针对有砟轨道稳定性差的问题。在铁路的养护维修工作中，对道砟进行胶固化处理，形成了一种较稳定 的新型道床形式-胶固化道床。根据道砟胶固化道床的特点，分别选择了道砟颗粒级配和聚氨酯粘结剂中 A 组多 异氰酸酯、B 组聚合物多元醇的使用配比作为变量，对 2 种不同级配和 3 种不同配比的道砟胶固化道床的力学特 性进行了研究；采用三视图立体重建的方法对道砟颗粒的几何形状进行基础重建，获得了较为真实的道砟颗粒结 构；在离散元仿真计算中，通过粘结模型建立的道砟胶固化道床模型进行仿真模拟。研究结果表明：在道砟胶固 化道床中，采用宽级配和 A:B=3:2 的道砟胶配比更有利于提高道床的力学特性。
To improve the stability of the ballast bed, the glue-solidified treatment was applied on the ballast to form a stable ballast bed (namely glue-solidified ballast bed) in the maintenance of the railway. According to the characteristics of the glue-solidified ballast bed, the ratio of Polyisocyanate (Group A) and Polymer polyols (Group B) in the ballast particle gradation and polyurethane binder was selected as variables. The mechanical properties of the glue-solidified ballast bed with two gradations and three ratios of ballast rubber were studied. The geometry of ballast particles was built by three-view stereo reconstruction to obtain the realistic structure of the ballast particle. In discrete element software, a complete ballast curing ball bed model was established and simulated based on the bond model. The results show that in the glue-solidified ballast bed, a wide gradation and A:B=3:2 the ballast rubber ratio of A:B=3:2 are more favorable to improve the mechanical properties of ballast bed.