Pile Driving?
Pile Driving?
(OP)
I was just wondering what the most widely used hammer for pile driving is? Diesel? Hydraulic? Vibratory? Or does it depend on the soil?
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RE: Pile Driving?
They need an air line and a compressor which must be moved with the crane.
The Vulcan 1 is kind of a standard hammer (If I had to pick one) It has a 5,00 pound ram and a drop of three feet. It operates at 60 blows a minute. So if you count 15 blows in 15 seconds, you know the hammer is workig properly. It has few moving parts and can suffer abuse associated with this work and requires little maintance.
RE: Pile Driving?
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RE: Pile Driving?
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RE: Pile Driving?
Are there any places where the diesels are restricted due to environmental concerns??
RE: Pile Driving?
RE: Pile Driving?
One thing I would mention is that, although the blow rate for an air/steam hammer is reasonably consistent, it isn't as absolute a way of correlating an energy as a single-acting diesel hammer. In other words, you can't do a "Saximeter" type of correlation for an A/S hammer as you can for a S/A diesel. The best way to insure the energy output of an A/S hammer to be acceptable is to make sure it's in good running condition (especially lubricated) and getting a full stroke.
With differential acting hammers, the pile rebound complicates things considerably re the blow rate. Back around the time of the last depression (terminology deliberate,) Vulcan introduced its differential acting hammers with a correlation between blow rate and energy. Needless to say, Vulcan was forced to beat a hasty retreat on that one, and I still get the occasional inquiry about that!
Information on Vulcan hammers can be found at
http://www.vulcanhammer.info
One thing about diesels and the environment concerns their use overwater and dripping oil and fuel. But diesels can be modified to use environmentally friendlier fuels (biodiesel, etc.) to mitigate these problems. Anyone who's been around diesels knows that they are "dirty" hammers by nature, but the manufacturers have done a reasonable job addressing the issues surrounding them.
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