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为了进一步研究桥上无缝道岔受力和变形的特点,通过建立“岔—桥—墩”纵向相互作用一体化计算模型,分析道岔与桥梁的相对位置对钢轨、道岔、墩台等结构部件受力及变形的影响。经计算分析表明,随着道岔头部距连续梁桥左端梁缝距离的增大,基本轨伸缩附加力、伸缩位移、桥墩所受纵向力减小,翼轨末端间隔铁承受的纵向力增大;尖轨跟端限位器所承受的纵向力、尖轨与心轨相对于岔枕的纵向位移,并不随道岔头部距梁端的距离呈单向变化,只有当道岔头尾距离梁端在一定合适位置时,才能确保限位器受力、尖轨与心轨相对于岔枕的纵向位移最小。
In order to further study the characteristics of the stress and deformation of the seamless turnout on the bridge, the integrated model of longitudinal interaction of “turn-bridge-pier-pier” is established to analyze the relative position of turnout and bridge to the structure of rail, turnout, Part stress and deformation. The calculation and analysis show that with the increase of the beam gap between the head and the left end of the continuous beam bridge, the additional force, telescopic displacement of the basic rail, the longitudinal force of the bridge piers decrease, ; The longitudinal force of the sharp rail and the end stopper, the longitudinal displacement of the rail and the rail relative to the sleeper do not change unidirectionally with the distance of the head of the turnout from the beam end. Only when the head and tail of the head point are away from the beam end A certain position, to ensure that the stopper force, rail and rail relative to the longitudinal displacement of the sleeper with a minimum.