Pile drivers are commonly used equipment in construction engineering. They utilize the high-frequency vibration effect generated by the pile driver to transmit vibratory force onto the pile for vertical driving. During the piling process, the soil structure around the pile gradually loosens due to the large vibratory force. At this moment, the soil layer is at its weakest strength, which facilitates the direct driving of the pile without sticking. When encountering high-strength rock layers during the vibration process, slow drilling is required. How can this problem be solved? We can utilize the vertical action of the mechanical arm to press the pile or lift the pile about 0.5-1.1m, then use vertical force to quickly sink the pile in a short time. For the vibration of the pile driver's pile, a comprehensive evaluation based on the local environment and geotechnical results is needed to select the appropriate vibratory force for piling. The piling generally adopts the 100-400kn vibration method, which is efficient. Generally, U-shaped steel sheet piles, I-shaped steel sheet piles, steel tube piles, and cement piles are suitable within a 10m range, and this piling method is most suitable for sand soil operations, with poor effects in clay operations. At this time, if necessary, we choose a more powerful machine. The vibratory piling procedure is: lifting the pile body, determining verticality, and finally sinking the pile accurately. These seemingly simple three steps actually involve quite a high level of technology.
For clay layers, vibration destroys the original soil structure, changes soil density, and reduces cohesion. As sensitivity increases, the resistance around the pile increases. It may be necessary to use two-stage acceleration or choose a larger model from our company. For the vibration of sand layers, we will find that the combination of soil particles gradually destroys under mutual interaction, leading to liquefaction. This situation can not only significantly reduce the resistance of the pile to the surrounding soil and the pile itself but also facilitates the sinking of the pile by the pile driver. However, if we encounter a loose quicksand layer, sometimes we cannot use this method.
Please fill out the form below according to your needs, and a Hengwang product specialist will contact you within one day.