论文部分内容阅读
我国地形复杂,山区較多,铁路綫路中的弯道、大坡道及隧道所占的比重較大。拿弯道来讲,約占全国铁路总延长四分之一。弯道上鋼軌的使用寿命一般都很短,特别是半徑600米以下的弯道,鋼軌的使用寿命平均一般只有2～4年,一些貨运强度較大的干綫,其小半徑弯道上的鋼軌,甚至使用一年就因磨耗超限而被更換。大坡道及隧道内的鋼軌,也有类似短命的情况。这样每年不但要消耗国家的大量鋼材,而且給綫路維修养护工作带来了很多困难。随着铁路运量的不断增加,行車速度的日益提高,以及新建铁路的逐年增加。鋼軌强度不相适应的矛盾将会愈来愈严重。
The terrain in our country is complex with more mountainous areas. The corners, turnstiles and tunnels in railway lines account for a large proportion. Take the corner, about a quarter of the total extension of the national railway. The service life of the rails on corners is generally very short, especially for corners with a radius of less than 600 meters. The service life of rails is generally only 2-4 years. Some heavy cargo lines, rails on small radius corners , Even use a year due to wear and tear is exceeded and replaced. Ramps and tunnels inside the rails, there are similar short-lived situation. This will not only consume a large number of countries every year steel, but also to the maintenance of road maintenance has brought a lot of difficulties. With the continuous increase of railway traffic, the speed of traffic is increasing day by day, and the number of newly built railways has been increasing year by year. The incompatibility of rail intensity will be aggravating.