Jacking sidewalk concrete slab

Discussion in 'The Garage' started by 3shot, Oct 10, 2017.

  1. 3shot

    3shot Been here awhile

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    My side walk is dropping, I think a chipmunk has been digging out under neath it. Result it cracked one segment of the walk. I would probably have to raise it almost an inch or so.

    what the best way to go about this?
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  2. Huladog

    Huladog Adventurer

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  3. eakins

    eakins Butler Maps

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    Mud jacking is the term. Some say it does not last vs the cost and you should have a concrete guy hammer out the section, properly compact the soil, then fresh concrete.

    As evidence, I see my city always jacks and replaces dropped concrete sections of side walk. If jacking worked and was cheaper I figure they might invest in that solution for their sidewalks but they do not. Mmm
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  4. eakins

    eakins Butler Maps

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    So mud vs urethan to fill up the void.
    Maybe there is something better with urethan solution? I was told many times over don't bother with mud jacking.
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  5. eakins

    eakins Butler Maps

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  6. Wasser

    Wasser Spilt my beer

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    Check with the city. In my city, if a sidewalk has damage that could be a safety problem, they replace it for free
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  7. Huladog

    Huladog Adventurer

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    In my part of the world the city's not too swift repairing sidewalks and I wouldn't expect them to even know about new techniques to repair stuff!

    Awhile back they touted new fangled asphalt mixes that would last longer, require less patching, etc. and today our roads are still crappy. It's embarrassing, the main thoroughfare right in front of City Hall is potholed and rough.
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  8. eakins

    eakins Butler Maps

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    I hear ya.

    Here they fix things very quickly and upgrade as they do do.
    They might just replace here because it actually costs more. Fort Collins city budget is very robust and they always have $ left over each year & they need to spend it. As such bridges, paths and walk ways are over engineered and beautified. Guess that's why FC was often rated as one of the best places to live in the country...they have taxes coming in to make it so.
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  9. eakins

    eakins Butler Maps

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    I'd start here and see if he gets any traction. Don't call but stop by and talk to a manager and explain that your walk is a safety hazzard.
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  10. 3shot

    3shot Been here awhile

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    Its actually the walk to my front porch from driveway. Its not city owned

    mud jacking is too expensive :-/

    I was thinking on tunneling underneath it and placing a bottle jack under it lifting then bracing..... then somehow pack concrete underneath... but I dont know if that do more damage than good.

    worse case I tear it out and and put a better underlay and redo the sections... ugh.
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  11. shovelstrokeed

    shovelstrokeed Long timer

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    Find the cause, fix it and then renew the finish. Mud and foam are not good underlayment for a sidewalk. You have to spread the load over the largest possible area. That may well mean removing the walkway and trenching the entire area and then fill with appropriate materials. If frost heaving and then settling is a problem, likely in a cold climate, you may need to provide for proper drainage along the entire length as well.
    You really need a soils person and an engineer familiar with the problem to guide you. There are no simple solutions.
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  12. Midnightventure

    Midnightventure -

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    I lifted 2 3ft by 3ft sections that were still together at one end. Had a step on that end too. The step had dropped far enough that stepping up to my porch was hard for an older person. I attached some big c clamps to the side of the slab. Had to dig small holes on each side to do that. Used my two car jacks and a 4x4 to lift the whole thing. Then I poured in some wet concrete and worked it back as far as I could. Probably raised it about 1 1/2" on one end. The 2 sections didn't break in two. It's amazing how much more comfortable the step is just being 1 1/2" closer.
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  13. Project84

    Project84 I can haz adventure?

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    Had my patio raised/leveled to avoid flooding the basement when I bought the house 8.5 years ago.

    I used a "concrete lifting" company that drilled 2" holes and then pumped cement under the patio. Been solid as hell ever since. Highly satisfied!
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  14. eakins

    eakins Butler Maps

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    There are several methods in YouTube

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  15. eakins

    eakins Butler Maps

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    Sounds like just spend all that man's $ in 20 seconds. I'm sure he will get that soil engineer on retainer asap to fix his sidewalk.
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  16. eakins

    eakins Butler Maps

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  17. shovelstrokeed

    shovelstrokeed Long timer

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    Do it right or keep doing it over. I know it can get expensive but I'll wager it will be less than the cost of a lawsuit if someone trips.
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  18. eakins

    eakins Butler Maps

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    I hear ya. Guess it depends on who owns those sidewalks. Each city if different in that right of way.
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  19. shovelstrokeed

    shovelstrokeed Long timer

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    I thought the OP stated it was not a city sidewalk but rather his own path from the border to the house. City regulations would not apply there.
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  20. 3shot

    3shot Been here awhile

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    I thought I mentioned the cause being a chipmunk making a home underneath it, two sections had dropped about an inch or down creating a crack. It is just slab on grade

    Funny I was thinking on idea like this, only using some treated deck boards I have around
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