Posted on May 13, 2009 in Construction Technology & Machines
Dismantling of Gautrain’s giant Tunnel Boring Machine (TBM) is completed. The 11m long shield is the only part that will remain inside the tunnel where the head of the TBM came to rest. This will be covered with shotcrete to match the internal diameter of the precast concrete tunnel lining.
While some parts of the TBM were scrapped, other parts were salvaged for reconditioning and use on other tunnelling projects. The TBM workshop and surface infrastructure works was also demolished to make way for the construction of Rosebank Station’s parkade which is now underway.
Named Imbokodo, the TBM was built over a 12-month period in Germany and shipped to South Africa in the last quarter of 2007 before commencing its journey. The TBM started its drive in January 2008 at Rosebank Station below Oxford Road and completed its 2885m drive towards Killarney ahead of programme in January 2009.
Below follows some photographs that highlight the TBM’s journey.
PAINTED IN THE COLOURS OF THE SOUTH AFRICAN FLAG, THE
CUTTER HEAD OF THE TBM IS TRANSPORTED VIA ROAD TO
ROSEBANK STATION IN OCTOBER 2007. THE TBM WAS CUSTOM
MADE IN GERMANY
THE CUTTER HEAD IS LOWERED INTO THE SHAFT AT
THE TBM WAS NAMED IMBOKODO DURING A CEREMONY IN
THE TBM INSIDE THE ROSEBANK STATION SHAFT AS IT STARTS
BORING A TUNNEL TOWARDS KILLARNEY
DISMANTLED PARTS OF THE TBM WITH THE TBM TUNNEL
ENTRANCE IN THE BACKGROUND
INSIDE THE TBM TUNNEL WHERE THE HEAD OF THE TBM CAME
TO REST – DISMANTLING OF THE CUTTERHEAD
DISMANTLING OF THE TBM CUTTERHEAD INSIDE THE TUNNEL
LOCOMOTIVES TOW DISMANTLED TBM PARTS OUT OF THE
THREE-KILOMETRE TUNNEL BACK TOWARDS ROSEBANK STATION
WHERE THE TBM STARTED
VIEW FROM INSIDE THE TBM TUNNEL FACING ROSEBANK STATION
ARIAL VIEW OF THE TBM SHAFT ON THE SOUTH SIDE OF ROSEBANK
STATION. AS THE TBM WORKSHOP AND SURFACE INFRASTRUCTURE
WORKS ARE DEMOLISHED, CONSTRUCTION OF THE PARKADE CAN START