双线插入段合理长度的确定,是一个长度的“优化”问题,是指在各种特定条件下,寻求经济合理的“双插”长度。 一、单线铁路进行“双插”的经济合理性及适用条件 当一条线路运量逐年增长,增长率在5％以下,而远期运量接近双线运量25O0万吨/年时,可采用修建“双插”的方式进行能力加强。“双插”的适用范围较广,无论山区或平原 The determination of the reasonable length of the two-wire insertion section is a length “optimization” problem, which refers to the search for an economic and reasonable “double insertion” length under various specific conditions. I. Economic rationality and applicable conditions of “double plugging” for single-line railway When the volume of one line of traffic increases year by year and the growth rate is below 5%, and the forward traffic is close to 2.5 million tons / year of two-lane traffic, it can be adopted Constructed “double plug” approach to strengthen the capacity. “Double insertion” is applicable to a wider area, regardless of mountain or plain