PHC Pile - Pile business（Products）Inquiry
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
- * 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 using specified concrete strength Fc = 105 N / mm2. These products are optimal for the high bearing capacity pile construction method, and a wide range of designs 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
- ●Low cost designs can be offered with high allowable compressive stress.
| 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
-
These are ultra high-strength PHC piles using specified concrete strength Fc = 123 N / mm2. These products are optimal for the high bearing capacity pile construction method, and a wide range of designs 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
- ●Low cost designs can be offered with high allowable compressive stress.
| 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 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 105 pile | BF.S 123 pile | ||||||
|---|---|---|---|---|---|---|---|---|
| Type | A2 | B2 | C2 | A2 | B2 | C2 | ||
| Concrete | Design strength（N / mm2） | 105 | 123 | |||||
| Allowable unit stress for sustained loading （N / mm2） |
Compressive | 30 | 35 | |||||
| Bending | σce/4 | σce/4 | ||||||
| Oblique tension | 1.2 | 1.2 | ||||||
| Allowable unit stress for temporary loading （N / mm2） |
Compressive | 60 | 70 | |||||
| Bending | σce/2 | σce/2 | ||||||
| Oblique tension | 1.8 | 1.8 | ||||||
| Young’s modulus（N / mm2） | 40,000 | 40,000 | ||||||
| PC Steel Rod | Tensile strength（N / mm2） | 1,420 | 1,420 | |||||
| Yield strength（N / mm2） | 1,275 | 1,275 | ||||||
| Young’s modulus（N / mm2） | 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.
