The lateral stability of ballasted track becomes more important because of the safety requirement under the demand of higher train speed and heavier axle load. To increase the lateral resistance of ballast bed, this paper proposes three types of new sleepers, frictional sleepers. The frictional sleepers are sleepers with different shapes of textures attached at the sleeper bottom. To study the application feasibility of the frictional sleepers, experimental tests (single sleeper pull-out test) and numerical simulation (discrete element modelling) are performed. The lateral resistances of the three types of frictional sleepers are compared with the traditional sleeper based on the experimental test, and the mechanism of the lateral resistance increase is revealed according to the numerical simulation. The results indicate that the frictional sleepers can increase the lateral resistance by 32% (maximum), due to the enhanced interaction between sleeper and ballast particles. More importantly, different types of frictional sleepers have different performances, and the optimal friction sleeper is confirmed. This study is helpful for the further research on sleeper design.

由于在更高的火车速度和更大的车轴载荷的需求下的安全性要求，压载轨道的横向稳定性变得更加重要。为了增加压载床的侧向阻力，本文提出了三种新型的枕木，即摩擦枕木。摩擦轨枕是在轨枕底部附有不同形状纹理的轨枕。为了研究摩擦轨枕的应用可行性，进行了实验测试（单轨枕拔出试验）和数值模拟（离散元建模）。通过试验，比较了三种类型的摩擦轨枕的侧向阻力与传统轨枕，并通过数值模拟揭示了侧向阻力增大的机理。结果表明，由于轨枕和道ast颗粒之间的相互作用增强，摩擦轨枕的侧向阻力可增加32％（最大）。更重要的是，不同类型的摩擦轨枕具有不同的性能，并确定了最佳的摩擦轨枕。该研究有助于进一步研究轨枕设计。