Description
Technical Parameters
Railway Dog Spikes: Technical Specifications & Material Standards
| Parameter Category | Standard Grade | Heavy-Duty Grade | Corrosion-Resistant Grade |
|---|---|---|---|
| Applicable Rail Type | 40-50 kg/m rail | 50-60 kg/m rail | All rail types (coastal/industrial) |
| Spike Length (L) | 127 mm ± 2 mm | 140 mm ± 2 mm | 127 mm ± 2 mm |
| Shank Diameter (D) | 16 mm ± 0.5 mm | 18 mm ± 0.5 mm | 16 mm ± 0.5 mm |
| Dog Head Height (H) | 32 mm ± 1 mm | 35 mm ± 1 mm | 32 mm ± 1 mm |
| Material Grade | Q235B / A36 | 45# Steel / 1045 | 316 Stainless Steel |
| Tensile Strength | ≥ 410 MPa | ≥ 585 MPa | ≥ 515 MPa |
| Surface Treatment | Hot-dip galvanized (50μm) | Black oxide coating | Passivation only |
| Hardness (HB) | 120-150 | 200-250 | 150-180 |
| Bending Test | Bend 90° without fracture | Bend 45° without fracture | Bend 90° without fracture |
| Standard Reference | GB/T 990, AREMA 4-3-4 | TB/T 447, UIC 864 | ASTM A276, ISO 3506 |
Railway Dog Spikes: Engineering Application & Maintenance
| Engineering Context | Installation Specification | Inspection Criteria | Replacement Threshold |
|---|---|---|---|
| Wooden Sleeper Track | Driving angle: 45°±5°, Penetration depth: ≥90 mm | Head tight to rail base, no lateral movement | Head wear >5mm, loosening under impact |
| Concrete Sleeper Retrofit | Use epoxy anchoring system, torque: 80-100 Nm | Anchor adhesive intact, no crack in concrete | Spike uplift >2 mm under 10 kN pull |
| Curve Track (R<400m) | Install on both sides of rail, enhanced spacing | Check monthly for creep-induced loosening | Any visible shift in spike position |
| Bridge Deck Track | Vibration-damping washer required | Quarterly torque verification | Fatigue crack at shank-to-head junction |
| Frost-Heave Zone | Anti-uplift collar mandatory | Seasonal level check after thaw | Uplift deformation >3 mm |
| Driving Method | Manual sledge / hydraulic spike driver | Head deformation not allowed | Tool marks causing stress concentration |
| Maintenance Cycle | Visual inspection every 6 months | Use 0.5mm feeler gauge for gap check | Corrosion depth >0.5mm (steel types) |
| Removal/Reuse | Not recommended for structural reuse | Discard if shank shows necking | Straightness deviation >1% of length |
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