Here is today's report:
Bridge 1, Broadway
Progress is continuing in many areas – (not easy to photograph!) and the final plate has been removed from the last corroded cross beam, with the usual rivet removal problem. This plate has been taken back to the works as a template for drilling the replacement. Nearly all of the bolts have been fitted to the new bottom flange plates of the downside outer main girder:
The majority, 4
rows wide, pinning 2 flange plates to the flange angles, are just visible in
the distance.
Bridge 5, Little Buckland
On the south
abutment the shuttering has been stripped from pour 2, and stone backfill has
been brought in.
Note the roller which has been used for layered
consolidation of the fill. Back of abutment drainage has been installed and
extended to run around the end of the wing walls (see photo - black pipe emerging centre top).
On the north
abutment some extremely tricky shuttering is almost completed ready for the
next pour (hopefully on Monday). From the photo you can clearly see the
“banana” shape of the concrete that is required, at the rear of the abutment,
to link in with that behind the wing walls.
Even trickier
is the shuttering to the north west wing wall. The original was in brick up to
2m thick and this is to be replaced by mass of concrete with a skin of 225mm thick
facing brickwork, to be built once the concrete has been completed.
The last
two photos don’t really show fully the setting out difficulties that were involved.
The base steps up following the external ground contours, but the top slopes
down following the gradient of the yet to be replaced embankment. The main
complication has been that the wall was due to slope at 1:6 (in accordance with
the original 110 year old drawings), but when the face line was extended to
deck level there was no room for backing concrete to the abutment itself, which
is extremely important. On checking the other 3 wing walls we found that the
slopes varied from 1: 7.5, to 1:11 & 1:13. After many deliberations a slope
of 1:7.5 was settled on as the best outcome (note the 4” x 2” batten attached
to the wall to establish the final 1 :7.5 wall slope- carefully aligned with
the shuttering in the photograph!!). Who said how great the Victorian builders were
????
If the concrete pour does go ahead on Monday, we will report further. If only the 'Bridges to Broadway' appeal had a pound for every click on this blog... over 34.000 hits so far, who would have thought it ! We would have achieved our target then. The share appeal closes on 31st October, not long now.
Would it be possible to add a 'donate' button?
ReplyDeleteNick813
Hi Nick,
DeleteI don't really know how to do that. In fact, if you want to help the bridges, buy some shares. (you can get the prospectus off the main website, with a form at the back, which you send in with your cheque)
This way, you can claim 30% back from HMRC as well.
There is a donate button on the Broadway blog so if you want to go that way, I suggest you use that one. The railway benefits in the end. The Broadway blog has a station appeal, which at the moment has only £130 in it....
Thanks for you offer, which is very much appreciated, whichever way you do it. Many hands make light work!