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Impact driving installs the piling elements dynamically. A hydraulic hammer, usually mounted on a piling rig with leader, impacts on the piling element using a ram mass. Impact driving is used for the same applications as vibrating. The hydraulic hammers currently available are able to transfer much higher dynamic forces. For this reason impact driving is commonly used for very large and long piling elements.
(Kelly winch)
The video shows different pile driving applications with hydraulically driven free-fall hammers.
The hydraulically driven free-fall hammers of the H series are ideally suited for impact driving steel pipes, I beams, sheet piles and precast concrete and timber piles. The hammers are completely integrated in the control system of the Liebherr carrier machines.