Picture is similar to my situation.
I have a old house and long ago someone cut a hole in the floor of my basement. It is about 10 feet long, 2 feet wide and the hole is 12 to 15 inches deep - varies slightly in width and depth - not squared up. They then lined the entire thing with about an inch thick of mortar over hardware cloth. It is dry even during hurricanes, so not a sump. Don't know what it is. They covered it with a wooden platform. Shit I'm sick of it and want to put the floor back like it was originally. The hole wasn't cut with a saw, but some hand tools, so I trimmed the edges square with a concrete saw. But now what do I do? Do I fill it with gravel? Don't want to cart all that gravel. I'm thinking concrete blocks and some kind of metal screen stuff maybe somehow. Help me Concrete Masters!
>The hole wasn't cut with a saw
Turkish paw for some turkish bogs.
Fill with gravel and tamp down to make it hold weight. 1cu yd of gravel isn't that much for an able bodied person to move. If you insist on being lazy build a small chute through a basement window and shovel it down. If you want a concrete pad on top leave 3" between gravel and top of existing basement slab. Install asphalt expansion joint around edges of new pad before pouring or cut an expansion/control joint in your new slab section so that when it eventually cracks it won't look like crap. If you're too lazy to do it properly don't bother, concrete work isn't difficult just gotta use your back.
I'm thinking that some mortared-in cinder block would help since I'm not sure how strong the "walls" of my pit are. Don't want the gravel bowing the sides of the pit out.
When I get to within 3 inches I' thinking a layer of plastic sheeting and concrete wire mesh. Am I missing anything? I'm thinking rebar is overkill.
The main sewer line runs through my front yard. I've got a man hole in my front yard. Looks ridiculous. Like I said, I live in an old house. They did some crazy stuff back in the old days.
fill it with rubble to take up some of the volume so you're not spending money on a large amount of concrete, you'll be able to get some for free from someone who's demolishing something then pour concrete over the top.
or if you don't mind spending a bit more you could use concrete blocks or bricks.
fill hole with crushed stone
drill a few holes in the vertical face around the perimeter of the knockout
place rebar dowels in the hole so they hang out about 6"
(epoxy them if in place you wanna get fancy)
top with 4" of rete
trowel to finish
Just put some polythene down at the bottom so the damp cant get through the floor, then fill with hardcore (broken bricks or any old rubble, bash that shit down) then lay 6" of concrete
wet the concrete before you lay so you dont get cracks around the edges.
Some good advice here. The area around that rebar looks like the footing. I'd put a temporary form board along the side of the footing and pour that area full. The rest of the trench can be filled with rubble, gravel and then poured with a slab 4" or 6" deep
buy a few bags of pre mix and follow the instructions on the bag.
Wheel barrel, shovel, some water.
hell, you can even use a block of wood as a trowel.
use 3/8 or 1/2 rebar for the dowels, rent an sds+ hammer drill and appropriate size bit
a few buckets of aggregate from a landscaping yard or an empty building lot to fill the hole
soak the perimeter of the hole in the floor so the new concrete bonds better, or use a bonding agent if you wanna get crazy about it (bonding agent is just sealer. Concrete cures better when it remains wet, and cured concrete tends to wick moisture away from wet concrete)
honestly it's pretty easy job, basically foolproof.
Just get some fill gravel or broken concrete block, fill it to about 8 inches, cover with hardware cloth or screen, and finish the top with concrete. Also, if there are any relief joints on the concrete, be sure to follow them on the top concrete, it'll save you a lot of heartache in the future.
>Picture is similar to my situation.
Why can no one ever post a picture of their actual project?
You want to fill it with something that doesn't wick moisture up to your floor! So no crushed concrete or bvricks, there will be capillary action... Proper kind of gravel, taht is. Don't know the correct term in english though, no dictionary knows the word "kapillaarikatko" :D
The SDS drill + bit is way longer than the width of the hole, so the rebar is going to have to go in at an angle (parallel to the surface. but at an angle otherwise). I guess that is better than nothing.
Thanks all for the tips anons.
Keep digging anon maybe you'll find something neat. I did once when I was burying my dog. Found what appeared to be a thigh bone. I don't know enough to tell if it was human, bird, or other mammal. I decided that was deep enough, threw it back in, a bit of dirt, dog coffin, and then filled the hole. Did I find somebody's lunch?, did I find a murdered infant? did I find a dead baby from a native american or early settler? was it somebody else's dog?, I'll never know.
Put ten centimeters of sandgravel, fill up with rubble/stones/gravel, pour 2/3 sand/cement into the cracks between the rubble/stones (wet them a bit first), once it gets hard get 1/3 sand/cement over it and level it with the floor.
My bro just bought a 10ft x 4ft x 3/16" thick sheet of cold rolled steel for under 200 bucks.
OP could lay a similar sheet over the hole and be good to go, drilling and bolting it in place if desired.
BTW the easy way to handle those is to use visegrips. We tightened the knobs with another pair of visegrips to prevent slippage. In our case he was using the sheet to spread the load of a large metal lathe over his wooden floor.