This technology is a low-noise pile driver that combines an active noise control system—consisting of a soundproof cover, noise detection sensors, control sound emitters, and a control unit—with a pile driver where a ram lifted by a cylinder strikes a pile via a drive cap. When the sensors detect impact noise, the emitters, placed at a set distance, release a control sound that cancels it out.
Pile driving methods face strict regulations due to noise and vibration complaints. Alternatives like the SIP method cause significant noise, vibration, and pile damage during final light tapping for bearing capacity, while pulse discharge methods are over 15 times more expensive and highly sensitive to soil conditions. Passive methods, such as placing sound-absorbing or insulating materials on pile heads, struggle to reduce low-frequency noise below 500Hz, requiring thicker materials that increase space constraints and costs, effectively making pile driving unusable in urban areas.
This technology features noise detection sensors and control sound emitters installed through the walls of a hollow, open-ended soundproof cover. The control unit generates a sound with a 180-degree phase difference from the noise, eliminating it through destructive interference. The soundproof cover uses sound-absorbing and insulating materials to absorb noise while directing sound to improve cancellation efficiency. It can be used for urban foundation work, bridge and retaining wall construction near residential areas, and pile driving near schools or hospitals, enabling the use of pile driving in cities by reducing low-frequency impact noise that passive materials cannot handle, without significantly increasing construction costs.
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