车站轨道梁站台梁一体结构设计研究

发布时间：2018-08-09 09:30

【摘要】：研究目的:目前国内城市轨道交通高架车站的轨道梁和站台梁都是按分开的两个结构设计的,这种结构占用的空间较大,造成车站规模变大,不利于节省工程造价,也不利于景观设计;同时地震时,由于轨道梁和站台梁之间没有连接,极易发生碰撞作用,导致轨道梁和站台梁发生破坏甚至倒塌。为了解决这些问题,本文提出一种新型的轨道梁站台梁一体结构,在满足车站使用功能的前提下,对结构的外观和受力进行优化。研究结论:(1)计算结果表明,该结构的各项指标均满足规范要求,结构安全可靠;(2)可以对预应力钢束进行优化,开孔范围内边主梁和中主梁采用不同的预应力钢束规格,使得二者的应力和变形基本相同;(3)开孔范围内边梁为T梁,截面抗扭刚度较小,可进一步优化截面,改善边主梁的受力;(4)道床板的厚度不宜过小,以免局部变形或局部的振动对轨道结构的平顺性产生影响,进而影响行车安全和舒适度;(5)本研究成果可广泛应用于城市轨道交通高架车站。
[Abstract]:Research purpose: at present, the rail beam and platform beam of the elevated station of urban rail transit in China are designed according to two separate structures. This kind of structure occupies a large space and causes the station scale to become larger, which is not conducive to saving the project cost. At the same time, because there is no connection between the track beam and the platform beam, it is easy to collide, which leads to the destruction and even collapse of the track beam and platform beam. In order to solve these problems, this paper presents a new type of rail beam and platform beam integrated structure, which can optimize the appearance and force of the structure under the premise of satisfying the station function. The conclusions are as follows: (1) the results of calculation show that each index of the structure meets the requirements of the code, and the structure is safe and reliable. (2) the prestressed steel beam can be optimized. The stress and deformation of the two beams are basically the same; (3) the edge beam is a T beam in the open hole range, and the torsional stiffness of the section is small, which can further optimize the section and improve the stress of the side main beam; (4) the thickness of the bed slab should not be too small. In order to avoid the influence of local deformation or local vibration on the ride comfort of track structure, the traffic safety and comfort can be affected. (5) the research results can be widely used in urban rail transit elevated stations.
【作者单位】：中铁第四勘察设计院集团有限公司;
【分类号】：U291.6;U448.13

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