摘要
为指导高烈度地震区桥上无砟轨道选型,结合地震区桥上无砟轨道的工程特点,提出无砟轨道选型需求及选型原则。通过综合分析我国CRTS系列无砟轨道的技术特点、施工性能、耐久性、可维修性、经济性及其对地震的适应性,研究地震区桥上无砟轨道选型方案及工程设计对策。研究结果表明:地震下相邻梁缝处易出现变形不一致,且连续轨道板一旦断裂对桥墩不利,地震区桥上无砟轨道应优先采用单元式无砟轨道;地震区桥上无砟轨道一旦发生破坏,应具备快速修复的能力;在综合考虑无砟轨道施工性、耐久性、可维修性及经济性等基础上,建议高烈度地震区优先采用CRTS双块式无砟轨道;为保证地震区桥上无砟轨道的安全性,建议开展无砟轨道抗震设计、地震灾害预警监控系统和地震适应性防护措施等方面研究工作。
In order to guide the type selection of ballastless track on bridges in high-seismic earthquake regions,the type selection principle and requirements of ballastless track on bridges in seismic areas are proposed based on the engineering characteristics of ballastless track on bridges in earthquake regions.The technical characteristics,construction performance,durability,maintainability,economy and adaptability to earthquake of CRTS series ballastless track in China,the type selection scheme and engineering design countermeasures of ballastless track on bridges in earthquake regions are analyzed.The results show that inconsistent deformations are likely to occur in the joints between adjacent beams under earthquake,and once the continuous track slab is broken,it is harmful to the piers.The ballastless track on bridges in the earthquake regions should be given priority to adopt the unit ballastless track.Once the ballastless track on bridge is damaged under earthquake,it should have the ability to be quickly repaired.Considering the construction,durability,maintainability,economy and other aspects of the ballastless track,it is recommended to adopt the CRTS double-block ballastless track in high seismic earthquake regions.In order to ensure the safety of the ballastless track on bridges in earthquake regions,it is recommended to study the seismic design of the ballastless track,the earthquake disaster warning and monitoring system,and the seismic adaptive protection measures.
作者
徐浩
谢铠泽
田春香
胡连军
XU Hao;XIE Kaize;TIAN Chunxiang;HU Lianjun(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China;School of Safety Engineering and Emergency Management,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)
出处
《铁道标准设计》
北大核心
2022年第12期1-5,共5页
Railway Standard Design
基金
中国科协青年人才托举工程(2019QNRC001)
国家自然科学基金项目(52008272)
中铁二院工程集团有限责任公司科技研发计划项目(KSNQ213008)
关键词
高烈度地震区
桥上无砟轨道
轨道选型
工程对策
抗震设计
地震预警
high seismic earthquake region
ballastless track on bridge
track selection
engineering countermeasures
seismic design
earthquake warning
