Depending on the one foundation treatment engineering in Qinzhou port,we detected the treatment effect of 15000 kN?m energy-level dynamic compaction replacement method on soft foundation based on some tests.The tests are multi-channel transient surface wave test before and after dynamic replacement,dynamic penetration test and bottom condition of replacement piers and static load test after dynamic replacement.Some conclusions have been drawn.Firstly,the bearing capacity of foundation was improved after dynamic replacement.The bearing capacity was larger than 200 kPa with compression modulus larger than 20 MPa.Secondly,the effective reinforcement depth of 15 000 kN?m energy-level dynamic replacement was about 7.0 m to 10.0 m and average effective reinforcement depth was about 9.0 m.Finally,after dynamic replacement,there existed non-uniformity between replacement piers and soil among piers.And there existed non-uniformity between dynamic replacement zone and surrounding compaction zone.Therefore,non-uniformity of foundation soil after dynamic replacement should be fully considered during building design.