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成昆线某隧道全长2731米,有2576米为密铺式轨枕板线路。轨枕板线路北端在半径为600米的缓和曲线上及中部在半径为1000米的曲线上外,其余大部分在直线上。线路纵坡约为13‰。隧道穿过云武岩,除中部的两处断层有少量漏水外,绝大部分水文地质较好。线路上部结构是以65型拱形弹片式扣件将50公斤钢轨固定在65B 型预应力粗筋混凝土轨枕板上。自1970年4月铺设到1972年初这段时间内,线路质量很差,尤其是高低、水平、方向及轨距超限等轨检车评分在2,000分以上。线路长期以20公里/小时的速度慢行,既影响运
Cheng Kun a tunnel length of 2731 meters, 2576 meters for the dense sleeper line board. The northern end of the sleeper line is on the curve with a radius of 600 meters and the curve at the middle with a radius of 1000 meters. Most of the rest is on the straight line. Line longitudinal slope of about 13 ‰. The tunnel passes through the cloud-wuyan, with the exception of a small amount of water leakage at the two faults in the middle part, with the vast majority of hydrogeology being better. The upper structure of the line is based on the 65-type dome-type clip-on fasteners 50 kg rail fixed to the 65B-type prestressed concrete slab. During the period from laying in April 1970 to the beginning of 1972, the track quality is very poor, especially when the track car scores above 2,000, such as height, level, direction and rail gauge overrun. Line long-term slow speed of 20 km / h, both affect the transport