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Thursday, September 02, 2010 |
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Slipforming @ Kusile Auxiliary Bay Lifts Shafts & Shear Walls
:: News
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Source: Paul Botha
Commencing in April 2010, the Stefanutti Stocks Civils division will be sliding twelve Auxiliary Bay lifts and twelve Auxiliary Bay shear walls at Kusile power station.
These structures are as follows:
Type 1 Lift & Stair Shaft
• Shape - Rectangular
• Wall thickness - 350mm
• Wall height - 28 681m
• Dividing walls - Yes
Type 2 Stair Shaft
• Shape - Rectangular
• Wall thickness - 350mm
• Wall height - 20 600m
• Dividing walls - None
The challenge on this project will be to slide the type 1 structure to level 27 551 and then split the sliding platform into
two sections leaving the stair shaft section behind. Then the team will complete sliding the 1 130 lift shaft section to level 28 681. “This is certainly not unfamiliar territory to our team,” says Paul Botha, slipforming site agent. “We have dealt with these types of scenarios in the past, most recently at Ngezi Platinum Mine Expansion Project in Zimbabwe.”
The team will need to slide the shear walls, which will act as a stabiliser for the steel structure located in the Auxiliary Bay, including access doors that will be slid into the Shear Wall structure, serving as access between the Boiler House and the Auxiliary Bay. The shear walls will consist of the main concrete structure and various cast-in plates at different intervals.
The contract duration is 18 months in which the slipforming teams need to complete a total of 24 slides.
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