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Folkestone-Dover sea wall wash-out


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post-13585-0-41509300-1465804091_thumb.jpeg

 

Yes,it does look to be the start of extra drainage system.

Where the guy is standing against the Seawall, below his feet is on the original outfall.

I will get a set of. Photos today.

There is a large drainage pipe,coming down from the A 20.

The foot subway, from the estate bus stop to the cliff path is always ankle deep,in water

after heavy rains.

Exposing those pile heads,will now I think leave the large crane,on its limits of transferring materials,

If require towards the tunnel mouths.

I wonder if the exposure of the heads is to build reinforcing to attach to raft 1 to raft 2.

What kind of join to raft 1 will there be expansion joint ?

Will the new drain be pre cast of will it be poured ?

Time will tell.

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This morning,arrived 1100 hours.

A walk along the site cliff top path and back up to tunnel top,then on up Suhakey.

The shuttering is under way for the completion of both sides of the raft.

More drill holes and holes to be filled with concrete raft 3and 4.

Delivery of more reinforcing just now offloaded.

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I ve uploaded these photos first,before the main upload to Flickr.

 

from under wher I am standing, a 15in pipe runs down from the A20.

Down though this gully, to the squared off built fence, under the track bed out through the seawall.

 

27611020886_67d0ea8dbf_k.jpgP1440529 by David Todd 2012, on Flickr

 

27610975426_ee350e164a_k.jpgP1440479 by David Todd 2012, on Flickr

 

27367237620_458da49791_k.jpgP1440478 by David Todd 2012, on Flickr

 

27570924581_608b0445ee_k.jpgP1440477 by David Todd 2012, on Flickr

 

27367246120_50cc023e5a_k.jpgP1440476 by David Todd 2012, on Flickr

 

27033730624_16239717d7_k.jpgP1440475 by David Todd 2012, on Flickr

 

27570979771_03dc228c8d_k.jpgP1440554 by David Todd 2012, on Flickr

 

 

 

 

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Looks like the original has several piles drilled through it.    :scratchhead:

 

This is how the new one may look, extending well to seaward,after the new rock armour is applied

Note the new walls either side of the tracks, the rock protection extends well into the elbow below Shakey.

The new foot bridge has been omitted,in this impression.

 

post-13585-0-98644500-1465825656_thumb.jpeg

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Hope you got the jist of Monday morning on site, from the ipad photos.

 

Now for a bit more detail,      calm down, calm down !

 

I have already shewn you the new drainage in a previous post, so onto Raft 1.

 

Shuttering being applied to the seaward side.

Landward side shutter is nearly complete, but is having  another higher level of reinforcing fitted,probably the new wall.

 

The last of the cut re bar is being tied in.

 

27645651335_7191987e6a_k.jpgP1440539 by David Todd 2012, on Flickr

 

27034772294_7ea21e1f57_k.jpgP1440482 by David Todd 2012, on Flickr

 

27546269862_711624c0e4_k.jpgP1440507 by David Todd 2012, on Flickr

 

27035542593_3fc76d618a_k.jpgP1440530 by David Todd 2012, on Flickr

 

27035506583_3144beb804_k.jpgP1440538 by David Todd 2012, on Flickr

 

27645651335_7191987e6a_k.jpgP1440539 by David Todd 2012, on Flickr

 

27611800046_4a620c4194_k.jpgP1440542 by David Todd 2012, on Flickr

 

27611670726_54a7150263_k.jpgP1440552 by David Todd 2012, on Flickr

 

27645551915_c00ec9c4c6_k.jpgP1440561 by David Todd 2012, on Flickr

 

27645533995_d3155cd677_k.jpgP1440562 by David Todd 2012, on Flickr

 

27611572936_18426b7b4a_k.jpgP1440563 by David Todd 2012, on Flickr

 

27545763352_4910657cda_k.jpgP1440567 by David Todd 2012, on Flickr

 

27367603150_daf7f39535_k.jpgP1440568 by David Todd 2012, on Flickr

 

27545721742_1281a7659e_k.jpgP1440569 by David Todd 2012, on Flickr

 

27571481991_a67bb59a7a_k.jpgP1440571 by David Todd 2012, on Flickr

 

27611475026_0ece9d0146_k.jpgP1440576 by David Todd 2012, on Flickr

 

27035277963_43c27355fb_k.jpgP1440579 by David Todd 2012, on Flickr

 

27034114524_4942944aeb_k.jpgP1440583 by David Todd 2012, on Flickr

 

27035217243_97313824a0_k.jpgP1440590 by David Todd 2012, on Flickr

 

27035192853_3c437c0fbc_k.jpgP1440593 by David Todd 2012, on Flickr

 

27615939556_3abe77eb0c_k.jpgP1440603 by David Todd 2012, on Flickr

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As others have said, I hope the seawall can take the amount of weight that's going to be piled against in wet concrete!

But it doesn't seem as if the mass of wet conc. will exert any toppling moment to the wall, it will just be a downward load - and in a few hours the piles will be bearing the load.

That's the magic of concrete.

dh

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The rigs and work further East, rafts 3 & 4,

 

27034317164_7418534cb2_k.jpgP1440549 by David Todd 2012, on Flickr

 

27612219386_caccbabfdc_k.jpgP1440484 by David Todd 2012, on Flickr

 

27035994493_c4afec2d7b_k.jpgP1440487 by David Todd 2012, on Flickr

 

27612072116_bb205e11bb_k.jpgP1440503 by David Todd 2012, on Flickr

 

27034618684_76438a42cc_k.jpgP1440504 by David Todd 2012, on Flickr

 

27546325852_4c6349b288_k.jpgP1440501 by David Todd 2012, on Flickr

 

27546283412_1fdf66a5a4_k.jpgP1440506 by David Todd 2012, on Flickr

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But it doesn't seem as if the mass of wet conc. will exert any toppling moment to the wall, it will just be a downward load - and in a few hours the piles will be bearing the load.

That's the magic of concrete.

dh

 

Although the shuttering on the seaward side will presumably be braced against the wall plus that nit of concrete they put in a few days ago.

 

One think which fascinates me is that there doesn't seem to be going to be very much thickness of concrete on the outer edges of the sides which I would have thought might leave it more readily prone to damage?

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Looks like the original has several piles drilled through it.    :scratchhead:  

 

I'd say the new piles miss the old drain, Tim; if you look at the crack on the seawall, it's in line with a row of piles - but slightly to the west of the drain.

 

My guess is they are excavating the old drain, and will replace on its original alignment (if it indeed needs replacing - although I suspect they will have had a peek up inside the pipe at low tide....)

 

The green markings still have me scratching my head.

 

"Soffit +3.2" makes sense - the soffit of that pipe is 3.2m below the level of the horizontal leg of the innermost green arrows.

 

I suspect the "250" and the vertical lines that the outer green arrows are marking represents 250mm inwards from those particular transverse old rail supports below (marked in red paint).  The significance of this is yet to be revealed...

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