1. Different references
1. Pile pressing: The pile pressing mechanism of the static pile driver uses the self-weight of the pile driver and the counterweight on the frame to provide reaction force. The pile driving process of pressing prefabricated piles into the soil
2. Pile feeding: It is a long-term driving method that drives the top of the pile to the ground or below the water surface and is sleeved on the top of the pile to transmit the hammering force.
2. Different characteristics
1. Pile pressing: When the pile tip "pierces" into the soil, the initial stress state of the undisturbed soil is destroyed, causing compression of the soil under the pile tip. Deformation occurs when the soil produces corresponding resistance to the pile tip. As the pile penetration pressure increases, when the stress on the soil at the pile tip exceeds its shear strength, the soil deforms sharply and reaches ultimate failure.
2. Pile delivery: When driving piles, since the chassis of the pile driver is a certain distance from the ground, the piles cannot be driven into the designed position below the ground. Instead, a pile driver and a pile delivery machine are needed to drive the prefabricated piles** *Sent into the soil together.
3. Different advantages
1. Pile pressing: It completely avoids the vibration, noise and pollution caused by hammering pile driving, so there is no damage to the piles and no noise during construction. , no vibration, no impact, no pollution and other advantages.
2. Pile delivery: When the pile is sinking until the top of the pile is about 30cm above the natural ground, a special steel tool is required. The pile delivery machine uses this pile delivery tool to sink the pile into the natural ground. The designed pile top elevation below the ground is then lifted back to the ground.
Baidu Encyclopedia - Static Pressure Pile
Baidu Encyclopedia - Delivery Pile