随着第五次大提速,沪宁、津浦线列车日益呈现快速、重载、加密的特点。作为信号关键设备的提速道岔,一旦发生故障就会严重干扰运输生产。据统计,2003年南京电务段共发生各类设备故障49件,其中提速道岔故障20件,占了故障总数的40·8%,共影响了62趟列车。因此,提速道岔的运用质量 With the fifth big speed, Shanghai-Nanjing, Jin Pu line train increasingly fast, overloaded, encrypted features. As the speed-increasing turnout of the key equipment of the signal, once the breakdown occurs, it will seriously interfere with the transportation and production. According to statistics, in 2003, a total of 49 pieces of equipment failures occurred in Nanjing’s electricity service segment, of which 20 pieces of speed-raising turnouts accounted for 40.8% of the total number of failures, affecting a total of 62 trains. Therefore, the use of speed turnout quality