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  1. #381
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Quote Originally Posted by john1 View Post
    Looks good stuff Rs but dont think it's what you need.

    As you say yours is outward pressure,is it on two sides of a corner?
    The cracks are approximately where I've added them to this picture but the right one is a bit in more than I've drawn, about 4-6" in from the actual inside corner:

    Pond repair.png
    Last edited by RS2OOO; 19-09-2019 at 08:25 PM.

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  3. #382
    Extreme Koi Member Rank = Supreme Champion Frimley Koi keeper's Avatar
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    You're welcome RS

    PM me if you want a hand OK

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  5. #383
    hi RS

    third time lucky,

    what at is the size of the collar/
    is it below ground level like mine
    if not the any weak points in the concrete the pressure on that will me emence

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  7. #384
    Quote Originally Posted by RS2OOO View Post
    The cracks are approximately where I've added them to this picture:

    Pond repair.png
    I just hope the poles hold bud I'm not convinced myself it's only a tube holding it back I thought it would just cut through the soil with that weight on it? I hope I'm missing something and it fixes your problem

    Sent from my HTC U11 using Tapatalk

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  9. #385
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Quote Originally Posted by gravesendkoi View Post
    Hi RS 2OOO,

    to be honest with with regards to the Helicix YouTube video I think your right it seems only for brick work although the do mention stonework which I think you can exclude concrete. If I can be of any assistance with anything if your going to get a group together then by all means give me a shout to lean a helping hand. To be honest if I were in your shoes I would get it done sooner rather than later. Could you drop your water level to just below the concrete collar?

    to be honest if I were you I would replace the length of the collar. Thoughts anybody

    Thanks for the kind offer. Hopefully I'll cope alone, but very good to know nearby help is available if things get tough.

    Think you are right, the repair that feels most comfortable would be to knock out the collar, well, preferably just a section of the collar, and rebuild, tying the new section in with the existing. Only problem is that its a 2 day job and I don't have 2 consecutive days off between now and my holiday. When I come back its gonna be bloody freezing cold so I'll then want to put it off till next spring.

    I'm moving onto nights tomorrow, which means I'm home tomorrow day, so that's my best chance to get something done.

    Any repair has to be done with the sleepers kept in situ. This complicates the repair, but the sleepers are re-barred through that concrete collar and deep into the ground. Had to sledge hammer the rebar through and it took around 15 mins for each piece. Only way to get it back out is to burn the sleepers in situ.

    Oh, can't lower water level long term now I've got a gravity fed drum.

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  11. #386
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Quote Originally Posted by Stuffyrat View Post
    I just hope the poles hold bud I'm not convinced myself it's only a tube holding it back I thought it would just cut through the soil with that weight on it? I hope I'm missing something and it fixes your problem

    Sent from my HTC U11 using Tapatalk
    Another option is to postcrete them in, but don't want to go down that road as it becomes too permanent for what might only reliably be a temporary repair.

    The builder I spoke to is convinced the helifix kit will work as he's used it on structures carrying heavy roofs which he says push the brickwork outwards.

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  13. #387
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Maybe another easy idea would be to follow the same principle as the helifix kit.

    Grind out a long chunk of concrete across the crack, half fill it with resin, then push rebar into it horizontally, top up with resin, then fill back in with mortar and make good.

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  15. #388
    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    Quote Originally Posted by RS2OOO View Post
    The cracks are approximately where I've added them to this picture but the right one is a bit in more than I've drawn, about 4-6" in from the actual inside corner:

    Pond repair.png

    Where it says " box section " and " concrete collar" that side will be weak now and try to move outwards so maybe need some scaffold near that corner for strength.
    John

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  17. #389
    Quote Originally Posted by RS2OOO View Post
    Thanks for the kind offer. Hopefully I'll cope alone, but very good to know nearby help is available if things get tough.

    Think you are right, the repair that feels most comfortable would be to knock out the collar, well, preferably just a section of the collar, and rebuild, tying the new section in with the existing. Only problem is that its a 2 day job and I don't have 2 consecutive days off between now and my holiday. When I come back its gonna be bloody freezing cold so I'll then want to put it off till next spring.

    I'm moving onto nights tomorrow, which means I'm home tomorrow day, so that's my best chance to get something done.

    Any repair has to be done with the sleepers kept in situ. This complicates the repair, but the sleepers are re-barred through that concrete collar and deep into the ground. Had to sledge hammer the rebar through and it took around 15 mins for each piece. Only way to get it back out is to burn the sleepers in situ.

    Oh, can't lower water level long term now I've got a gravity fed drum.
    Honestly bud I would seriously consider the bottle jack idea, dig a good size hole infront of the damaged edge fill it with concrete and rubble when you have a solid base to work from insert the bottle jack and jack it back into place then fill with concrete , atleast it will be pushing a plug of concrete down and away into soil, if you get me, I really think it would work , I know a similar method is sometimes used to stop subsidence in buildings

    Sent from my HTC U11 using Tapatalk

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  19. #390
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Quote Originally Posted by gravesendkoi View Post
    hi RS

    third time lucky,

    what at is the size of the collar/
    is it below ground level like mine
    if not the any weak points in the concrete the pressure on that will me emence
    At that location I'd say its about 4" below ground and 8" above ground.

    Some build pics:


    IMG_20190216_165200.jpgIMG-20190224-WA0002.jpgIMG_20190225_170339.jpgIMG_20190302_170734.jpg
    Last edited by RS2OOO; 19-09-2019 at 08:49 PM.

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  21. #391
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Quote Originally Posted by Stuffyrat View Post
    Honestly bud I would seriously consider the bottle jack idea, dig a good size hole infront of the damaged edge fill it with concrete and rubble when you have a solid base to work from insert the bottle jack and jack it back into place then fill with concrete , atleast it will be pushing a plug of concrete down and away into soil, if you get me, I really think it would work , I know a similar method is sometimes used to stop subsidence in buildings

    Sent from my HTC U11 using Tapatalk
    I think the idea would work as you say, but I also think in the time it would take (need to lower pond level to dig hole, then wait 24-48 hours for concrete to set), I'd be better off doing the cut and shut repair, which also avoids digging another hole in the garden.

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  23. #392
    Quote Originally Posted by RS2OOO View Post
    At that location I'd say its about 4" below ground and 8" above ground.

    Some build pics:


    IMG_20190216_165200.jpgIMG-20190224-WA0002.jpgIMG_20190225_170339.jpg
    To be honest with you RS you may not have enough below ground level. But I am not a builder, it is just a comment. Also you may not of compacted the concrete in that particular area and maybe got trapped air where the crack is. The width of the collar could be a concern too

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  25. #393
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Quote Originally Posted by gravesendkoi View Post
    To be honest with you RS you may not have enough below ground level. But I am not a builder, it is just a comment. Also you may not of compacted the concrete in that particular area and maybe got trapped air where the crack is. The width of the collar could be a concern too
    You are right about the trapped air.... Obviously never noticed it till now, but look in the far left corner on the 3rd pic you quoted and you can see gaps and they are almost exactly where the crack is.

    There is a lot of hardcore in there so that had the potential to allow for air gaps.

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  27. #394
    Extreme Koi Member Rank = Adult Champion bowsaw's Avatar
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    Quote Originally Posted by Stuffyrat View Post
    Honestly bud I would seriously consider the bottle jack idea, dig a good size hole infront of the damaged edge fill it with concrete and rubble when you have a solid base to work from insert the bottle jack and jack it back into place then fill with concrete , atleast it will be pushing a plug of concrete down and away into soil, if you get me, I really think it would work , I know a similar method is sometimes used to stop subsidence in buildings

    Sent from my HTC U11 using Tapatalk
    that's not far off what they do to your house or the leaning tower of Pisa

    https://www.helifix.co.uk/blog/how-t...iding-property
    the slow pond build thread

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  29. #395
    Extreme Koi Member Rank = Adult Champion bowsaw's Avatar
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    is this the forever pond? or does this spur on pond number xyz on the road to the forever pond?
    the slow pond build thread

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  31. #396
    https://www.diy.com/departments/u-ca...SABEgL4WfD_BwE

    Can you not cut out the damaged part of the collar and use a couple of tubs of this in with concrete mix.
    This is quick setting agent which may or may not set the concrete quicker

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  33. #397
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Quote Originally Posted by bowsaw View Post
    is this the forever pond? or does this spur on pond number xyz on the road to the forever pond?
    Don't intend on living here much beyond when the fixed rate mortgage expires in 4 years.

    Sent from my Pixel 2 using Tapatalk

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  35. #398
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Quote Originally Posted by gravesendkoi View Post
    https://www.diy.com/departments/u-ca...SABEgL4WfD_BwE

    Can you not cut out the damaged part of the collar and use a couple of tubs of this in with concrete mix.
    This is quick setting agent which may or may not set the concrete quicker
    Yep, that would be ideal, exactly the type of thing I've been searching for.

    Been worrying myself silly over this. Things like this bother the hell out of me until they are permanently sorted.... Even my mum said I should call in sick for a couple of days to get it sorted, but that's just not me.

    Don't have a concrete cutting grinder otherwise I'd try and get the whole job done tomorrow prior to night shift.

    Sent from my Pixel 2 using Tapatalk

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  37. #399
    There must be a agent that you can put in with the concrete to set it quicker? Have you spoke to a concrete mixing company to ask. Then maybe with a few of us we may be able to knock this out in a day. Although I must admit I am tied up this weekend, so it will have to be next weekend, if I can help out.

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  39. #400
    Cando hire in Northfleet. Must be only no more than a tenner to hire?

    wow my bad

    Can-Do Hire - Grinding Cutting
    Last edited by gravesendkoi; 19-09-2019 at 09:45 PM.

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