Hi there. First post. Love the content and tone of posts I read so far.
I'm looking for hints in repairing a leak in piping under the cement walkway, next to the entry stairs to my inground vinyl lined pool. I know it's there beacause I hear a gurgling sound. Those pipes were not used until last week, when I added a solar heater. What I'm looking for is probably not advice for the piping itself, but on how to get there as easily as possible and not breaking anything.
The walkway is already slightly sloped down towards the exterior, but that's the case all around the pool, as a result of poor water and slope management in the yard itself: Not adding soil to the lawn for 25 years, allowing the lawn be lower than the concrete slab, while most neighbours have slightly higher yards. I have fixed the lawn level that in other areas around the pool and have had to "insert" earth under the slab in other areas. I just mean that I expect some void underneath there and the slope is not solely caused by the leak, because those pipes were not used until recently.
The slab is about 4 inches thick, in "sections" of about 6 feet, in the sense every second one of the lines used to properly manage the inevitable cracks have been used. The width of the slab at that point is about 30 inches. I do not think there is any "gravel" left between the concrete and the soil.
How deep should I expect to dig to be able to work underneath there? Will I need to put supports underneath the slab where I work. What should I watchout for?