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在桥上铺设CRTSⅠ型板式无砟轨道后,梁轨相互作用机理、计算模型及设计参数与传统的有砟轨道明显不同。特别是在大跨度连续梁上采用CRTSⅠ型板式无砟轨道结构之后,其梁轨相互作用机理更加复杂。针对既有研究的不足,本文基于有限元方法建立纵横垂向空间耦合模型,对树酯填充层弹性模量、砂浆充填层弹性模量和扣件纵向阻力等设计因素的影响规律进行了计算与分析,对高速铁路长大桥梁CRTSⅠ型板式无砟轨道无缝线路的设计参数的选择提出了建议。
After the CRTS Ⅰ slab ballastless track is laid on the bridge, the interaction between beam and rail is obvious. The calculation model and design parameters are obviously different from the traditional ballastless track. Especially when the CRTS Ⅰ slab ballastless track structure is adopted on long-span continuous beams, the interaction between beam and rail is more complicated. Aiming at the deficiency of the existing research, this paper establishes the vertical and horizontal coupling model based on the finite element method, and calculates the influence law of the elastic modulus of filling layer, the elastic modulus of mortar filling layer and the longitudinal resistance of fastener Based on the analysis, some suggestions on the design parameters of the CRTS Ⅰ slab track seamless track for high-speed railway bridges are proposed.