Why should sleepers be laid under the steel rail

Edit:Zongxiang Heavy Industry--Lucas Date:2020-06-02 09:49:59

Many people should have noticed that the train runs on rails, the steel rails are fixed on sleepers, and the sleepers are directly laid on the gravel of the roadbed.  Everyone must have wondered why the steel rail is not directly laid on the ground. railroad track for sale

After some exploration and consulting data, I found the cause of this problem.  Because the self-weight of the train and its load capacity are both very large, if the steel rail is directly laid on the subgrade surface, the foundation area of the steel rail and the subgrade surface is small, and the subgrade surface cannot bear such a large weight, uneven subsidence will occur. If the steel rail is fixed on the sleeper, some contact area will be enlarged. However, if the sleeper is directly laid on the subgrade surface, not only the direction is not easy to fix, but also subsidence will occur, which will also cause the rail to skew and make the road surface uneven. railroad track for sale

The sleeper is laid on the gravel of the roadbed, and the weight of the train is transmitted to the sleeper through the rail, and then transmitted to the larger roadbed surface through the sleeper, so that the contact area is increased, the pressure per unit area is reduced, and the roadbed surface can bear a large train weight.  Although it seems troublesome to fix the rail on the sleeper and lay the sleeper on the ballast, it can make the rail straight and ensure safe, smooth and high-speed running.  Therefore, this method is currently the most common and scientific and effective method. railroad track for sale

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