land or offshore. Its strike energy ranges from 20 to 300 kN Á m. Its hydraulic
hammer allows the crane to suspend.
JUNTTAN Company of Finland began to produce hydraulic pile driver in 1976.
The hydraulic hammer is mainly suitable for steel pile, sheet pile and precast
concrete pile. The stroke and strike energy of the hammer head can be adjusted
steplessly to achieve the best strike efficiency, and the weight of the hammer head
can be changed to meet different construction requirements.
Dutch IHC Company began to produce double acting hydraulic hammers in
1970. Piling is carried out through the double effects of the weight of the hammer
head and the gas pressure in the nitrogen chamber of the hydraulic hammer. The
hammer core of the pile driving hammer is forged as a whole, and the fully enclosed
hammer structure can be used to drive piles on land and underwater guided by the
upper and lower bearings. Its hydraulic hammer can be divided into S series and S
C series. It is suitable for steel pile and concrete pile. Its strike energy ranges from 3
to 2300 kN Á m. It has been used in large-scale piling projects of CNOOC Ocean
Engineering Company, Shengli Oilfield, China Harbor Construction Group First
Navigation Engineering Bureau, China Harbor Construction Group Second
Navigation Engineering Bureau and China Harbor Construction Group Third
Navigation Engineering Bureau.
At present, the typical foreign hydraulic hammer products mainly include HH,
CX, CG series of BSP in Britain, S and SC series of IHC in the Netherlands and
HHK and HHKA series of JUNTTAN in Finland. Table 12.2 is a comparison table
of working parameters of several typical hydraulic hammers.
Table 12.1 Comparison of main performance of several typical hydraulic hammers
Manufacturer
Dutch IHC
JUNTTAN,
Finland
British BSP
Model
S-type
HHKA型
CGL370型
Piling method
Dual action mode
Single acting
mode
Single acting
mode
Number of accumulator
3
2
2
Cylinder
Single acting piston rod
Dual acting
piston rod
Dual acting
piston rod
Hydraulic pump
Variable pump
Variable pump
Variable pump
Control valve
Electromagnetic
directional valve
Pilot control slide
valve
Pilot control slide
valve
Stroke itinerary
Stepless adjustable
Stepless
adjustable
Stepless
adjustable
Maximum stroke strike
frequency
60 beats per minute
40 beats per
minute
38 beats per
minute
Maximum falling
acceleration
2.0 g
1.2 g
1.0 g
Strike energy
Maximum
Less
Minimum
12.1 Pneumatic–Hydraulic Composite Pile Driving Hammer
275
hammer allows the crane to suspend.
JUNTTAN Company of Finland began to produce hydraulic pile driver in 1976.
The hydraulic hammer is mainly suitable for steel pile, sheet pile and precast
concrete pile. The stroke and strike energy of the hammer head can be adjusted
steplessly to achieve the best strike efficiency, and the weight of the hammer head
can be changed to meet different construction requirements.
Dutch IHC Company began to produce double acting hydraulic hammers in
1970. Piling is carried out through the double effects of the weight of the hammer
head and the gas pressure in the nitrogen chamber of the hydraulic hammer. The
hammer core of the pile driving hammer is forged as a whole, and the fully enclosed
hammer structure can be used to drive piles on land and underwater guided by the
upper and lower bearings. Its hydraulic hammer can be divided into S series and S
C series. It is suitable for steel pile and concrete pile. Its strike energy ranges from 3
to 2300 kN Á m. It has been used in large-scale piling projects of CNOOC Ocean
Engineering Company, Shengli Oilfield, China Harbor Construction Group First
Navigation Engineering Bureau, China Harbor Construction Group Second
Navigation Engineering Bureau and China Harbor Construction Group Third
Navigation Engineering Bureau.
At present, the typical foreign hydraulic hammer products mainly include HH,
CX, CG series of BSP in Britain, S and SC series of IHC in the Netherlands and
HHK and HHKA series of JUNTTAN in Finland. Table 12.2 is a comparison table
of working parameters of several typical hydraulic hammers.
Table 12.1 Comparison of main performance of several typical hydraulic hammers
Manufacturer
Dutch IHC
JUNTTAN,
Finland
British BSP
Model
S-type
HHKA型
CGL370型
Piling method
Dual action mode
Single acting
mode
Single acting
mode
Number of accumulator
3
2
2
Cylinder
Single acting piston rod
Dual acting
piston rod
Dual acting
piston rod
Hydraulic pump
Variable pump
Variable pump
Variable pump
Control valve
Electromagnetic
directional valve
Pilot control slide
valve
Pilot control slide
valve
Stroke itinerary
Stepless adjustable
Stepless
adjustable
Stepless
adjustable
Maximum stroke strike
frequency
60 beats per minute
40 beats per
minute
38 beats per
minute
Maximum falling
acceleration
2.0 g
1.2 g
1.0 g
Strike energy
Maximum
Less
Minimum
12.1 Pneumatic–Hydraulic Composite Pile Driving Hammer
275