%0 Journal Article
%T 胶粘道床横向阻力特性试验和离散元分析<br>Experiment and DEM Analysis of Lateral Resistance of Glued Ballast
%A 肖宏
%A 令行&lt
%A br&gt
%A XIAO Hong
%A LING Xing
%J 西南交通大学学报
%D 2017
%R 10.3969/j.issn.0258-2724.2017.06.002
%X 为揭示胶粘道床横向阻力的工作机理，在高速铁路胶粘道床路段进行了横向阻力现场试验.分析了胶粘道床横向阻力的变化特征；利用离散元软件PFC3D（particle flow code in 3 dimensions）建立了胶粘道床三维模型，对胶粘道床内部接触力、应力进行了统计分析.研究结果表明：用胶状态下胶粘道床横向阻力值是有砟道床规范值的4.6倍，横向阻力提升显著；胶粘道床在提升横向阻力的同时，轨枕-道砟接触点压力值最大为1.2 KN，平均值为112.48 N，道砟仍处于良好的受力状态；道床全断面粘结时应保证枕下26 cm范围道砟胶喷涂的充分和均匀，以确保道床粘结效果的发挥；胶粘道床不同位置对横向阻力的分担比相对于有砟道床变化明显，胶粘道床枕侧承担63%、枕底承担24%、砟肩承担13%.<br>：Lateral resistance data were obtained through a field experiment in a high-speed railway to reveal the working mechanism of the lateral resistance of glued ballast. The change characteristics of the lateral resistance of the glued ballast were analysed. Moreover, a three-dimensional discrete element model was established by PFC3D. The contact force and stress of the glued ballast were also statistically analysed. The results show that the lateral resistance of the glued ballast is significantly improved, and its value is 4.6 times of the standard value of the ballast bed. The ballast can maintain a good force state under its high-lateral resistance state. The maximum value of the contact force between the sleeper and the ballast is 1.2 KN, and the average value is 112.48 N. When the whole section is bonded, a depth range of 26 cm must be ensured to be fully and uniformly bonded to ensure the bonding effect. Compared with the ballast bed, the sharing ratio of the lateral resistance significantly varies in different glued ballast positions. Furthermore, the lateral resistance of the glued ballast is mainly shared by the sleeper side, followed by the sleeper bottom and the shoulder with a sharing ratio of approximately 63%, 24%, and 13%, respectively
%K 胶粘道床
%K 横向阻力
%K 离散元模型
%K &lt
%K br&gt
%K glued ballast bed
%K lateral resistance
%K discrete element model (DEM)
%U http://manu19.magtech.com.cn/Jweb_xnjd/CN/abstract/abstract12501.shtml