4 ms·
No. Read the pylon section. What it says is that the tube is NOT constrained in the longitudinal direction on the pylons; it's free to slide back and forth in t
by rossjudson 13y ago
No. Read the pylon section. What it says is that the tube is NOT constrained in the longitudinal direction on the pylons; it's free to slide back and forth in the direction of travel. It's only constrained vertically and laterally.
- 6ren 13y agoThanks, yes, he's clearer in the technical section, p.28. (I hadn't read the whole thing.) 4.2.3. Pylons and Tunnels The tube will be supported by pillars which constrain the tube in the vertical direction but allow longitudinal slip for thermal expansion as well as dampened lateral slip to reduce the risk posed by earthquakes. The "longitudinal slip" is what I assumed/guessed with "rollers or similar" (in my comment above).