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7 Cards in this Set
- Front
- Back
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Drop Hammer |
Hoist line to lift ram; dropped by its own weight Rarely used because of slow operation and pile breakage |
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Single Action Hammer |
Ram lifted by steam; dropped by its own weight Good for driving in compact/hard soil; low driving speeds, large headroom |
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Differential Hammer |
Steam used to control rise and descent of hammer Suited for light/moderate pile weights in soils of average resistance |
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Diesel Hammer |
Ram is raised and fuel is injected; as ram dropps fuel and air gets compressed and hot resulting in explosion Good against dense soil that provides a lot of skin resistance; terrible with soft soil |
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Hydraulic Hammer |
Rams are lifted to a preset height using hydraulic pressure; dropped by its own weight Very short drops, high efficencies when they are power assisted |
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Hydraulic Driver |
Pile river grips the pile and pushes it down well suited for areas with space and noise restrictions, low on vibrations |
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Vibratory Pile Driver |
Two counter eccentric weights are rotated that generate vibratory forces Soil type choices: sand & gravel; good for soil saturated in water |
