高速铁路道岔与曲线间夹直线优化研究

Research on the Straight Line Optimization between Turnout and Curve of High Speed Railway

研究目的:世界各国对于高速铁路正线道岔与相邻曲线间直线段长度的规定各不相同,中国高速铁路的该项标准偏高,具备进一步优化的空间。本文通过对国内外高速铁路正线道岔与相邻曲线间直线段长度进行分析,提出中国高速铁路正线道岔与相邻曲线间直线段长度的优化方案,以指导高速铁路设计。研究结论:(1)对于高速铁路正线道岔与相邻曲线间的直线段长度,日本规定为20 m以上,德国没有明确的规定,法国也没有明确的规定,但在具体项目设计中规定岔前为0. 5Vd(Vd为列车侧向过岔速度),岔后为50 m;(2)中国高速铁路正线道岔与相邻曲线间的直线段长度建议优化为:一般条件下L≥0. 4V(V为道岔允许通过速度),困难条件下不应小于25 m;(3)建议对优化后的正线道岔与相邻曲线间的直线段长度标准进行实车验证;(4)本研究成果对高速铁路设计具有借鉴意义和指导作用。

Research purposes: The length of linear section between main turnout and adjacent curve of high speed railway varies from country to country in the world. The standard of China’s high-speed railway is on the high side and has room for further optimization. This paper analyses the length of linear section between main turnout and adjacent curve of high-speed railway at home and abroad,and puts forward the optimization scheme on the length of linear section between main turnout and adjacent curve of China’ s high-speed railway,to guide the design of high-speed railway.Research conclusions:( 1) For the length of linear section between main turnout and adjacent curve of high speed railway,it is stipulated to be over 20 m in Japan,not specified in Germany,and not specified in France,but in the specific project design,it is stipulated to be 0. 5 Vdbefore the turnout( Vdis the lateral turnout speed of the train),and50 m after the turnout.( 2) The length of linear section between main turnout and adjacent curve of China’s high-speed railway is suggested to be optimized to L≥0. 4 V( V is the allowable speed of turnout) under general conditions,and not less than 25 m under difficult conditions.( 3) It is suggested that the optimized length of linear section between main turnout and adjacent curve can be verified by the EMU.( 4) The research results have reference significance and guiding role for the design of high-speed railway.