why do railway tracks have gaps in them
When railway tracks are laid the engineers leave a small gap between two rails. All metals expand when heated. If two railway tracks are laid together without any gap between them they will push against each other when they expand in the day time because of the heat of the sun, and when they cool down in the night they will contract and return to their original state pulling against each Pother. PThis constant pushing and pulling against one another when they heat and expand in the day time and cool down and contract in the night will result in the weakening of the joints between the two tracks and after a few days the two tracks may also break free from one another.
Such a situation will result in the derailment of the trains causing major accidents and loss of lives. So, the railway engineers always leave a small gap between two rails Pto compensate for the expansion of the rails during the hot day time and contraction during cold nights.
Railway tracks have gaps to allow for expansion when the tracks heat up. As the tracks get hotter, they expand and get slightly larger. Without the gaps, the tracks would buckle from the force of the expansion. They have fishplates located between the joins to force the rails back into lateral alignment and thus prevent derailments.
In modern continuously welded rail these gaps are often cut on a diagonal to prevent this misalignment. The thermal expansion and contraction of rail track is minimal and the forces push to the outside rather than along the rail. They are also there because segments of rail have traditionally been required to be removed and replaced easily and so had to be made a manageable length. Heat expands metal, to prevent buckling in the rails the tracks are in pieces with gaps. Another reason is in case of lighting strike the electric current can only travel as far as the first gap, this preventing electrical charge getting to a train car or electrical box. because the railway lines expand during the summer and by the friction of the train with it. if the gap is not kept the rail lines would expand and break. so to avoid the breaking of the rails the gap is kept There is gaps between railways because during summer when the sun will heat the rail which is made of iron will obviously expand.
After some calculation an approximate distance is left between them. After this answer you will ask but what in winter and how does the train pass on the gaps? So this gap is nothing for the train.
It is left so that during expansion when the railways will expand the rail will not change direction. For e. g:- imagine when you take 2 drinking pipe and joint them together it will change direction or even damage. when heat is supplied to a substance or material it will expand. during summer the tracks get heated as a result it will expand. if gaps are not provided, that may result in the bending of tracks. Railway tracks have expansion joints to prevent them from warping when they expand during very hot weather. The metal on railway tracks can conduct a lot of heat during sunny periods.
There are small gaps between the length of the railway track because when the temperature is hot the metal will expand and cause the train to crash. So if there is a gap between the length of the train tracks the metal wont join together and cause the train to crash. When the weather is hot have you ever noticed that the trains go slower? Thats just in case the metal joins together. A. thermal conductivity B. specific heat C. thermal expansion D. thermal insulation The gaps are there to allow for the expansion (lengthening) of the rails in hot weather. Without any gaps, the rails would buckle and go out of alignment.
- Autor: ArturElin
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