I wanted to get some feedback and/or thoughts on this job. We trenched approx 55' of asphalt in a school parking lot. When digging the trench I noticed a lot of ash and/or rock under the asphalt and I am getting a little worried about how we are going to back fill and make sure we protect our piping. My thoughts are to either:
A. Install a bed of sand on bottom of the trench, lay our pipe (1" PVC Conduit) on the sand and put a layer of either 2b stone or something of the like over it.
B. Was also thinking of running our pipe through RMC to give it extra protection. (overkill? bad idea?)
I just do not want this to be a problem for us down the line if the piping ever gets damaged or crushed. This is not an area that I am well versed in....
PS- Our trench is currently 28" deep so we can put something down and still maintain our minimum 24" depth from top
A. Install a bed of sand on bottom of the trench, lay our pipe (1" PVC Conduit) on the sand and put a layer of either 2b stone or something of the like over it.
B. Was also thinking of running our pipe through RMC to give it extra protection. (overkill? bad idea?)
I just do not want this to be a problem for us down the line if the piping ever gets damaged or crushed. This is not an area that I am well versed in....
PS- Our trench is currently 28" deep so we can put something down and still maintain our minimum 24" depth from top