New Innovation - Use of a Long Reach Excavator
19 December 2018
At our recent gasholder infilling works in Wigan, on behalf of long standing client National Grid, VHE used a Remote Automatic Safety Hook to attach and unattach a remote controlled Rammax roller in the base of an underground gasholder.
This was particularly useful as there was no need for site staff to enter into the base of the holder during the initial placement and compaction of soils to construct the earthworks ramp onto the dumpling of the holder.
The soils were end tipped outside the holder, then placed in shallow layers in the ramp location by a long reach 21 tonne excavator, reaching down into the base of the holder whilst positioned a safe distance back from the leading edge of the holder. The roller was then hitched onto the backactor, lowered down onto clay fills and automatically un-hitched by the remote controlled unit. Compaction of the clays was then carried out by the roller with the banksmen outside the holder operating the remote control keyboard.
On completion of the compaction, the roller was re-connected to the hitch, with the heavy duty magnet connecting to the hitch and holding it upright so that the hook of the unit could safely pass through the eye and fully connect the roller to the crane to be safely lifted out of the holder ready for the next layer of soils.
Our innovative use of a long reach excavator, along with our use of solar powered CCTV security units, have been featured on the Considerate Constructors Scheme Best Practice Hub. They have also featured a short clip of the long reach excavator in action.