铁道标准设计
鐵道標準設計
철도표준설계
RAILWAY STANDARD DESIGN
2015年
1期
33-36
,共4页
温度力%单元板%无砟轨道%横向变形%稳定性
溫度力%單元闆%無砟軌道%橫嚮變形%穩定性
온도력%단원판%무사궤도%횡향변형%은정성
Temperature force%Unit slab%Ballastless track%Lateral deformation%Stability
为了研究无砟轨道钢轨横向稳定性，以曲线上单元板式无砟轨道无缝线路为对象，建立包括钢轨、扣件、轨道板和限位部件的无砟轨道钢轨横向变形计算模型，结合不同轨道板长度分析钢轨在温度力作用下的横向变形特性，讨论不同、限位部件弹性和初始弯曲半波长对钢轨横向变形幅值和扣件横向抗力的影响。计算表明，巨大温度力可导致钢轨沿线路纵向产生以轨道板为波长的周期横向不平顺，在小半径曲线地段，应采用刚度较大且塑性变形小的弹性限位垫层材料，重视半波长过小的初始弯曲的治理，并加强对钢轨横向位移和板端扣件使用状态的监测。
為瞭研究無砟軌道鋼軌橫嚮穩定性，以麯線上單元闆式無砟軌道無縫線路為對象，建立包括鋼軌、釦件、軌道闆和限位部件的無砟軌道鋼軌橫嚮變形計算模型，結閤不同軌道闆長度分析鋼軌在溫度力作用下的橫嚮變形特性，討論不同、限位部件彈性和初始彎麯半波長對鋼軌橫嚮變形幅值和釦件橫嚮抗力的影響。計算錶明，巨大溫度力可導緻鋼軌沿線路縱嚮產生以軌道闆為波長的週期橫嚮不平順，在小半徑麯線地段，應採用剛度較大且塑性變形小的彈性限位墊層材料，重視半波長過小的初始彎麯的治理，併加彊對鋼軌橫嚮位移和闆耑釦件使用狀態的鑑測。
위료연구무사궤도강궤횡향은정성，이곡선상단원판식무사궤도무봉선로위대상，건립포괄강궤、구건、궤도판화한위부건적무사궤도강궤횡향변형계산모형，결합불동궤도판장도분석강궤재온도력작용하적횡향변형특성，토론불동、한위부건탄성화초시만곡반파장대강궤횡향변형폭치화구건횡향항력적영향。계산표명，거대온도력가도치강궤연선로종향산생이궤도판위파장적주기횡향불평순，재소반경곡선지단，응채용강도교대차소성변형소적탄성한위점층재료，중시반파장과소적초시만곡적치리，병가강대강궤횡향위이화판단구건사용상태적감측。
In order to study the rail lateral stability of the ballastless track, CWR unit slab ballastless track on the curve is analyzed to establish a calculation mode for lateral deformation of the rail in ballastless track including rail, fastener, track slab and spacing parts. With reference to different lengths of track slab and the lateral deformation characteristics of the rail under temperature force, this paper addresses the effect of different elasticity of limiting parts and initial bending half-wavelength on lateral deformation amplitude value of the rail and on lateral resistance of fasteners. The calculation shows that periodic transverse irregularities of the rail are caused by significant temperature force in longitudinal direction of the line and along the length of track slab. Therefore, the underlay spacing materials with larger rigidity and smaller plastic deformation shall be used on curved sections of small radius. Treatment of initial bending with undersized half wavelength shall be emphasized and monitoring of transverse displacement of the rail and the fasteners at the ends of slab shall be reinforced.
