Expansion gaps in railways are they really neccesary?

[simplemind]

Physics teacher said expansion gaps in railways are a must to prevents rails from buckling during hot weather. Good! The trouble is gaps cause discomfort and noise as train wheels go over the gaps. Seems the gaps were not necessary after all,British railway and host of other Railway network have continuous welded railways which offer smooth less noisy ride. How come continuous welded rails don't buckle in hot weather?

 

[ymollel]

Physics teacher said expansion gaps in railways are a must to prevents rails from buckling during hot weather. Good! The trouble is gaps cause discomfort and noise as train wheels go over the gaps. Seems the gaps were not necessary after all,British railway and host of other Railway network have continuous welded railways which offer smooth less noisy ride. How come continuous welded rails don't buckle in hot weather?

In my views;
1. Gaps are not necessary in cold weather countries
2. In Hot weather countries like tanzania, Gaps are important if the pieces of the railway are merged, But if the Railway is continous and no junctions, hence gaps are not suspected.
3. If you join them using special thermal material then it will be OK.

 

[simplemind]

In my views;
1. Gaps are not necessary in cold weather countries
2. In Hot weather countries like tanzania, Gaps are important if the pieces of the railway are merged, But if the Railway is continous and no junctions, hence gaps are not suspected.
3. If you join them using special thermal material then it will be OK.

TAZARA ni continuous welded rail(cape gauge) haipo nchi za baridi. Explanation yako haitoshelezi.

 

[ub16]

TAZARA ni continuous welded rail(cape gauge) haipo nchi za baridi. Explanation yako haitoshelezi.

Revisit the meaning of 'Cape gauge'

 

[simplemind]

Revisit the meaning of 'Cape gauge'

Simply pointing the fact that Tazara is 1067 width between rails moreover the rail was upgraded to continuous welded rail early 2000.

 

[ymollel]

TAZARA ni continuous welded rail(cape gauge) haipo nchi za baridi. Explanation yako haitoshelezi.

Soma vizuri tena

 

[ub16]

Simply pointing the fact that Tazara is 1067 width between rails moreover the rail was upgraded to continuous welded rail early 2000.

The fact you kept "continuos welded(cape gauge)" in one place as if cape cage is substitute to continuous gauge was wrong, and that was my correction. BTW umesahau kuweka units "1067 width" ndo nini?

 

[simplemind]

The fact you kept "continuos welded(cape gauge)" in one place as if cape cage is substitute to continuous gauge was wrong, and that was my correction. BTW umesahau kuweka units "1067 width" ndo nini?

Cmon we are social media space no rigour required. About units make an intelligent guess.

 

[ub16]

Cmon we are social media space no rigour required. About units make an intelligent guess.

Being on social media doesn't give you an excuse to post incomplete/wrong information, how hard is it to correct that? An intelligent guess? You seem resistant to accept your mistakes, you find ways to go around them by insulting others intelligence... 😂😂😂

 

[simplemind]

Soma vizuri tena

Purpose of post is to challenge us to go beyond established thought/ways of doing things and find novel solution to todays problems. The correct answer is that the rails are pre heated before welding. This will prevent them buckling in hot weather. Nevertheless rails would be in extreme contraction stress during cold weather.

 

[Paul S.S]

Lugha ya malkia wengine inatusumbua ila tuna mipointi ya kufa mtu

 

[simplemind]

Buckled railway image.

 

[CHUAKACHARA]

Lugha ya malkia wengine inatusumbua ila tuna mipointi ya kufa mtu

Iweke kwa kiswahili

 

[CHUAKACHARA]

Physics teacher said expansion gaps in railways are a must to prevents rails from buckling during hot weather. Good! The trouble is gaps cause discomfort and noise as train wheels go over the gaps. Seems the gaps were not necessary after all,British railway and host of other Railway network have continuous welded railways which offer smooth less noisy ride. How come continuous welded rails don't buckle in hot weather?

I am not a mechanical engineer, but can add from my physics knowledge. Suppose the coefficient of linear expansion of some material is quite quite negligible, can this be the reason?

 

[simplemind]

I am not a mechanical engineer, but can add from my physics knowledge. Suppose the coefficient of linear expansion of some material is quite quite negligible, can this be the reason?

Rails are made of steel a material with high coefficient of linear expansion. Reason for continuous weld rails not bulking in hot weather is as stated above ie pre heated to temperature above maximum expected enviroment temperature before welding.

 

[ymollel]

wakuu mnanikumbusha mbaaali sana. duh! coefficient of linear expansion........... nimemmiss teacher wangu wa physics