About Vibratory Hammer
Published Time：
2021-03-09
Vibratory Hammer It is a special tool used in vibratory compaction construction. The working principle is that the submersible motor drives the eccentric block inside the vibrating body to generate centrifugal force through the coupling, making the entire vibratory hammer generate horizontal vibration. The vibratory hammer can be used in the construction of filled vibratory piles and densified vibratory piles. It is suitable for strengthening the foundation of various soils such as crushed stone soil, sand soil, silty soil, clay soil, artificial fill soil, and collapsible soil, as well as densification and liquefaction resistance treatment of various liquefiable soils. The stratum after vibratory treatment can withstand a certain dynamic load, which can improve the bearing capacity of the foundation, reduce settlement, increase the stability of the foundation, and improve the anti-liquefaction capacity during earthquakes.
Technical Development Vibratory hammers originated in Germany. Numerous engineering practices have proven that vibratory technology is the preferred solution for seismic reinforcement of soft foundations. After the 1976 Tangshan earthquake, China attached great importance to the research on seismic reinforcement of building foundations. The former Ministry of Water Resources and Electric Power entrusted the Beijing Surveying and Design Institute to establish a vibratory research group, which independently developed a 30KW vibratory hammer. It was successfully applied to the seismic reinforcement project of the fine sand dam foundation of the Guanting Reservoir in Beijing. In 1982, a 75KW high-power vibratory hammer was developed, greatly expanding the application range of vibratory technology. From 1976 to 1985, the vibratory research and testing group successively completed dozens of vibratory crushed stone pile projects, including the 引滦工程, the Lagdo Reservoir in the Republic of Cameroon, and the Jilin Qian Guo Refinery.
Power Model At present, Beijing Vibratory Engineering Machinery Co., Ltd. has accumulated forty years of experience in design, construction, improvement, and development of vibratory hammers in China, forming a series of domestic electric vibratory hammers with multiple models targeting different strata. According to the outer diameter, they are divided into 325, 377, and 426 series. The power has increased from 30KW to 260KW.
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