Type WJ-8 Rail Fastening System is a ballastless track fastener system developed to meet the technical requirements of the passenger dedicated line fastener system and to adapt to the laying of the existing shoulder-free ballastless track in Germany.
| Specifications for ONE unit of WJ-8 Rail Fastening system | ||
| Item | Quantity | Material |
| Rail clip | 2 | 60Si2MnA |
| Screw spike | 2 | 20MnTiB |
| Flat washer | 2 | Q235A |
| Rail Insulator | 2 | PA66 |
| Guide plate | 2 | Reinforced Nylon 66 (PA66) |
| Rail pad | 1 | EVA, or rubber |
| Tie plate | 1 | QT450-10 |
| Plastic dowel | 2 | HDPE, Reinforced Nylon 66 (PA66) |
| Rail Adjustable Pad | 2 | PE |
| Tie Plate adjustable pad | 2 | PE |
WJ-8 Rail Fastening System Technical Requirements
| Fastener type | WJ-8 type fastener | ||
| Taxonomy | With iron rail pad (thickness 16mm) | ||
| Withstand lateral force | Sustained by concrete shoulders | ||
| Connection with the foundation | Embedded plastic casing | ||
| Embedded member pull-out resistance | Not less than 60kN | ||
| Buckle | Types of | W1 type | Type X2 |
| Buckle pressure | >9kN | 6kN | |
| Strike | 14mm | 12mm | |
| Fastening method | Bolt fastening | ||
| Tightening torque | About 160Nm | About 110Nm | |
| Rail longitudinal resistance | >9kN | 4kN | |
| iron rail pad fastening torque | -- | ||
| Elastic cushion | Setting | A cushion layer (rubber pad or composite rubber pad) is arranged under the rail, and an elastic cushion layer (thermoplastic elastomer foaming pad) is arranged under the iron rail pad plate. | |
| size | Class A | Class B | |
| Under rail rubber pad: 175 × 156 × 4 | |||
| rail pad under the iron rail pad 285×150×12 | |||
| Under-arc cushion stiffness | >300 kN/mm | ||
| Sub-layer cushion stiffness | 30～40kN/mm | 20~30kN/mm | |
| Rail height | High rail surface | 208 | |
| Adjustment amount | 30mm | ||
| Adjustment method | By adjusting the height of the pad between the rail and the iron rail pad to achieve 10mm adjustment; padding the pad on the sleeper bearing groove to achieve 20mm adjustment. The filling pad can be adjusted steplessly. | ||
| gauge | Adjustment amount | ±10mm | |
| Adjustment method | It is realized by replacing the gauge baffles of different specifications. | ||
| Adjustment level | Level adjustment, level 1mm | ||
| Rail joint treatment | In general, when the general gauge adjustment amount is large, replace the joint gauge baffle. | ||
| Applicable to ballastless track | Armless track structure | ||
| Drawing number and standard | Research Line 0604, Science and Technology Base [2007] 207 | ||
| Application condition | 250km/h | 350km/h passenger line | |
