teuchter
je suis teuchter
Here's my guess:
The current station has 9 terminating platforms and 6 through. The new station will have 6 terminating and 6 through. Therefore, the first platforms to close will be the middle three. They'll demolish them right down to 'basement' level, then build the new bridge over to carry the tracks right through (this will join up with the new viaduct that expands the westbound capacity, if I understand things right). Access to the platforms will continue to be from above via the bridge.
Then they'll carry on closing, demolishing and rebuilding the other platform sections in groups of three/four. During all this time, access will be from above. Only when all the new bridges are in place will they start constructing the new concourse underneath them.
Yes, that seems most likely.
So the new station will have fewer platforms than now? I thought the idea was to convert some of the terminating ones into through ones?