aerodriver
Member
I'm beginning a 700 ft driveway that will also be a designated fire access road. I need to be able to support a 40 ton fire truck and my geotech is telling me I need 7-10" of road base on top of a 95% compaction of the subgrade (Had a really crappy R-value come back, and I suspect I can get a better one with a different test).
My question is, how does this sound for the subgrade... I have already scraped off the grass that's been sitting on this land for a long time. I was thinking of getting a crown on the road now, then ripping 12" deep, then coming back and compacting with a pad foot drum. Or, should I be looking at ripping first, compacting, then working on the crown and recompacting? In Northern California right now, we've had a little bit of rain here and there, currently I'm giving it about 1.5 weeks of drying out before trying any of this. It's not all clay, but it's a mix of gravel patches, brown clay, sandy clay and even some hard volcanic type rock structure on this hill.
I'm new at this, and maybe I am wrong in thinking I can do this during the wet season? It's just tempting to try because we are looking at 2 weeks of sunny weather with a little bit of breeze and 60+ degree weather. I need to get a well drilled at the top of this hill that's a 10% grade in about a month and I want to be able to get a rig up there when the time comes.
My question is, how does this sound for the subgrade... I have already scraped off the grass that's been sitting on this land for a long time. I was thinking of getting a crown on the road now, then ripping 12" deep, then coming back and compacting with a pad foot drum. Or, should I be looking at ripping first, compacting, then working on the crown and recompacting? In Northern California right now, we've had a little bit of rain here and there, currently I'm giving it about 1.5 weeks of drying out before trying any of this. It's not all clay, but it's a mix of gravel patches, brown clay, sandy clay and even some hard volcanic type rock structure on this hill.
I'm new at this, and maybe I am wrong in thinking I can do this during the wet season? It's just tempting to try because we are looking at 2 weeks of sunny weather with a little bit of breeze and 60+ degree weather. I need to get a well drilled at the top of this hill that's a 10% grade in about a month and I want to be able to get a rig up there when the time comes.