Abstract: In the construction of large petroleum product storage tank farm project, the dynamic compaction and replacement method was used in the improvement of high fill soils for the first time. To validate the design parameters, a trial test area was selected for application of the dynamic compaction and replacement method. The construction procedures, test results, construction monitoring data and the site quality assurance testing data before and after the improvement were evaluated for the optimization of the design parameters for the soil improvement procedures to be applied in larger areas. The post construction settlement observation data for the petroleum product storage tank water filling test as well as in the operation of the storage tanks were also presented in the paper. The results indicated the dynamic compaction and replacement method is suitable for the improvement of high fill soils.

Key words: dynamic compaction replacement method, high fill ground, quality assurance after soil treatment；post construction settlement observations