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Old 05-18-2011, 06:58 AM   #1
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Lifting a sliding concrete slab


So our driveway is 8 concrete slabs approximately 12'x12' (its raining a real "goose drownder" out there so I'm not going out to measure it.)

They sit on a 30 degree slope. One of them is beginning to slide down the hill due to hydraulic subluxation or some other crazy term. Water and ice get under the slab, freeze, lift the slab slightly and away it goes.

Anyway, the slab that is sliding is beginning to push under the one below it.

Anyone ever used hydraulic jacks or cable rigging and turnbuckles to push/lift a slab up a hill?

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Old 05-18-2011, 07:28 AM   #2
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Lifting a sliding concrete slab


curious how long has this driveway been in place ? i'd have the soil checked out 1st,,, you might try a bodacious BIG crowbar, too

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Old 05-18-2011, 08:10 AM   #3
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Lifting a sliding concrete slab


It's like Plate Tectonics on a smaller scale. Watch out for earthquake activity associated with the uplift.
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Old 05-18-2011, 09:50 AM   #4
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Lifting a sliding concrete slab


Driveway has been in place 40 years. Very nice work. The rate of slide has accelerated because the lazy HO did not replace the fiber expansion strips when they rotted out 2 years ago.
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Old 05-21-2011, 09:54 AM   #5
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Lifting a sliding concrete slab


Hydraulic Flange Spreaders? Maybe.

Calculate the weight of the slab, plus the friction of the slab on it's gravel base. Use a grinder and some chisels to get a toe hold, then push up slowly. Chock it with pieces of brick as we go.

Once it's up. Cut some concrete brick to fit. Fill with appropriate sealant?
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