研究目的：随着国内客运专线的建设，一些车站布置在高架桥上，无缝道岔对桥梁提出了特殊要求，桥式 布置需结合道岔进行(车站咽喉区宽度变化大，桥梁结构适应困难(无缝道岔对桥梁产生较大线路纵向力，使 桥梁下部结构设计困难。因此，有必要专题研究其桥式布置、上下部结构形式、梁轨相互作用、咽喉区桥梁动 力仿真分析。 研究结论：( 1)在咽喉区采用跨度基本为32. 7 B的梁式桥是合适的；（2)咽喉区桥梁宽度变化较大，横向 采用多种结构形式，能适应桥宽变化大的特点（（3)渡线区长联连续梁无设置多个固定墩的必要，仍采用单个 固定墩(（4)咽喉区道岔梁的纵向固定支座位置决定了桥墩无缝线路纵向力的大小，边梁承受的线路伸缩力 较大;（5)咽喉区道岔梁变化较多，需合理布置横向固定支座位置;（6)动力仿真分析验证了行车的安全性和 乘坐舒适性(（7)本文研究成果对客运专线高架站咽喉区道岔梁结构设计具有推广价值。

Research purposes: With the construction of the domestic passenger dedicated line，some station is located on the viaduct. Seamless switch puts forward special demands on the bridge，bridge type layout should be combined with switch. The width change of station throat area is big，and bridge structure has difficulties to adapt to it. The seamless switch force on the bridge is so large that the bridge substructure design is difficult. So it is necessary to research the switch beam V bridge layout， top and bottom structure form， interaction between beam and rail，bridge dynamic simulation analysis of passenger dedicated line elevated station throat area. Research conclusions ：( 1) In throat area using beam bridge that the span is 32. 7 m is appropriate. ( 2) Throat area bridge width change is big，it’s able to adapt to the characteristics by means of using many kinds of structure transverse forms. ( 3 ) The continuous beams on crossing line area are unnecessary to set up multiple fixed pier，still use a single fixed pier. (4) The longitudinal fixed support position of switch beam in throat area decides the size of the longitudinal force of bridge piers，the route expansion force of side beams is larger. (5 ) The forms of the throat areas switch beams change more， so it V necessary to research the reasonable position of their transverse fixed support. (6) Dynamic simulation analysis verifies the driving safety and ride comfort. (7 ) The research result has promotion value for design of the switch beam structure of passenger dedicated line elevated station throat area.