调整的经验及总结出的计算过程也可以应用于其它采用曲线平行布置法的曲线桥梁设计中。

Research purposes： Curve parallel arrangement method is a commonly used method for design of railway bridge, especially for the curve bridge crossing highway and river, but is generally used for small span bridge, so the research is done in this paper on application of this method in large span curve bridge for the purpose of enlarging the application scope of this method based on the example. Research concinsions：The application of curve parallel arrangement method in curve bridge, especially in small curve bridge reflects the bridge arrangement advantages of having overpass condition and ship passing requirement, but when application of the calculation mode of curve bridge parallel arrangement for the multiple - span small curve railway bridge, the bridge seam may exceed 30cm or be less than that of design, so it is necessary to adjust the seam according to the real situation. The experience and calculation process of Yongding River Bridge can be learnt for design of other curve bridge with curve parallel arrangement method.