承轨台与道床板相对高差对轨道结构静力学特性影响  

Influence of the relative height difference between rail bearing platform and track bed on the static characteristics of track structure

作　　者：黄辉 尹华拓 罗信伟 曾志平[2,3] 肖燕财 Huang Hui;Yin Huatuo;Luo Xinwei;Zeng Zhiping;Xiao Yancai(Guangzhou Metro Design and Research Co.,Ltd.,Guangdong Guangzhou,510010,China;School of Civil Engineering,Central South University,Hunan Changsha,410075,China;MOE Key Laboratory of Engineering Structures of Heavy Haul Railway(CSU),Hunan Changsha,410075,China)

机构地区：[1]广州地铁设计研究院股份有限公司,广东广州510010 [2]中南大学土木工程学院,湖南长沙410075 [3]中南大学重载铁路工程结构教育部重点实验室,湖南长沙410075

出　　处：《机械设计与制造工程》2022年第7期24-28,共5页Machine Design and Manufacturing Engineering

基　　金：广东省城市轨道交通工程建造新技术企业重点实验室科研项目(2017B030302009)。

摘　　要：为研究混凝土工程施工质量对地铁轨道受力特性的影响,基于有限元方法建立了无砟轨道静力学模型。模拟列车静荷载作用,对轨枕承轨台与道床板顶面之间相对高差为10~110 mm情况下的轨道力学特性进行了系统性分析。研究结果表明:轨枕最大主拉、压应力分别为1.553 MPa和3.037 MPa,道床板最大主拉、压应力分别为0.676 MPa和1.231 MPa,道床板的最大三向应力、最大主应力均小于轨枕,且均不到其1/2;随着相对高差的增大,轨枕最大主拉应力逐渐逼近抗拉设计强度。综合考虑列车静荷载作用下轨枕及道床板的受力特点,轨枕承轨台与道床板的相对高差为约50 mm为宜。In order to study the influence of concrete engineering construction quality on the mechanical characteristics of subway track,a finite element calculation model of ballastless track was established.The static load of the train was simulated and the mechanical characteristics of the track under the relative height difference of 10~110 mm between the rail bearing platform and the upper surface of the track slab were systematically analyzed.The results show the following:In terms of the maximum value of principal tensile and compressive stresses,for the sleepers,they are 1.553 MPa and 3.037 MPa,respectively,but for the track slab,they are 0.676 MPa and 1.231 MPa.The maximum three-dimensional stress and the maximum principal stress of the track slab were smaller than the sleepers,and the stress value was generally less than 1/2 of the latter.With the increase of the relative height difference,the maximum principal tensile stress of the sleepers gradually approached the tensile design strength.Considering the stress characteristics of the sleepers and the track slab under the action of the static train load,it is suggested that the relative height difference between the rail bearing platform and the track slab should be about 50 mm.

关 键 词：地铁 轨道结构 列车荷载 有限元 静力学 

分 类 号：U213.2[交通运输工程—道路与铁道工程]