From a typical ground investigation borehole log the tarmac thickness is recorded but no tests have been carried out on the road surfacing or formation level. I'm after an approximate bearing capacity of the road surface, including the contribution of the surface itself and the sub-formation under it.
Obviously heavy vehicles can be resisted, can I take a typical heavy vehicle and assume a minimum bearing capacity from the bearing stress under the vehicle or is there another/better more reliable method?
I can't carry out further insitu tests.