Hammer's Impact Force on Pile and Pile's Penetration

摘要: Methods of energy and momentum conservation, vibration theories, model tests are employed to research the impact force a hammer on pile pile's penetration. An analytical formula is obtained. A comparison results from three methods finds that proposed by this article conforms well practical situations. Research show if hammer's remains unchanged, penetration increases with increase weight cushion stiffness. In addition, received head degrades weight, but Impact time decreases stiffness, weight. The test shows that, when compared cotton cloth cushion, an elastic cushion's advantages lie in relatively small can achieve significant co...