论文部分内容阅读
无缝道岔和桥上无缝线路是高速、重载铁路轨道结构强化的关键技术。与路基上无缝道岔相比,桥上无缝道岔区轮轨动力相互作用更强烈,轨道几何状态更难以保持,安全储备不足。以沪昆线湄池1号特大桥为工程背景,根据理论分析和现场试验,透析了有砟简支梁桥上无缝道岔轨道几何状态难以保持的主要原因,针对性地提出了增加横向约束来控制桥上无缝道岔轨道稳定性的方法。实践表明,采用所提出的控制方法能够有效改善轨道几何状态、提高列车运行平稳性,减少养护维修工作量。
Seamless turnouts and seamless bridges on the bridge are the key technologies to strengthen the structure of high-speed and heavy-load railway tracks. Compared with the seamless turnout on the subgrade, the wheel-rail interaction in the seamless turnout area on the bridge is more intense, the orbit geometry is more difficult to maintain, and the safety reserve is insufficient. Based on the engineering background of Meichi 1 super-large bridge on the Shanghai-Kunming-Kunluo railway line, the main reasons for the difficulty in maintaining orbital geometry of the seamless turnout on the Shuang-Jian Bridge are analyzed based on the theoretical analysis and field tests. Relevant lateral constraints To control the stability of the seamless turnout orbit on the bridge. Practice shows that the proposed control method can effectively improve the track geometry, improve the smoothness of train operation and reduce the maintenance workload.