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Folkestone-Dover sea wall wash-out


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Setting out and assembly of the rebar.

 

 

 

Looking West.

 

27446473971_46131c1f08_k.jpgP1430555 by David Todd 2012, on Flickr

 

27446477331_d38b7ee50d_k.jpgP1430554 by David Todd 2012, on Flickr

 

 

27483916186_1afdcaef10_k.jpgP1430556 by David Todd 2012, on Flickr

 

26910262003_ea3f7b314e_k.jpgP1430558 by David Todd 2012, on Flickr

 

27445986191_8bd0c6705a_k.jpgP1430560 by David Todd 2012, on Flickr

 

 

27518842575_127c2e5594_k.jpgP1430559 by David Todd 2012, on Flickr

 

 

 

 

 

 

From top of the tunnels.

 

27241810980_29c9190377_k.jpgP1430576 by David Todd 2012, on Flickr

 

27483899816_b87fd4d03f_k.jpgP1430590 by David Todd 2012, on Flickr

 

27446402871_aafc6b7db9_k.jpgP1430577 by David Todd 2012, on Flickr

 

27484262296_ce8802a3ff_k.jpgP1430587 by David Todd 2012, on Flickr

 

27242163520_83c502d9b9_k.jpgP1430588 by David Todd 2012, on Flickr

 

26910600753_bab6b63e2b_k.jpgP1430591 by David Todd 2012, on Flickr

 

27484243766_6a76381c52_k.jpgP1430592 by David Todd 2012, on Flickr

 

27518746115_c2025ee2eb_k.jpgP1430595 by David Todd 2012, on Flickr

 

27242132810_b98d9ddda6_k.jpgP1430596 by David Todd 2012, on Flickr

 

27518724045_3aed6c2c92_k.jpgP1430601 by David Todd 2012, on Flickr

 

26910568793_36f8085523_k.jpgP1430608 by David Todd 2012, on Flickr

 

 

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The site West to East, this morning.

 

26910600753_bab6b63e2b_k.jpgP1430591 by David Todd 2012, on Flickr

 

27484262296_ce8802a3ff_k.jpgP1430587 by David Todd 2012, on Flickr

 

27242171140_9bbb71e3b8_k.jpgP1430586 by David Todd 2012, on Flickr

 

27242175430_7422471c73_k.jpgP1430585 by David Todd 2012, on Flickr

 

27242179450_44783eb61a_k.jpgP1430584 by David Todd 2012, on Flickr

 

26910619493_2dd6adeec0_k.jpgP1430583 by David Todd 2012, on Flickr

 

27242186130_e903430d57_k.jpgP1430582 by David Todd 2012, on Flickr

 

27446385451_2cefa11429_k.jpgP1430581 by David Todd 2012, on Flickr

 

27419880662_eaa1dcef57_k.jpgP1430579 by David Todd 2012, on Flickr

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Red Rig is drilling.

 

27446450801_bd3d54ab3c_k.jpgP1430561 by David Todd 2012, on Flickr

 

27518826315_8b93517e42_k.jpgP1430562 by David Todd 2012, on Flickr

 

 

Yellow rig, close the the lorry that is being unloaded by the large crane.

 

27446416691_7c33c572a4_k.jpgP1430569 by David Todd 2012, on Flickr

 

26909742894_7ad63441df_k.jpgP1430549 by David Todd 2012, on Flickr

 

27419951392_3e3ad94151_k.jpgP1430550 by David Todd 2012, on Flickr

 

27419947282_d5e6b45579_k.jpgP1430551 by David Todd 2012, on Flickr

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After the site visit, a bucket of coffee, with Nigel, outside the White Cliffs hotel on Dover prom, in the morning heat.

 

26909486054_17861079c7_k.jpgP1430636 by David Todd 2012, on Flickr

 

26909469094_becdccfd6d_k.jpgP1430642 by David Todd 2012, on Flickr

 

26909463574_a293aab0b2_k.jpgP1430644 by David Todd 2012, on Flickr

 

27446186451_ed6e91d91a_k.jpgP1430652 by David Todd 2012, on Flickr

 

27419688882_660f00e68b_k.jpgP1430653 by David Todd 2012, on Flickr

 

27518601685_f9418e98f1_k.jpgP1430637 by David Todd 2012, on Flickr

 

27242030500_568f3ea783_k.jpgP1430639 by David Todd 2012, on Flickr

 

27242026930_fde4fad031_k.jpgP1430640 by David Todd 2012, on Flickr

 

27446230301_02c9b721eb_k.jpgP1430641 by David Todd 2012, on Flickr

 

 

The walk back home.

 

27241970560_1feb143e56_k.jpgP1430660 by David Todd 2012, on Flickr

 

 

 

You can now see the castle, now they have demolished the skyscraper.

 

27518548315_3292cb4341_k.jpgP1430661 by David Todd 2012, on Flickr

 

27484060026_afdf84568b_k.jpgP1430663 by David Todd 2012, on Flickr

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  • RMweb Gold

So what are they going to do next? Cast a layer of concrete on the reinforcement they've laid out, then flame cut the tops of the vertical bars flush with the finished surface?

 

The picture at post 2141 suggests to me that the concrete deck of the viaduct will be much thicker than the current depth of rebar and extends several inches (at least) above the top of the rebar poking out of the piles.  So presumably there is a lot more steel to go in before any concrete can be poured as laying it in relatively thin layers would strike me as asking for trouble in years to come.

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So what are they going to do next? Cast a layer of concrete on the reinforcement they've laid out, then flame cut the tops of the vertical bars flush with the finished surface?

 

That first layer of reo is the bottom floor of the reinforcing steel "cage".

 

post-8688-0-79504900-1465345179_thumb.jpg

 

They will tie those "U" bars on each end I mentioned yesterday - and that are in dt's photo below - and then lace another almost identical layer on the top of it - approx. 800mm above - and also, I would imagine, interlaced with the reo poking out from the piles.  There probably will also be "L" shaped steels, "lapped" (inverted, and wired in on those pile caps) to spread the loads - otherwise the piles would just punch through the concrete slab cast on top.

 

I can't find a photo of what I am trying to describe, but the detail on the top right of this drawing is close:

 

post-8688-0-91826800-1465345745_thumb.jpg

 

You can see these are the "hairpins" and the other steel in this photo *could* be the "L" but I am not 100% sure.

 

post-8688-0-66974100-1465345242_thumb.jpg

 

The thing about concrete is that it is brilliant in compression, horrible in tension.  That is why the steel is there - it will take almost all of the tension loads. And that is why it is normally placed only 30-50mm below the outside surface of the concrete - as the outside edges are the ones in tension, not the middle of the slab. Steel in the middle of a concrete beam will have little impact on the strength of a reinforced structure.

 

I agree with The Stationmaster - don't think the steel poking out the piles will be cut - the concrete is likely to be 50mm higher when finished than the tips of those bars.  I'd also be surprised if they bend the bars on site - it's a pain in the rear (they are probably ~20mm dia, and quite stiff!) , and impossible to do with any finesse on site.  They *could* just splay them out, but lapping with elbows is more likely in my experience.

 

Cheers

 

Scott

Edited by jukebox
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Leaving the edges clear(Ish) may help with safe access, but I wonder if precast edge sections will be craned in before the pour. As well as a quicker/neater edge, it would act as the  side shuttering.

 

Thanks

 

Dave

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I agree, the steel height out of the piles is there for a reason.

I did think at one stage, once the mesh had been established, that steel I beams may have been fitted between the pile head's,

But am doubting this now.

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Today's visit, was from 1130 to 1400 hours, a hot day,with zephyr's.

 

I have again chosen a few photo's,before I upload the bulk of camera photos,to Flickr.

 

The progress of  building the reinforcing for Raft 1.

 

26932520184_8dde31711f_k.jpgP1430698 by David Todd 2012, on Flickr

 

27469740511_f68af1604f_k.jpgP1430703 by David Todd 2012, on Flickr

 

27265363820_f42ee16b10_k.jpgP1430705 by David Todd 2012, on Flickr

 

27443043612_54bb5a95c9_k.jpgP1430757 by David Todd 2012, on Flickr

 

27541955765_c0883312dc_k.jpgP1430770 by David Todd 2012, on Flickr

 

27265261650_b46a2c9a2f_k.jpgP1430771 by David Todd 2012, on Flickr

 

27265236440_084fdf97c9_k.jpgP1430772 by David Todd 2012, on Flickr

 

27541893555_9b34ebc7a8_k.jpgP1430774 by David Todd 2012, on Flickr

 

27265189960_befba98cb8_k.jpgP1430776 by David Todd 2012, on Flickr

 

26932288954_1b3b9fe200_k.jpgP1430783 by David Todd 2012, on Flickr

 

27507158896_6ca64b0f5c_k.jpgP1430792 by David Todd 2012, on Flickr

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Morning,

 

There may not be any photos next Sunday, as I will be at Chatham Model Railway Exhibition for the day.

 

I will take a trip up the site late this morning,when low cloud and mist have burnt back.

 

Yesterday, I reset my camera,back to factory setting s, this may have had the effect of a very slow upload to Flickr,

Taking two minutes per picture, with 250 to upload. Previously it would be less than 5 seconds per picture.

 

Looking at the progress of the reinforcing , I agree with Jukeboxs post and diagrams,

 

The front of the raft has its U pieces fitted, the landward side has most U s fitted, as I left yesterday,

a lot of U s were being fitted to the seaward side.

 

Initially, the spacers at ground level to set out, thought to be wood then metal,they do turn out to be plastic,

noted by the way the crew were picking them up and throwing them around.

 

The concrete pour crew, were at a bit of a loss yesterday, the remaining pile heads had been uncovered,

set concrete removed,

But, the stone to cover the surrounding surfaces had not been laid nor compacted,this could have been due to the

large crane,sitting at the end of Raft 2, feeding steels to the reinforcing crew.

The site was tight for traffic flow yesterday, two rigs drilling,two other cranes working, mixers in and out filling

drilled holes,diggers and tippers,removing waste spoil, none of these seemed to be available for the

concrete pour crew,to finish the pour for raft 1.

I will see if it has been done overnight,when I visit later.

 

If you look at the last two photos I posted, you will see, "the wall" is having angled wood shuttering made up.

Also, it is lined up with Raft 1 to be tied in with the U pieces and the old rail connecting the wooden trestle to the old Seawall.

 

A spoil train has arrived at Dover Priory this morning,six minutes early.

 

Predicted date for having normal passenger trains running, is 25/09/16.

Edited by David Todd
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They're certainly cracking on with that raft. Thanks for the updates David

 

Jamie

As you live/view at a distance,why not pack your saddlebags and pedal down for a couple of days for on site viewing.

They will not have finished the project, by the time you get here.

 

Am sure Jukebox would like a 24 hour visit, but, at present, there are no online cheap,

Day Return Tickets, available from Australia.

Edited by David Todd
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When I left, yesterday.

 

 

P1430926 by David Todd 2012, on Flickr

 

The rebar covered area seems to extend much further beyond the piles on the seaward side than on the landward side -  wonder why although maybe it is to make room for the 'splash barrier' wall on the seaward side?

 

No doubt the Russian ship was looking after their (Kilo Class?) submarine - afraid someone might pinch it?

Edited by The Stationmaster
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The rebar covered area seems to extend much further beyond the piles on the seaward side than on the landward side -  wonder why although maybe it is to make room for the 'splash barrier' wall on the seaward side?

 

No doubt the Russian ship was looking after their submarine - afraid someone might pinch it?

 

Obviously there to pick up any would be defectors on the way past, old habit die hard.

 

Dave, I would love to come and spend a few days there.  Unfortunately the ayatollah has me fully engaged in packing for a trip to France via Bournemouth and Portsmouth and divorces can be expensive.   My main concern at the moment is how to secrete various modelling items in the trailer tomorrow.

 

Jamie

Edited by jamie92208
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Maybe,up at the site today at 1300 hours, cloud burnt back,is not due until 1500 hours..

 

Some photos,of the site yesterday, from the delayed upload.

 

By the time another layer of reinforcing is set on top of what you see now,then the concrete poured it's level will then be at a point,

where ballast is placed, making it level with the original trackwork at the tunnel mouth's.

 

27443888082_5d9968c2a9_k.jpgP1430937 by David Todd 2012, on Flickr

 

27271092260_bf68b7089e_k.jpgP1430708 by David Todd 2012, on Flickr

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