Removal, lift and transportation of stacker and tripper car, Australia
ALE has completed the removal and site transportation of two components of a complete stacker: a 106t tripper car (approximately 51m x 8m x 14m) and a 224t stacker (approximately 48m x 9m x 10m) at the West Angelas mine site in Western Australia for the Deposit B site development.
To remove and decommission the two components, they were split and lifted off the railway by two crawler cranes, a 600t capacity and a 280t capacity crawler crane, in two separate lifts. Before the lifts, several platforms had to be removed to gain access to the lifting points.
Because of the operational and site restriction constraints, ALE were required to prepare detailed lifting studies in order to identify the best lifting sequence, crane positioning and item laydown positions.
Considering the layout of the lifting points, the stacker component was lifted using a dedicated non-standard rigging arrangement which was designed and supplied by ALE.
The entire lifting operation was safely completed in one shift, half the time planned for the operation.
Once both the items were safely positioned on the crane pad, they were transported using 24 axle lines of SPMT with 16 axle spacers to a designated laydown area for final decommissioning.