According to the standard when calculating the thickness of the concrete slab, the value is 400mm in the container yard in berth No. 6 & berth No.7 of Dayaowan port area of Dalian port. But in the practical project, it was only 200 mm. The reach stacker was not allowed to work here by the original design. However, the concrete slab was not damaged after a lengthy operation of the reach stacker virtually. Different pavement designs were compared by calculations and the conclusion was that the reason why the thickness of slab was overlarge was that the modulus of resilience of earth subgrade adopted under the rigid pavement was too small.