Langsung ke konten utama

Why are there double train tracks on railroad bridges?

Why are there double train tracks on railroad bridges?

Hey there! 
Recently, a question has been bugging me, I'm sure a lot of you have noticed this too, but the train tracks on a bridge are always doubled up, like this:


Note the rails are doubled instead of single.


So, my natural reaction was writing a blog post about it.. And here we are, talking about trains


After some research, two possible answers came up, both are extremely interesting and.. I think both are true!

The uses of guard rails (check rails):

1. Double tracks reinforce sleepers (railroad ties) and prevent them from moving in and out of place:



Sleepers/ties are defined as rectangular supports placed under and perpendicular to the rails. sleepers function to transfer the weight of the train to the rockbed below and also to hold the rails in place and at the correct gauge.


The middle stuff are the sleepers/ties

That being said, the main rails hold the sleepers in place and the sleepers give support to the train passing by. But on a bridge, the expansion of the bridge occurs at different rates than the track it self, thus a system is designed so that the railroad tracks are semi-free to move.
That leaves the question of supporting the sleepers/ties. Since ties transfer mass onto the ballast (rocks underneath the railroad), they're essential.

These ties on bridges are supported by a second layer of rails, thus the double rail we see on bridges.


That was a very satisfying explanation, but I remembered seeing double tracks on sharp turns too..



2. Double railroad tracks hold the train in place during turns and reduces centrifugal force of the turn




Centrifugal force represents the effects of inertia associated with turning and which are experienced as an outward force away from the center of rotation. thus the likelihood for our train to flip onto its side.. 

Why does this ALWAYS happen to CN rail?

The double rails help minimize this tendency to swing outwards in a turn by contacting both sides of the inner wheel if the wheel lifts off the track because of centrifugal force. 


Its essentially the lifeline of the train in the case it makes the turn way too fast.
--------------

In summary, guard rails secure the railroad ties in place on a bridge and also prevent derailment by adding support for the inner wheels of the train.

Note how the wheels almost clip on to the outside and inside of the tracks.

Komentar

Postingan populer dari blog ini

Bagaimana Mendapatkan Reward PAW

PAW tho the moon!!!! Hadiah PAW Cara mendapatkan PAW Untuk mendapatkan PAW, Anda harus diundang terlebih dahulu. Setelah Anda diundang, Anda akan diberikan Kunci Hadiah PAW unik yang dengannya Anda bisa mendapatkan hadiah. Kunci itu memastikan setiap orang berkontribusi pada pertumbuhan jaringan dengan cara yang sah. Setiap upaya untuk menerima hadiah PAW yang tidak dengan cara yang sah atau tidak semestinya dapat mengakibatkan penangguhan kunci hadiah tersebut dan hadiah berikutnya. Siklus Hadiah Siklus hadiah adalah setiap 10 menit. Persentase yang didistribusikan untuk hadiah saat ini ditetapkan pada: - 80% undangan URL dan undangan twitter - 14% Pembuat konten - 1% Promotor - 5% Dibagikan di antara semua operator suku Persentase dapat berubah di masa depan menjadi apa yang paling mendukung model bukti pertumbuhan. Ada juga rencana untuk menambahkan metode lain ke model PoG. Hadiah Konten Hadiah PAW akan diberikan kepada siapa pun yang membuat konten terkait PAW yang men

Dimensions, Aren't They Fun?

Dimensions, Aren't They Fun? Howdy readers! Fission here to tell you the reality of the many dimensions. Please bare in mind the theoretical nature of this topic as it is impossible with modern science to physically examine other dimensions. Many people refute the concept of dimensions. These people are what I like to call, wrong. Typically, people dismiss their science fiction concept of what dimensions are. So, let me explain what's really going on. Look at the image below. Pretty boring, right? Wrong! What you see here is the first dimension! (Or a model of it...) This is not entirely accurate however. To truly represent the first dimension you would not be able to see the line as it would h ave no thickness. This is because the first dimension can only exist along the [x] axis (think graphically). The first dimension doesn't really do anything, so I'm going to move on. Below is a representation of the second dime