Dynamic compaction machine is widely used in various foundation treatment projects. During this period, dynamic compaction technology scheme is appropriate for soft soil foundation construction of highway engineering. In order to tamp the foundation, the construction sequence of dynamic tamping is to reinforce the deep soil, then the middle soil, and the surface soil. After all tamping, the tamping pit will be leveled.
The rammer of dynamic compaction machine shall be cylindrical steel rammer with high elastic modulus, or cylindrical rammer with reinforced concrete poured in thick steel shell, and the weight of dynamic compaction machine rammer shall be 10 tons. At the bottom of the rammer, 4-6 ventilation holes connected with the top surface shall be symmetrically arranged, so that the air at the bottom of the rammer can be cleaned when lifting the hammer and the suction at the bottom of the pit can be reduced. In the process of dynamic compaction machine construction, which aspects will affect the construction speed of dynamic compaction machine? How can we improve it?
Foundation dynamic compaction machine is widely used in construction projects and reclamation projects. In addition to single pier loading test, dynamic penetration test and other effective means should be used to check the bottom of replacement pier and the change of bearing capacity and density with depth, For saturated silt foundation, it is allowed to use single pier composite foundation load test instead of single pier load test.
The construction speed of the dynamic rammer is related to the dynamic ramming energy. The insufficient ramming strength of the dynamic rammer will lead to the failure of tamping the land base, and the foundation gap does not disappear completely. The ramming strength generally depends on the ramming height of the rammer and the weight of the rammer itself.