The "dynamic" of the word, generally appear in the pile machinery field. The dynamic compaction method is also called strong tamping method, dynamic consolidation method. It is to use large crawler crane to drop 8-40 tons of heavy hammer from 6-40 meters height, and to tamp the soil vigorously. Suitable for artificial fill, collapsible soil, loess.

Lifting equipment is the main machine for heavy tamping, and its rated lifting capacity is 1.5 - 3 times of the hammer weight, and most of our country is refitted by crawler crane. Select the crane according to the project and the lifting height of the hammer type. Single operation, can also be the main and auxiliary machine (shift hammer) joint operation.

The door frame is composed of a beam and two legs. The structure of the legs have lattice type or tube type. The door frame is hinged on the upper beam center top hanger. The dynamic tamping machine of the uncoupling device should use the crawler crane lifting hammer with automatic uncoupling device to ensure that the rammer does not topple when the landing gear is struck.

It is composed of hook and pulley with tie rod, equipped with traction wire rope. When the hammer reaches the specified height, the drop hammer can be automatically decoupled. Hammer selection according to the soil condition, the design requirements and dynamic decision level. The hammer weight is usually 80 - 400kN. A number of through holes are set up.

The hammer is made of cast steel, cast iron or steel shell concrete types. The shape of the round bottom hammer, hammer bottom and flat bottom, bottom, spherical, ground projection area is generally 4 - 8 square meters.

The bulldozer is the auxiliary mechanical compaction is essential, as a venue for leveling compaction.

Dynamic compaction can compact the land and lay a good foundation for the construction equipment, so that the project can be carried out smoothly and safely.