The harbor land area formed by backfilling hill stones(broken bits)is served as the earth base under the pavement of roads and storage yards after dynamic compaction and vibration rolling. At present,the generally adopted rebound modulus is 60 MPa,and on the earth base,the gravel sub-base which is about 200 mm thick is set.Through the engineering project finished in Dalian port to inversely calculate the rebound modulus of earth base,it is considered that the rebound modulus of earth base adopted under the concrete pavement is too low and can be largely improved.According to relevant regulations of the specification,it is not necessary to set sub-base.