3 ms·
The vacuum is the problem. With HSR you also have small gaps in the system to allow for expansion but nothing there requires a perfect surface.
by dx034 9y ago
The vacuum is the problem. With HSR you also have small gaps in the system to allow for expansion but nothing there requires a perfect surface.
- GuB-42 9y agoAFAIK, high speed rails do not have gaps. Expansion is controlled by brute force : lots of clamping and massive supports.
- masklinn 9y agoThey can have expansion joints around bridges, but generally speaking you're correct, they're thermite-welded and adjusted to correctly handle thermal stresses without kinking (heat expansion) or fracturing (cold contraction).