How on earth do you get the concrete rings into the house? Through the door?
Edit: I seem to have missed reading your latest posts. You can probably do the drilling yourself. Check with GEA Welltech, they have hand drills and groundwater pipes that you can install to check for water. The drill probably costs 3-4 thousand, but you might be able to sell it on afterward.
Forget the concrete rings! Just a hassle and expensive.
I believe more in digging down 1m or whatever works. Insert the form and pour inside.
Dig below and move the form down. The top "ring" needs something so it doesn't slide down when you dig underneath.
During this winter season, there's almost nothing else to do but brainstorm renovation ideas for the summer.
I am increasingly exploring the idea of casting instead of using ready-made rings. Building molds doesn't seem like a problem, nor does casting. An advantage is also that the space will be rectangular.
As I see it, there will be 3 castings for the walls, all the way around with a height of 1m.
So:
Phase 1:
Drill a test hole to check the groundwater level.
Phase 2:
#Remove the existing floor.
#Break away the existing slab.
#Dig a hole 3.5x3.5 m with a depth of 1m (about 1300 buckets.. :|)
#Attach isodrain to the wall.
#Attach geotextile to the isodrain.
#Build a nice structure of rebar that also extends a bit into the "ground."
#Attach loops at the top of the rebar above the edge.
#Build a mold.
#Cast and vibrate.
Phase 3:
#Remove the mold.
#Suspend the casting in the loops.
#Dig another meter.
#Repeat according to phase 2, but make the mold slightly deeper and higher so that it overlaps the previous casting, this is to fill all the way up.
Phase 4:
#Dig another meter.
#Place large stones at the bottom, and complement with smaller stones.
#Lay isodran on the floor.
#Fold the geotextile on the floor.
#Proceed as in phase 2, but without the rebar extending into the ground.
#Cast the floor.
Phase 5:
#Remove the suspension and loops.
#Frame the walls, and furnish according to preference.
Hello,
I think it will be easier and faster to dig everything out at once. I'm definitely not an expert, but casting "downward" on the walls might be tricky. I think you'll need to cast a slab on the ground and then the walls after that. That way, you can ensure that the isodrän and geotextile are in place as they should be when you refill. Good luck with whatever you choose, it's a really fun project to follow!
Hello,
I think it will be easier and faster to dig everything out at once. I'm definitely not an expert, but "pouring on" the walls downward will probably be tricky. I think you have to pour a slab on the ground and then the walls after that. Then you have control over the isodrän and geotextile to make sure it is where it's supposed to be when you backfill. Good luck with whatever you choose, a really fun project to follow!
It becomes a bit more complicated to dig in stages.
But on the other hand, you probably have to do that anyway, you can't dig everything in one evening.
I don't really know who to turn to in order to assess the "soil pressure."
If I dig everything at once, there are essentially no safety margins, and I don't want to get buried.
A snorkel and breathing hose for digging doesn't seem like an option.
And before I pour the last walls at the bottom, I can obviously pour the floor first, then when I pour the last walls they will stand on the slab at the bottom.
With the idea of only digging 1 meter at a time, I imagine it is considered a safe job, where the soil pressure doesn't really matter, doesn't feel like I even need someone to calculate it.
What I'm really worried about are only two things.
Bedrock and water.
But I plan to check that through one or several test boreholes.
When they build these in England, they build them like a pool, so the groundwater level doesn't matter as much. Sure, I can also play with fiberglass, but that feels significantly more complicated and costly.
Edit: in my image above and in the description, I mixed up the order of the geotextile and isodrain. Of course, the geotextile should be against the ground and not the concrete/walls.
I blame all the New Year's champagne.
Old thread, but I'm posting anyway It should be exactly like digging a well, and I've done that.
Just like someone mentioned, you use concrete rings, the easiest (but perhaps not the fastest) way is to cast them on site. You simply place the first ring, dig around underneath until it's level with the floor, then place the next ring and continue until you've reached the desired depth.
The advantage of rings compared to a square is that the construction becomes much stronger.
If you have a slab on the ground, you should be able to drill into the slab at the edge of the future hole and drill and pile so you get support for the slab..
Yes - I'm considering similar ideas but can't find any direct information on it.
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JanneJanne123 said:
nino said: