Page 88 - Manual Produk PC SPUN PILE_final

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KARAKTERISTIK HAMMER & PENGUNAANNYA

TYPICAL PILE HAMMER CHARACTERISTICS AND USES
Steam or Air Diesel Hydraulic
Hammer Type Drop VIbratory
Single Acting Double Acting Differential Single Acting Double Acting Single Acting Double Acting
Rated Energy 9 to 81 kJ 10 to 2240 kJ 1 to 29 kJ 20 to 68 kJ 12 to 667 kJ 11 to 98 kJ 35 to 2932 kJ 35 to 2945 kJ --
Range (7 to 60 ft-kips) (7 to 1800 ft-kips) (1 to 21 ft-kips) (15 to 50 ft-kips) (9 to 492 ft-kips) (5 to 73 ft-kips) (25 to 2162 ft-kips) (25 to 2172 ft-kips)
Impact Velocity 7 to 10 2.5 to 5 4.5 to 6 4 to 4.5 3 to 5 2.5 to 5 1.5 to 5.5 1.5 to 7 --
(m/sec)
Blows/minute 4 to 8 35 to 60 95 to 300 98 to 303 40 to 60 80 to 105 30 to 50 40 to 90 750 to 2,000
pulse/minute
Energy Ram weight x Ram weight x (Ram weight + effective piston Ram weight x (Ram weight + Ram weight x (Ram weight + --
(per blow) height of fall ram stroke head area x effective fluid stroke chamber pressure) stroke effective piston
pressure) x stroke x stroke head area x
effective fluid
pressure) x stroke
Lifting power Provided by Steam or air Steam or air Provided by explosion of injected Hydraulic Hydraulic Electricity or
housting engine or diesel fluid hydraulic power
a crane
Maintenance Simple More complex More complex than for single acting More complex than most air impact More complex More complex HIghest
than drop hammer hammers than other impact than other impact maintenance
hammers hammers cost
Hammer All types except Versatile for any Timber, steel H, and pipe piles All type of piles All type of piles All type of piles Steel H and pipe
suitability for concrete piles piles, particularly end bearing piles.
types of piles large concrete and Very effective in
steel pipe granular soils
Major Lowest initial cost Relatively simple Fully enclosed and permit under-water Carry their own fuel from which power Fully variable Energy is variable Can be used for
advantages equipment and moderate cost operation. More productive than single is internally generated. Stroke is a energy can be over a wide range. pulling or driving.
acting. Generic lower dynamic forces. function of pile resistance. delivered. Can be used Fastest operating
DIfferential hammer uses less volume for underwater installation tool.
of air or steam than double acting and driving.
has lower impact velocity.
Major Very high dynamic Need air Cost more than single acting. Need Pollutes air with diesel exhaust. Higher initial cost. HIgher initial cost. High investment
disadvantages forces and danger compressor or air compressor or steam plant. Heavy Higher cost hammer. Low blows per and maintenance,
of pile damage. Heavy compared compared with most diesel hammer. minutes at higher strokes for single not reccomended
steam plant.
acting.
for friction pile
Lowest pile
productivity. with most diesel installation.
hammer
Remarks Becoming obsolete -- Ram accelarates downward under Stroke variable in single acting diesel Newer hammer Newer hammer --
pressure hammer. Very popular hammer type. type and may type and may
Biodiesel models available. require additional require additional
field inspection field inspection
and/or testing and/or testing