Can anyone give me an idea of the best way to construct a driveway across the thickest wettest clay in the SW of England? The total length is about 50 meters long by about 4.5 wide. I've had a look on the main site about 150mm of DTpT 1 but even with a layer of Terram down pretty much everything we've used to get heavy site access sinks into the clay.
Thoughts as to the rough quantities of rock/type 1 needed greatly appreciated.
Or just tell me where we went wrong, other than only finding this site 6 months after we started building.
This is the concrete lorry sinking into the 6" rock that was put down
and 10 days later, yes thats a stream running through the middle, we've diverted that now.
You need on-site advice but I'd consider using a geogrid in place of/as well as a geofabric, and I'd probably consider using at least two 150mm layers of capping and/or granular sub-base/
George Stephenson managed it on Chat Moss by throwing down lots of bushes and laying the railway lin eon top. IF it really is deep wet clay, any amount of rock is going to sink. If you use railway sleepers they will float on the top of the mud, even with an HGV on them.
