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CplDevilDog 05-18-2011 06:58 AM

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.:no:)

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?

stadry 05-18-2011 07:28 AM

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 :laughing:

Ron6519 05-18-2011 08:10 AM

It's like Plate Tectonics on a smaller scale. Watch out for earthquake activity associated with the uplift.

CplDevilDog 05-18-2011 09:50 AM

Driveway has been in place 40 years. Very nice work. The rate of slide has accelerated because the lazy HO :furious: did not replace the fiber expansion strips when they rotted out 2 years ago.

CplDevilDog 05-21-2011 09:54 AM

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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