在道中的聚氨固化轨道的活性断裂脱位诱导的机械反应
Wei Chen1, Dan Wu1, Minzhe Yu1
1School of Civil Engineering, Central South University, Changsha 410075, China.
Materials (Basel, Switzerland)
|June 13, 2025
概括
聚氨固化轨道床 (PSTB) 可以承受活跃断层区域的位移. 较高的断层位移和火车速度增加了脱轨的风险,需要限制速度以确保安全的铁路运行.
科学领域:
- 地质技术工程 地质技术工程
- 铁路工程 铁路工程是指铁路工程.
- 结构工程 结构工程
背景情况:
- 活跃断层区域对道轨道结构和火车运行安全构成重大风险.
- 传统的轨道结构易受压力再分配和由断层位移引起的几何变化的影响.
- 聚氨固化轨道床 (PSTB) 在地震活跃地区具有增强性能的潜力.
研究的目的:
- 为了研究PSTB在主动故障脱位下应力和变形反应.
- 分析故障位移对铁路轨道结构稳定性的影响.
- 根据轨道变形评估火车运行安全指数.
主要方法:
- 模拟受故障位移影响的PSTB的应力和变形.
- 开发一个包含轨道结构变形的车辆轨道动态模型.
- 计算火车运行安全指数,包括脱轨风险和减小车轮负载.
主要成果:
- 断层移位会导致轨道垂直变形,主要是在活跃断层区域内和附近.
- 宽卧被确定为结构上的脆弱性,易于在增加的压力下破裂.
- 更高的断层位移,更的断层角度和更窄的断层区域加剧了风险.
- 列车速度的增加加大了脱轨的风险和车轮负载的减少率.
结论:
- 在活跃断层区域中,PSTB表现出适应变形的能力.
- 易发生故障的地区的铁路基础设施需要仔细设计,考虑到故障特征和火车速度.
- 为了确保安全,建议PSTB的最大列车速度为250公里/小时,位移40毫米,断层角度为60°.
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