Here is what we saw:
Bridge 2, Childswickham Road
The gaps beneath all of the
steel bearings have been grouted up and the ballast retaining walls are now completed, as shown on the two photographs below.
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| Looking north, towards Broadway station |
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| Looking south |
Note the thicker looking deck plate ends, indicating the drip strip welded on here. This will cause water to run off this side of the ballast retaining wall, also newly installed. No more water running down underneath the girder and causing it to rust!
The lattice parapet steelwork has been made up and delivered. It is expected to go on later this week.
Bridge 4, Peasebrook Farm
Yesterday, the shuttering to the ends of
the deck were complete, with the end re-bar cages installed:
When the above two pictures were taken, concreting was due to take place early the following morning (12 to 15 Cu. meters expected).
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| All is ready for concrete |
The rebar cages are all in place, and the shuttering has been erected around it. All is ready for the concrete pour.
Because of the size
of the slab it was necessary to transfer the concrete mix in using the excavator bucket, as
can be seen on this photograph:
In this last picture, the concrete is being vibrated in. The Malvern side balustrade is already in place.
Our next report should show the concrete deck in place, and, we hope, the new balustrades at Childswickham Road.
It appears that surface of the new deck will be somewhat higher than that of the old one? (Not an issue, obviously, just curious.)
ReplyDeleteAnd what's the purpose of the steel pipe running from one side to the other, at the mid-point of the span? Cable duct?
Great job on the pictures, etc; good to see this phase of the extension on the home stretch!
Noel
The tube is a temporary scaffold pole, which allows a wooden tamper to be drawn across the wet concrete on to the formwork at each side. It makes sure the correct cover of concrete above the reinforcement is maintained. It allows the concrete pour to be levelled in two halves. The pole is removed on completion of the concrete pour.
DeleteOld Builder!
"Old builder" is quite correct. The extra feature of it in this case is to create a fall on the surface of the deck from the centre down to a lower level at each end to encourage water to drain away rather than lying on the deck waterproofing. WE have included new drainage at the deck ends to carry the water away down the embankments. Thus the scaffold tube gives the extra height needed to form a fall and also acts as a screeding board for levelling purposes.
DeleteThe original drawings that we obtained from Paddington, 30 odd years ago showed app 3" of concrete above the top of the troughing. However when we removed the asphalt waterproofing we found that it was less than 3/4" thick and very poor quality!! The new deck will be roughly the height originally intended plus a bit extra to form the slopes.