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1 前言根据铁道部要求,京沪铁路在第六次大提速时,列车通过速度要求达到 200km／h,道岔通过速度是大提速的关键之一。60kg/m钢轨12号提速改进型 (VZ200)道岔其设计先进,结构牢固,养护工作量少,是一种适应我国铁路重载、快速的发展和需要的新型道岔,将大量铺设在提速线路上。
1 Preface According to the requirements of the Ministry of Railways, when the Beijing-Shanghai Railway is speeding up for the sixth time, the passing speed of the train needs to reach 200km / h. Passing speed is one of the keys to speeding up the large railway. 60kg / m Rails 12 Speed Improvement (VZ200) Turnout has advanced design, firm structure and less maintenance work. It is a new type of turnout that adapts to the heavy load and rapid development and needs of China’s railways and will be laid on a large number of speed-raising lines .