By modifying the effect between slab planar dimension and load-transfer efficiency to the theoretical slab corner deflection of both in infinite site slab and good bearing conditions,the theoretical slab corner deflection was calculated and compared with field FWD testing data to estimate the void conditions beneath slab corner.

The Theoretical Analysis on Pavement Deflection versus Roadbed Settlement;

Analysis on influencing factors to deflection of slab with cavity;

Analyis of deflection and compressive strain on the surface and the subgrade of flexible pavement;