1. Hammering Method: The hammering method uses tubular or guide rod diesel hammers to drive prefabricated piles to the required depth using impact energy. Its advantages are convenience and no need for external energy supply. However, its disadvantages include work cycle interruption in soft soil and noise and gas pollution during construction.
2. Vibration Method: The vibration method uses vibrating hammers or hydraulic pile drivers with corresponding hydraulic grapples for vibrating piling. Its advantages are low noise, no harmful gases, and strong penetration. However, its disadvantages are that vibrating hammers require specific startup loads, and hydraulic hammers are very costly.
3. Pressing Method: The pressing method uses the weight of a static pile driver to press prefabricated piles into the soil. Its advantages are no vibration or noise pollution, while its disadvantage is the soil displacement effect.
4. Water Jetting Method: The water jetting method primarily uses hammering or vibration to change the soil properties through water jetting to complete the pile driving. The advantages of this method include the pile hammer's own weight accelerating the pile driving operation. However, its disadvantages are the need for accurate control of water pressure and volume, and it should not be used in areas with cohesive soil or near important buildings.
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