CRTS Ⅰ型双块式无砟轨道路基的力学特性分析

Numerical Analysis of Mechanical Characteristics of CRTS-I Bi-block Sleeper Ballastless Track Subgrade

我国无砟轨道铁路主要铺设有双块式无砟轨道、板式无砟轨道等。文章基于ABAQUS有限元软件,仿真分析不同轴重作用下CRTS I型双块式无砟轨道路基各部位的受力特性,研究列车轴重对无砟轨道的影响。研究表明轮载力作用下双块式无砟轨道的影响范围主要为5根轨枕。ZK标准荷载作用下,基床表层表面、基床表层底面、基床底层底面的压应力最大值分别为19.1kPa、18.1kPa、7.51kPa,竖向位移最大值分别为0.3mm、0.27mm、0.115mm。

Bi - block sleeper ballasfless track and slab ballasfless track are widely laid for China＇s railway lines, Through analysis of load-carrying capability of bi-block sleeper ballastless track under different axle load based on ABAQUS finite element software and simulation, this paper studies the influence on ballastless track from train axle load, It indicates that five sleepers are chiefly subjected to the influence from hi-block sleeper ballastless track under the action of wheel loading. Under the action of ZK standard load, the maximum value of pressure stress is respectively 19. 1 kPa,18.1 kPa,7.51 kPa for the face of surface layer of subgrade bed, undersurface of surface layer of subgrade bed and undersur- face of bottom layer of subgrade bed. The maximum O. 115 mm value of vertical displacement is respectively 0.3 mm,0. 27 mm,