Full
Outline
This study comprehensively summarizes the testing scheme and results of a laddersleeper ballastless track in urban rapid rail transit for safety, stability, and vibration reduction performance compared with an ordinary ballasted track at a maximum speed of 220 km/h on the National Railway Test Center Circular Line in 2023. The test used eight CRH380AJ comprehensive inspection units, including the safety and stability of the wheelset derailment coefficient, wheel load reduction rate, wheelrail lateral force, vertical and lateral dynamic displacement indicators of the rail and sleeper, vertical and lateral vibration characteristics of the rail, and vibration reduction performance of the roadbed surface at a distance of 3.5 m from the centerline of the line. The test results for these indices were lower than the limits of the corresponding standards and close to those for the existing ballasted track. The test results show that the safety, stability, and wheelrail vibration characteristics of the laddersleeper ballastless track in urban rapid rail transit can satisfy the requirements of the line at a speed of 220 km/h. According to different weighting methods, the average vibration reduction of the laddersleeper ballastless track compared with an ordinary ballasted track in urban rapid rail transit can reach 3.35.1 dB and 4.46.8 dB. The test results provide a reference for urban rapid rail transit and intercity railway track vibration reduction technologies.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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