Amount of care required over salt glaze pipes

[larry]

Hello

 

We have three salt glaze pipes that run under our driveway to the drains. House is approx 100 years old and presume these are original.

I had a CCTV drain survey and the chap said they were in remarkably good condition. No concerns at all. Which was nice!

I'd now like to dig up the driveway and replace with gravel grids on compacted MOT and Terram. I've done this on half the driveway already and really happy with it. But that half hasn't got any pipes under.

 

How careful do I need to be about the pipes under the driveway? We have sandy soil. 

If I wasn't being careful is use an electric compactor etc to do it properly. 

 

Advice greatly received.