VHE Construction used a long reach excavator to place soils within the gasholder to form the ramp down from high level to the dumpling, so we could access the lower levels with the large earthworks plant to complete the infilling of the gasholder.
In order to compact the soils into the ramp, we lowered a remote controlled Rammax roller into the base of the holder and were able to release the lifting chains and subsequently reconnect them after the compaction by using a remote controlled automatic hitch. The hitch has a large magnet which attracts the lifting shackle into a vertical position so that the hook on the automatic hitch can thread through it.
This allowed us to compact the ramp fills in the requisite layer thickness to ensure the stability of the ramp for vehicle access once it was up to the dumpling level, all without the need for man-access into the base of the holder.
Previously, the ramp has had to be de-constructed as the fill levels inside the holder are raised to ensure full compaction is achieved within the footprint of the ramp.
This system has avoided the need for personal access equipment, access and egress of personnel and the potential for recovery in the event of an incident.
To find out more, click on the links below.
Monitor Report. VHE Construction. Lancashire. November 2018.
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