WJ-8 type fastener system is a kind of ballastless track fastener system developed to meet the technical requirements of passenger line, it is a special fastener system for laying all kinds of non-shoulderless track, which is optimized based on WJ-1 type and WJ-2 type ballastless track fastener system.
The fastener system can be applied to sleeper-buried (double-block sleepers and long sleepers) and slab ballastless tracks on bridges, tunnels and subgrades.
Components of the WJ-8 Railway Fastening System
| 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 Fastener System Features
The WJ-8 fastener system is a kind of ballastless track fastener system developed to meet the technical requirements of the German passenger car line fastener system. The fastener system is designed under the limited conditions of the size and position of the original plate type and the double-block ballastless track bearing groove, and is an elastic non-separating fastener structure with an iron rail pad.
| 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 | |