on Saturday but another glorious (if a bit cold) Sunday. Bus replacement service was in operation again so I expected work on the new junction would be continuing. The concrete edging work was almost complete on the viaduct. Quite a lot of construction workers were in evidence on the last sections to be installed. Two cranes were working and while I was there a gantry of some sort was lowered into place. The higher ground has now been cleared of of plant and equipment and the site huts have gone. There is an air of winding down on that side of the construction site.
First picture shows the edging work going on on the last two sections to be installed. And no, if you were wondering, that construction worker wasn't being lowered in by crane. It is just an optical illusion!
The area in front was completely cleared of vegetation last winter. This is where the new settlement ponds will be constructed. However the power of nature is such that it has completely grown over again.
Leaves have all gone so you can compare this shot to the original artist's impression on the Network Rail website to see if they got it right.
Here is the gantry being installed. Not an overhead gantry because it is too low and too far out. Has climbing footholds on the outside.
Looking back towards the scrapyard.
This shows the viaduct sweeping round over the main line. The appearance is softened by the completion of the concrete edging. This was taken from the Icknield Way at the Letchworth end.
And zooming in from the same spot.
Looking from the entrance to the temporary quarry, work is continuing all along this section.Here a dumper truck is going up the temporary ramp onto the embankment.
Work continues on the overheads on the road bridge. You can also see the recently installed permanent access staircase up to the junction. Notice how it is offset into four separate sections presumably for health and safety reasons. This will be for ongoing maintenance access.
Finally a mini work site has sprung up half way along the embankment. From what I could see this looks like drainage work as there appeared to be large sections of concrete pipe stored on the ground. Sorry that these shots are a bit far away from the work but you can't get very close from this side without trespassing.
Still no sign of any points fitted to the down Cambridge line yet (though buses replace train again next weekend so they may go in then). When passing on the train towards Hitchin I couldn't tell what works had been done at the Letchworth end over the weekend.
ReplyDeleteAnother good set of pictures. Thanks for keeping us up to date. I am interested in the fact that a point is going in at the eastern end of the chord where it meets the Cambridge down road - why is it needed? I thought the section of line from Hitchin junction eastwards would be removed as unnecessary because, after all, the viaduct is being built to eradicate movement conflicts across the ECML.
ReplyDeleteThe existing down line is being retained.
DeletePresumably it would allow some flexibility so a fast Cambridge service could overtake a stopper or frieght train held on the flyover loop (or vv). I believe some heavy freight trains would always still use the flat junction due to the gradient on the flyover.
Thanks for keeping an eye out! There were a lot of workers on site but the focus seemed to be on the overheads. As you say maybe next weekend! It is also correct that the existing down is being retained for heavy freight trains but these will be at off peak times so as not to undermine the main reason for constructing the new line. And as we said before, so that maintenance can be carried out on the viaduct.
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