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PHC Pile

As high quality, high performance piles, centrifugal force high-strength prestressed concrete piles (PHC piles) account for the mainstream of foundation piles.

Products handled
MS-hi123 pile / MS-TS/ST123 pile / BF123 pile / BF-TS123pile
MS-hi105 pile / MS-TS/ST105 pile / BF105 pile / BF-TS105pile
Other MS-hi pile / MS-ST pile / BF pile / BF.S pile / JIS reinforced pile

Types of PHC Piles

Knotted pile / straight pile / extended node pile (medium diameter of extended head portion) / extended straight pile / thick head knotted pile

  • * Pile length 4 ~ 15 m
  • * In cases of piles 6 meters or less, please consult with us.
  • * Pile diameter: 300 ~ 1,200 mm

PHC105

Major features

These are ultra high-strength PHC piles with a concrete compressive strength of Fc = 105 N / mm². Our employment of the high bearing capacity pile construction method is optimized, and a wide range of designs that fully demonstrate the merits of each construction method will be possible.

For the thickness of the pile, we have a lineup consisting of a standard type, a thick type, and a special thick type.

Numbers used for design
1. Material strength
1-1 Concrete
Compressive strength 105.0 N / mm²
Tensile strength 5.5 N / mm²
Bending tensile strength 7.0 N / mm²
Young’s modulus 40,000 N / mm²
1-2 PC Steel Rod
Standards SBPDL1275/1420
Young’s modulus 200,000 N / mm²
Features
  • ●Uses ultra high strength concrete(Fc=105 N / mm²) and supports high bearing capacity
  • ●Allowable compressive stress is UP significantly
    Beneficial for cost reduction at design time
Types Allowable unit stress for sustained loading(N / mm²) Allowable unit stress for temporary loading(N / mm²)
Compressive Bending Diagonal Compressive Bending Diagonal
A 30.0 1.2 60.0 1.8
B 30.0 1.2 60.0 1.8
C 30.0 1.2 60.0 1.8
  • σce:Effective prestress(N / mm²)
Types Allowable compressive stress for sustained loading(N / mm²) Allowable compressive stress for temporary loading(N / mm²)
MS-hi MS-hi105 MS-hi MS-hi105
A 24.0 30.0 48.0 60.0
B 24.0 30.0 48.0 60.0
C 24.0 30.0 48.0 60.0
Comparison of flexural strength

The flexural strength of MS-hi105 (standard type) and MS-hi will be as shown on the right figure. (For representation, values for 1000mm pile diameters are shown.)
The MS-hi105 and the MS-hi have the same reinforcement strength for PC steel rods, so the yield strength at full tension is the same, but as the axial force increases, the ratio of the burden of concrete increases, so the greater the axial force applied to the pile, the greater the yield strength of MS-hi105 will be.

PHC123

Major features

The PHC123 pile is a pile that further improves on the PHC105 series.

Our employment of the high bearing capacity pile construction method is optimized, and a wide range of designs that fully demonstrate the merits of each construction method will be possible.

For the thickness of the pile, we have a lineup consisting of a standard type, a thick type, and a special thick type.

Numbers used for design
1. Material strength
1-1 Concrete
Compressive strength 123.0 N / mm²
Tensile strength 5.5 N / mm²
Bending tensile strength 7.0 N / mm²
Young’s modulus 40,000 N / mm²
1-2 PC Steel Rod
Standards SBPDL1275/1420
Young’s modulus 200,000 N / mm²
Features
  • ●Uses ultra high strength concrete(Fc=123 N / mm²) and supports high bearing capacity
  • ●Allowable compressive stress is UP significantly
    Beneficial for cost reduction at design time
Types Allowable unit stress for sustained loading(N / mm²) Allowable unit stress for temporary loading(N / mm²)
Compressive Bending Diagonal Compressive Bending Diagonal
A 35 1.2 70 1.8
B
C
  • σce:Effective prestress(N / mm²)
Allowable compressive stress for sustained loading(N / mm²)
MS-hi105 MS-hi123
30 35
Allowable compressive stress for temporary loading(N / mm²)
MS-hi105 MS-hi123
60 70
Comparison of flexural strength

The flexural strength of MS-hi105 (standard type) and MS-hi123 (standard type) will be as shown on the right figure. (For representation, values for 1000mm A-type standard form pile diameters are shown.)
The MS-hi105 and the MS-hi123 have the same reinforcement strength for steel rods, so the yield strength at full tension is the same, but as the axial force increases, the ratio of the burden of concrete increases, so the greater the axial force applied to the pile, the greater the benefits demonstrated by the MS-hi123 will be.

BF.S

Major features

These are piles with a thick head type used for tip piles in the high bearing capacity method.

In this series, we can select from compression performances of 85, 105, 123 N / mm², and it is possibel to design a wide range according to the required bearing capacity.

Numbers used for design
Name BF.S pile BF.S 105 pile BF.S 123 pile
Type A B C A B C A B C
Concrete Design strength(N / mm²) 85 105 123
Allowable unit stress for sustained loading
(N / mm²)
Compressive 24 30 35
Bending σce/4 σce/4 σce/4
Oblique tension 1.2 1.2 1.2
Allowable unit stress for temporary loading
(N / mm²)
Compressive 48 60 70
Bending σce/2 σce/2 σce/2
Oblique tension 1.8 1.8 1.8
Young’s modulus(N / mm²) 40,000 40,000 40,000
PC Steel Rod Tensile strength(N / mm²) 1,420 1,420 1,420
Yield strength(N / mm²) 1,275 1,275 1,275
Young’s modulus(N / mm²) 200,000 200,000 200,000
Comparison of flexural strength

The flexural strength of BF.S pile will be as shown on the right figure. (For representation, values for 700 - 6075 are shown.)
Each have the same reinforcement strength, so the yield strength at full tension is the same, but as the axial force increases, the ratio of the burden of concrete increases, so the greater the axial force applied to the pile, the stronger the compressive stength of the pile, the greater the yield strength of the pile.

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