When the first high frequency hydraulic press vibration hammer appeared in the former Soviet Union, each set of bt-5 vibration hammer was developed by D. Barkan and invested in production and application. Along with the development trend of the period, the technicality of the high frequency hydraulic vibration hammer has been widely spread all over the world, such as PTC and tra in the Netherlands, MGF in France, tomen in Japan, ice in Britain. Now, the technicality of high frequency hydraulic vibration hammer has already reached the mature stage, which is widely used in various production and manufacturing infrastructure theme activities.
What is the difference between high frequency hydraulic hammer and general vibration hammer? Why can it gain global recognition? What are its advantages?
Compared with the previous pile driver, it is an energy-saving piling machine. During the construction, the vibration is small, the noise is low, and the neighbors disturb the residents. Secondly, the hydraulic piling hammer manufacturer, this is the high-efficiency piling machinery, under normal circumstances, the engineering construction efficiency of the high-frequency hydraulic hammer is 12 times that of the general piling machinery. The other is that this kind of pile construction machinery is relatively light, and only two small and medium-sized trucks are needed to transport the whole set of machinery and equipment, so it is very convenient to change the site during construction. In addition, this is a relatively high-quality and low-cost piling machinery. Compared with rotary drilling rig and other construction machinery and equipment, the price is more cost-effective under the premise that the amount of labor is equivalent. It has a very obvious advantage, that is, it has a wide range of geological applications. According to the geological conditions and engineering projects, we must use the high frequency hydraulic hammer with different series of products and different exciting force as the construction machinery and equipment. We have a strong working ability through the river pebble layer, sand layer, urban garbage and other geological layers. Except that it is not allowed to enter the rock, all other geological standards can be integrated. Therefore, to sum up, the high frequency hydraulic vibration hammer is this kind of intelligent pile construction machinery, which has good application and marketing promotion market prospect in the pile foundation industry at this stage.
Basic theory of vibration hammer of high frequency hydraulic press
The vibrating pile driver uses the forced vibration caused by the vibration exciter, which makes the particles in the soil layer deviate, destroys the structural compressive strength of the soil layer, significantly reduces the friction resistance, and shows the white pseudo vaporization characteristics. Under the effect of the pile driver and the pile weight, the pile body sinks into the soil layer. It is widely used in various pile engineering projects.
When the vibrator of hydraulic press vibrates at high frequency, the pile is regarded as a centrifugal separated rigid body, and the soil layer is regarded as elastic-plastic body, which is the malleable support plate of the pile. Pile and soil layer constitute a single degree of freedom vibration management system. The pile only vibrates vertically, and each part of the pile has the same amplitude and frequency. The forced vibration frequency of the vibrator is close to the natural vibration frequency of the management system, and the vertical vibration of the pile is caused by the burying. When analyzing the vibration of the pile, only the viscous friction resistance is recorded, and it is considered that the friction resistance is a linear function of the fitness exercise speed.
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