Actually, the greatest strain on the pavement is when turning. The 747 inner bogies steer, as does the aft axle on each bogie on the 777 but there is still a great stress caused as an a/c lines up or vacates.
Also, it's not just a simple matter of mass divided by number of wheels; there's the actual footprint of each tyre to be taken into account, wheel size, tyre pressure and so on. All International airports are required to publish their pavement strengths and the a/c mass that they can support, but I can't find the data for Orly. (LGW is in the UK AIP, PCN 78)
Here's some useful background reading material from the FAA:
Pavement Classification Number (PCN) paper
Cheers,
The Odd One