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梁轨相互作用对台后短路基上端刺设置的影响

ISSN号：1006-2106
期刊名称：《铁道工程学报》
时间：0
分类：U213.9[交通运输工程—道路与铁道工程]
作者机构：[1]西南交通大学,成都610031, [2]中铁武汉勘察设计研究院有限公司,武汉430074, [3]西南交通大学高速铁路线路工程教育部重点实验室,成都610031
相关基金：国家自然科学基金委高铁联合基金重点项目“高速铁路轨道结构检测理论与方法研究”（U1234201）;国家杰出青年科学基金（51425804）;国家自然科学基金项目（51378439）;“高速铁路基础研究联合基金”重点支持项目（U1334203）

关键词：端刺, 桥上CRTSⅡ型板式无砟轨道, 短路基地段, 梁轨相互作用, 受力与变形, terminal spine , CRTS Ⅱ slab track on bridge , short subgrade section , interaction between beam and rail , force and deformation

中文摘要：

研究目的：端刺作为台后轨道结构的限位结构，是桥上CRTSⅡ型板式无砟轨道的重要组成部分。本文采用有限元方法建立线-板-桥-端刺-路基一体化计算模型，研究梁轨纵向相互力学行为对短路基地段端刺受力与变形的影响，并对短路基地段端刺设置方案进行优化，提出底座板在短路基上连续铺设、在底座板中部设置倒T型端刺并采用AB组填料填筑的方案。研究结论：（1）短路基上底座板连续铺设时，短路基长度对温度力下轨道结构一端刺的纵向受力与变形几乎没有影响，且端刺与摩擦板受力很小；（2）对比文中三种端刺设置方案，底座板连续且设置端刺时，连续梁右端钢轨纵向力与位移变化较为平缓，且钢轨纵向位移约降低22％；（3）提出的优化方案为：短路基地段底座板连续并设置倒T型端刺，但采用更经济适用的AB组填料填筑，检算结果表明，温度力作用下端刺与摩擦板的受力均较小，能够满足工程应用要求；（4）该研究结论可为CRTSII型板式无砟轨道设计提供一定的理论依据。

英文摘要：

Research purposes： The terminal spine behind abutment is used as the limit structure of the track structure, which is an important part of CRTS Ⅱ slab track. The rail - slab - bridge - terminal spine - subgrade integration finite model is established to research the influence of longitudinal mechanical behavior between beam and ballastless track on the force and deformation of the terminal spine on the short subgrade section, optimize the setting of the terminal spine on the short subgrade section, and put forward a project of foundation plate being laid continuously on the short setting T- spine. shaped subgrade, terminal spine in the middle of foundation plate and using AB group filling material filling the terminal Research conclusions：（ 1 ） When foundation plate is laid continuously on the short subgrade, the short subgrade length has little effect on the force and deformation of track structure and terminal spine under temperature force, and the forces of the terminal spine and friction plate are very small. （2） By the comparison of three kinds of the terminal spine setting project, when foundation plate is laid continuously and sets terminal spine, rail longitudinal force and displacement on the right side of continuous beam change more smoothly, and the longitudinal displacement is reduced by 22%. （3） Put forward the foundation plate being laid continuously and setting inverted T - shaped terminal spine, but using more economical AB Group filling are small under temperature material. The checking results show that the forces of the terminal spine and friction plate force and can meet the requirements of engineering application. （4） The relevant research results are helpful to the design of CRTS Ⅱ slab track.

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