Low-energy DCM in soft subgrade

Researches and applications of low-energy DCM tests in the weak foundations expand the application field of DCM, while making an extra options for soft ground treatment. The low energy DCM is successfully put into practice in the soft soil subgrade. The settlements of the surface and in and outside the test area and the growth and dissipation of pore water pressure at different depths in the test area are monitored. A 1 m² loading plate is applied, and the shallow bearing capacity of design is verified. The results show that the low-energy DCM mainly affects the engineering properties of shallow soft soil, and the excess pore pressure dissipation lasts about 5 ~ 15 d, which is caused by dynamic compaction. Because of the low level energy, the construction of dynamic compaction has little effect on the surrounding environment. And it can meet the capacity requirements of soft subgrade.