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How do I pour a concrete slab between other slabs and add an anchor to the new slab? Answered

I have a space out the front of my house that I want to turn into a chain anchoring spot for my husband's scooter. I've included a photo of the spot for reference's sake (I really need to clean it out and excavate >.<)

Most of the area is already concreted in but there's a space about six feet by three feet under the kitchen window that I want to fill in. I watched a few videos on how to do it and the information given was great but it showed how to pour new slabs in areas that aren't already concreted so now I turn to you guys.

I also, as part of the slab, want to install a heavy duty anchoring point for the scooter that can't easily be pulled from the ground and will take a heavy duty steel chain through it.

Any advice?


The proper way that is allowed and approved by building codes (Im an Architect btw) is to use an impact drill, and drill 6" (1/2" dia) into the existing slab at 18" o/c. Fill hole with Simspon SET epoxy, and insert #3 (3/8"dia) rebar that is 12" long into the hole. It will extend out 6". Let the Epoxy set, and then pour your new slab.


6 years ago

Presuming you want the new concrete to blend in with the existing concrete:
Excavate the area to a depth of 12" or so. (You may hit the house footing but that's fine, just dig around it.)
Add about 6" of ABC (aggregate base course) or pea gravel.
Install expansion joint material on the edges of the existing concrete and the wall.
Pour in the concrete mix and float it to match the level of the surrounding concrete.
Push a large U-Bolt with the nuts attached into the wet concrete and work it so there are no voids around the U-Bolt. (Use a large galvanized or SS bolt with a 1/2" shank and legs long enough to embed about 5" into the concrete and enough exposed to slip a chain or padlock shackle through. See the attached drawing.)
Finish tooling the concrete with a coarse bristle brush or broom to match the existing concrete.
In a week or so, you will have a very secure anchor to lock the scooter to.

'U' bolt.png

I once needed to "secure" a saddle in a remote barn. I poured about 300 lbs of conc. in a hole in the barn and embedded some reinforcement bars in it then buried a thick, hardened steel chain hooked thru the reinf. I could loop the chain thru the saddle and snap a big honkin lock on it and it stayed after that. The problem using an eyebolt is that it is not hardened and can be opened with a few hits with a hammer.

excavate the hole, about 12 inches deep. Add rebar to strengthen the concrete set the eye bolt in the ground at the right level and fill with concrete.

You could make the eye bolt with some rebar but will need to heat it to bend it.

PS nothing is truly secure.

Thanks for the reply. I know nothing is truly secure but we're planning on putting the eyebolt in, adding an alarm and an immobiliser to the scooter and CCTV around that section out the front...the bike got stolen then recovered and other half wants a motorcycle now, so the scooter will be mine when it gets repaired, so I want to go a bit overboard.