铁路球型调高支座的设计与试验研究

Design and Experimental Study of Railway Spherical Height-adjusting Bearing

为确保高速铁路行车的安全性和旅客舒适性,要求桥梁结构应具有较高的平顺性。然而受温度、收缩徐变和基础不均匀沉降等因素的影响,桥梁不可避免会发生沉降变化。目前无砟轨道的扣件调整量较为有限,为保证轨道结构的平顺性,文章在对已有成果对比分析的基础上,结合实际工程需求,研发了一种新型楔形板调高支座。该支座构造简单,在满足梁部结构受力和变形的基础上,可实现高度的无级调整,对确保列车运行的舒适性与安全性、减少桥梁与轨道结构次内力有重要意义。

In order to ensure the safety of the high-speed operation and passenger comfort,bridge structure should have high smoothness. However,affected by temperature, shrinkage and creep,and uneven foundation settlement, bridges have inevitable subsidence changes . The adjustment amount of ballastless track fastener is limited. To guarantee the smoothness of track structure,on the basis of comparative analysis,combined with the actual project requirements,a new type of wedge-shaped railway spherical height-adjusting bearing is developed whose structure is simple. On the basis of satisfying the stress and deformation of beam structure, stepless adjustment of height can be realized, which is of great significance for ensuring the comfort and safety of train operation and reducing the secondary internal forces of bridge and track structure.