摘要
道岔与无缝线路焊接后，随着轨温的变化，长钢轨纵向温度力将直接作用于道岔的撤叉和转撤部分。在无缝道岔的设计施工时，由于站内线路条件的限制，道岔侧线长钢轨的长度较短，在长钢轨温度力的作用下，道岔两尖轨的伸缩位移差较大，影响道岔的正常使用。为此，根据道岔区基本轨、导轨间的相互作用关系，分析计算了侧股为普通线路时，无缝道岔区钢轨纵向力及位移量的分布，并根据分析结果提出了改进措施，以保证道岔的正常使用。
When a turnout is connected with CWR through welded joints, the longitudinal rail temperature force acts directly on the frog and the switch section along with the variation of rail temperature. Due to limitations of track condition, the welded rail of the branch track of turnout has to be relatively short. Under the action of longitudinal rail force, a disparity in displacement between two switch rails is thus generated. This disparity will influence the operation of turnout. Taking this into account, a modeled theoretical analysis is made of the interaction between the stock rail and the lead rail to obtain the longitudinal rail forces and displacements, assuming conventional branch track. Based on the results of the analysis, some effective measure is given to assure normal operation of turnout.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
1997年第4期57-63,共7页
China Railway Science
关键词
侧线
无缝道岔
纵向力
位移量
道岔
Branch track of turnout, Turnout connected with CWR, Longitudinal rail force,Longitudinal rail displacement
