A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Design and performance of deep piled circular cofferdam
This paper describes design and construction of the large circular cofferdam in the Central Terminal Area of London's Heathrow Airport. The cofferdam is 60 m in diameter and 30 m deep and the principal feature in the recovery solution following the collapse of the station tunnels during construction in October 1994. It utilised 182 large diameter stepped secant/contiguous for the outer wall and 255 large diameter bored piles for the base slab. The design and construction had to deal with disturbed and unstable ground and major subsurface obstructions. There were also severe space limitations and environmental constraints. A key issue was the control of ground movements and the associated effects on the cofferdam itself and protection of adjacent structures. Major cost and time savings were achieved through the use of the Observational Method (Peck, 1969, Powderham 1998) and Value Engineering (VE) (ICE, 1996; Powderham and Rutty, 1994).
Design and performance of deep piled circular cofferdam
This paper describes design and construction of the large circular cofferdam in the Central Terminal Area of London's Heathrow Airport. The cofferdam is 60 m in diameter and 30 m deep and the principal feature in the recovery solution following the collapse of the station tunnels during construction in October 1994. It utilised 182 large diameter stepped secant/contiguous for the outer wall and 255 large diameter bored piles for the base slab. The design and construction had to deal with disturbed and unstable ground and major subsurface obstructions. There were also severe space limitations and environmental constraints. A key issue was the control of ground movements and the associated effects on the cofferdam itself and protection of adjacent structures. Major cost and time savings were achieved through the use of the Observational Method (Peck, 1969, Powderham 1998) and Value Engineering (VE) (ICE, 1996; Powderham and Rutty, 1994).
Design and performance of deep piled circular cofferdam
Powderham, A. (author)
1999
13 Seiten, 12 Quellen
Conference paper
English
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