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Author:
Tom Sklucki
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2002-01-21 |
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I've been looking at effects of tunnel settlement on some old piled structures East of London. The drawings (dated 1957) show a 'Holmpress' pile, described as a 14 inch diameter reinforced concrete cast in situ pile, with 40 ton load capacity. Has anyone any information on this pile type ? Onlt thing I could find was a 'Pressure Piling' type bored pile in a 1965 copy of "Oscar Faber's Reinforced Concrete". This used a compressed air lock on top of the pile.
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Follow-up:
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Author:
Vincent O'Hara
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2004-05-25 |
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Tom
The Holmpress pile is one of the piling systems that was offered by Keller up to the late 1960s.
The main tube is driven into the ground and the reinforcement cage is lowered into it. Vanes ensure that the cage is centred.
The main tube is then filled with (low slump) concrete and then withdrawn, leaving the concrete in contact with the soil.
The redrive tube is driven down the centre of the reinforcement cage, forcing the concrete downwards and outwards. Waists and gaps which may have been left are thus eliminated.
The redrive tube id then filled with concrete and then withdrawn, leaving the detachable shoe in the base of the pile.
I retain an old brochure with pictures and diagrams.
These piles may have been constructed using piling leader frames as opposed to crawler mounted rigs.
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Subject:
'Holmpress' piles 