What we do &
How we do it
A leader rig is a fast and efficient self-contained mobile machine for sheet pile installation and extraction. It consists of a 360° tracked base unit to which is fitted a telescopic mast. A vibrating hammer which drives the pile is fixed to a slide on the mast. This slide enables to vibrator to move down the mast as the pile is driven. The rig can pick up and pitch the pile itself before commencing driving.
Because the means of driving the pile is by vibration they are ideally suited to pile installation in granular soils. They are fitted with sophisticated instrumentation that allows the rig operator to monitor the verticality of the pile as it is installed and thus achieve compliance with the required tolerances. Although the rig is capable of picking up a pile from a stack we have found that increased outputs can be achieved by using a slave crane, either mobile or crawler, to pitch the pile. This allows the rig to maximise its time driving piles.
Berryrange has just purchased an new ABI TM14/17 leader rig fitted with a MRZV-20vv variable momentum vibrating hammer. This type of drive unit uses the very latest generation state of the Art unit offering unique patented technology which allows control of both variable static moment and variable frequency which results In greater efficiency, increased production rates, reduced fuel consumption, noise levels and transitions of vibrations though a wider variation of soil conditions.
We also own an ABI MDBA 4500 auger drive motor and 400mm diameter flight which can be attached in place of the vibrating hammer to pre-auger the soil in advance of pile driving where dense ground and thus harder driving conditions are expected or where a reduction in vibration is required.
The rig is fitted with an Auto docking system that allows the quick change between Auger to vibro and back without the need to work at height.
Leader rigs are also ideal for extracting and laying down piles.<?p>