How does the temperature vary throughout a tunnel? 2

[bojoka4052]

For example it tends to be colder at the opening, but warmer as we move further in? It would also make sense that the temperature only goes up a little during the summer, and a bit down during the winter months deeper inside the tunnel, compared to right by the opening; where I imagine the temperature would go up and down much more?

Edit: I ask because of joint sealant for concrete, I get too much displacement in the concrete due to rise and decrease in temperature. I am thinking this cannot be realistic numbers (5 mm) deep inside the tunnel. Maybe in reality the temperature is significantly lower.

 

[CrabbyT]

5mm over a large distance doesn't sound that ridiculous. Keep in mind that you're not going to get 5 mm of expansion at a single point. The expansion occurs everywhere. If you're installing a sealant down the entire length of the tunnel (longitudinally), wouldn't the sealant also subject to thermal expansion? Wouldn't it just expand with the tunnel?

Why not just pick a super flexible sealant, or pick a sealant with a similar thermal expansion coefficient compared to rock, and call it a day?

 

[WARose]

Is there any way I could get a look at those calculations or get a how to explanation?

I could post what I did.....but I'm not sure why you would want to see calcs based on a lot of assumptions on my part. As other posters have told you: you haven't defined the problem.