Research on Rammer Vent Holes Ultrasonic Clearing;

Mechanical calculation of cast iron rammer was made by using the finite element method and the cracking destruction was analyzed Considering the bimodulus of the cast iron the authors also analyzed the influence of the bimodulus Contacting time, rising and falling altitude and ground strong bodies were also discusse

A Study on the Impact Force of Pounder;

This paper introduces the wharf bed explosive compaction construction organization design, construction situation, as well as the comparison of construction effect between simply explosive compaction and a combination of explosive compaction with hamming compaction in Yangpu Port Phase II Project.

After using pneumatic rammer piling method, the construction cost was reduced, piling quality was raised and construction speed was increased.

The trenchless pneumatic hammers which don t rotate themselves during drilling include impact moles, pipe ramming hammers and pipe bursting hammers.

High power hydraulic pipe ramming hammer, hydraulic power station, joint disk, guide device, and patulous mechanism were developed to ram steel pipes or casings vertically into ground.