Compaction pipe backfill

[martysmarty]

Evening all.

Im laying a new pipe run under my kitchen floor for a sink and dishwasher. Old clay has been removed. And was badly cracked!

Heres the issue.

I only have 100mm of backfill coverage at the top of my run over my 110mm pipe. This is because we have dug the kitchen floor up and lowered the ground subsoil for a new concrete pad further down to accept insulation and screed. This puts the pipe at risk using a whacker plate..

Im thinking i should hand tamp this with a metal stomper i have and take it easy. Theres 100mm concrete, 100mm celotex and 50-60mm screed going over it. This will take it to a depth of 350/360mm

So far i have hand compacted the 10mm shingle pipe bedding and built it up in layers. Do you think i should stick to doing this and only whacker plate other areas away from the pipe run if needed?

Simply put i dont have the invert depth at my lower end to be able to change it. Im keeping it at 1:40

 

[Ian H]

I’d be careful over the pipe but overly concerned.

 

[martysmarty]

Evening ian.

Ok, il take it easy then. Il stick to hand compacting with the stomper and use the whacker where its really needed. I suppose the fact its shallow means it wont need much anyway as long as its done carefully in layers