Basic principles of Engineering Construction:

The vibratory pile driver uses its high frequency vibration to vibrate the pile body at high speed, and sends the vertical vibration caused by mechanical equipment to the pile body. As a result, the soil structure around the pile changes greatly due to the vibration, the compressive strength decreases, and the soil around the pile vaporizes, thus reducing the friction between the pile and farmland. Then, it is driven by the vibration foundation and the weight of the pile body to sink it into the soil, When pulling out the pile, under the condition of high frequency vibration, the piling hammer manufacturer will pull up the pile body. If the vibration foundation pile driving meets the hard soil layer and moves down too slowly, the back arm can be used to move down or the pile body can be lifted 0.6-1.2 meters long, and then it can be quickly driven down again. The necessary exciting force of the foundation piling machinery and equipment should be determined according to the soil layer, soil layer, moisture content and the type and structure of the pile, Generally, 150-350kn vibration method is adopted to drive piles with high efficiency. The key points are U-shaped steel sheet piles, I-shaped steel sheet piles, Larsen piles, steel pipe piles and precast concrete piles with a length of 12m. This kind of foundation piling method works in sandy soil, but the actual effect is weak in clay. At this time, the more powerful model of our factory is adopted when necessary. The vibration method foundation piling process is: pile lifting__ Check__ Flatness__ Learn to put down the pile driver to make it slowly sink into the soil. The depth must be 1. (if necessary, install the pile cap)___ Check pile position and center line__ Pile driving by vibration to design depth 1__ Move the piling machine to the next pile and work again

Basic principles of engineering construction of pile driver and foundation pile hammer

Clay soil layer:

For the clay soil layer, the vibration effect destroys the original soil layer structure, changes the relative density of sand and reduces the cohesive force. With the increase of sensitivity, the friction resistance around the pile will increase. Therefore, it is necessary to apply the second stage acceleration or adopt the larger model of our factory

Sandy soil layer:

In view of the fusion and destruction of sand particles caused by the vibration of sandy soil layer, resulting in vaporization, the friction resistance of sand and pile around the pile is reduced, which is conducive to pile sinking. However, for high-density sandy soil layer and loose sand layer, the actual effect of vibration will be weakened due to soil characteristics. Therefore, different vibration output should be used