What is vibratory hammer?

A vibratory hammer is used to drive sheet piles, pipes or other elements into the soil by vertical vibrations. The adjacent soil particles are put into motion and thus the soil is ‘loosened’. The dynamic weight of the hammer will drive the elements into the soil (extracting is done with a crane).

How does a vibro hammer work?

The vibratory piling machine transfers vertical vibrations to the pile via the hydraulic clamp. This, in turn, transfers vibration to the ground which reduces the friction between the pile and the ground allowing the pile to be driven or extracted with less force.

What is vibratory piling?

To drive or extract a pile by means of inducing a vibration in to the pile element, greatly reducing skin friction properties and allowing the pile to move through the ground with considerably less resistance than it would do under a static load.

How do I choose a vibro hammer?

Thumb rules Selecting the Vibratory Hammer For clay: The amplitude is important and must be higher than for sand. The necessary eccentric moment in kgm must be 4 to 5 times the pile weight in tons For sand: The amplitude is less important than for clay, but should be between 3 and 6 mm.

What can a vibro hammer be used for?

Vibro hammer is a machine used to drive piles in/out of the ground for constructing structures like bridges, harbors, roads, airports, canal works and so on. They are quiet and have many advantages compared to traditional pile drivers which use a large weight to strike the pile.

Which is the best definition of the word vibration?

capable of or producing vibration. vibrating. of the nature of or consisting in vibration. of or relating to vibration.

What is a vibro and what does it do?

Vibro Definition A vibro is a tool that, when attached to a pile, shakes it up and down in a vertical motion for the purpose of installing or removing it from the soil. Vibro Definition Vibratory Pile Driver/Extractors In Action!

Why does the hammer on the left have less amplitude?

The hammer on the left has the same eccentric moment but less amplitude because the vibrating mass is heavier. Amplitude will decrease with increase of pile weight. Big piles need bigger vibros to offset loss of amplitude. 4000 in-lbs. Amplitude