SPF: Steel Pipe for crossing Fault
SPF Basic Concept
- To absorb large displacement by wave section
- To secure water flow function after deformation
- To be customized based on the design conditions (the number of waves, its height,etc.)
- Material : JIS G 3101 SS400(equivalent to ASTM A36/A36M)
- Diameter:800mm or larger (32in. or larger)
- Applicable to the areas of fault crossing section, ground displacement and landslide
SPF Standard Type
SPF Large Dispalacement Type
Performance test
Experiments had confirmed that cracks didn’t even occur with 30°bending
Track Record (Examples)
| Type | SPF Standard Type |
|---|---|
| Destination | Tokyo Metropolitan Waterworks Bureau |
| Diameter | 2,000mm(80in.) |
| Thickness | 18mm(0.7in.) |
| Fault displacement | 3.4m(11.2ft) |
| Type | SPF Standard Type |
|---|---|
| Destination | Kobe Waterworks Bureau |
| Diameter | 2,400mm(96in.) |
| Thickness | 21mm(0.8in.) |
| Fault displacement | 1.44m(4.72ft) |
| Type | SPF Large displacement Type |
|---|---|
| Destination | Hokkaido Regional Development Bureau |
| Diameter | 2,000mm(80in.) |
| Thickness | 18mm(0.7in.) |
| Ground settlement | 800mm(2.62ft) |
| Type | SPF Large Displacement Type |
|---|---|
| Destination | Metro Vancouver |
| Diameter | 2,500mm(100in.) |
| Thickness | 25mm(1in.) |
| Lateral flow | 1.77m(5.81ft) |