New water main in drive

[marsaday]

I have a concrete drive and i want to do block paving in the next few yrs.

At the moment i will be renewing the lead water pipe which runs 10m up the drive from the pavement.

So i need to dig out the concrete and muck to 750mm minimum.

When i come to fill the trench back in do i use pea gravel considering i will be redoing the drive in the future. I was thinking of filling with pea gravel up to approx 40mm and then filling the rest of the trench with hardcore.

I understand this is fine for the pipe, but what about the future foundation for a new block pave drive ?

Also do you think i can just bar by way through the concrete to create this trench. It does run very close to the edge of the drive. Normally i think you would cut the concrete with a stone cutter and renew with freah concrete, but i am not bothered about the final finish because it will all come up in the future.

 

[noseall]

We have backfilled with sand immediately around the pipe then run warning tape over the top, but pea gravel works well especially when restrained in a trench.

If you plan on running the new water main through the concrete drive and have no other options, then breaking along the edge seems sensible.

 

[marsaday]

Ok. Thanks for this.

Will the gravel be ok, but still need 6"of hardcore on top for when i come to do the new driveway ?