Advice on foundations clay and solid rock

[FresnoBob]

Hi everyone, I hope you’re all well. I have a quick question. I’ve started digging foundations for a part-brick conservatory around 4.7m x 3m. Because it’s solid clay all the way down, I’ve continued digging down to around 1m depth and appear to now be at solid rock, some of which is slightly over and some slightly under 1m depth. See attached photo.

I was planning on getting it trench filled with ready mix concrete. I was wondering whether I need to “even up” the rock with hardcore or anything, or whether it should be poured in directly

as is.

All advice gratefully received.

 

[^woody^]

Is it solid rock or just a lot of rocks which are solid?

If it is solid rock you can just concrete and build right off it, it ain't going anywhere his era

 

[FresnoBob]

Is it solid rock or just a lot of rocks which are solid?

If it is solid rock you can just concrete and build right off it, it ain't going anywhere his era

Cheers Woody. I removed all the loose rocks and have removed any remaining clay using a garden trowel and it does indeed appear to be one massive piece of rock.

 

[FresnoBob]

Is it solid rock or just a lot of rocks which are solid?

If it is solid rock you can just concrete and build right off it, it ain't going anywhere his era

Sorry to bother you again Woody (and everyone), on further investigation, there’s a difference of 20-30cm in places (so in some places the depth is 110, others 80-90) and it’s very lumpy. Is this likely to cause any sort of stress cracks, or is it too thick to have to worry about that?

 

[Dereekoo]

Noting to worry about its just mass concrete infill