路桥过渡段路基速度动力特性试验研究  

Experimental Study on Bridge-approach Roadbed Dynamic Characteristic under High-speed

作　　者：李献民[1,2] 常鹏波 

机构地区：[1]河南省交通科学技术研究院有限公司,河南郑州450006 [2]中南大学土木建筑学院,湖南长沙410075

出　　处：《华北水利水电学院学报》2009年第5期48-52,共5页North China Institute of Water Conservancy and Hydroelectric Power

基　　金：国家自然科学基金项目(50678177)

摘　　要：通过采用动测试试验系统对秦沈客运专线一路桥过渡段路基速度动力特性进行现场试验研究,得到了行车速度对铁道无缝线路路桥过渡段路基动应力的在线路纵向上和深度方向上的影响特征;与此同时,定义了速度动力系数的概念,试验得出过渡段路基中速度动力系数都小于0.3,并预测了影响路基动力特性的临界速度的存在.研究结果对铁路客运专线过渡段结构的设计和施工有重要的指导意义.Through dynamic testing system,the speed-dynamic characteristic of a bridge-approach roadbed was studied in field test in the Qin-Shen passenger transport special railway line,the dynamic stress influence characteristic of seamless track bridge-approach roadbed in line and depth was obtained under train＇s running speed;at the same time,the conception of speed power coefficient is presented,and the speed power coefficient of bridge-approach roadbed was lesser than 0.3,and the existence of the critical speed which influence the roadbed dynamic characteristic was forecast.The research results provide some important instruction for the design and construction of bridge-approach structure of passenger transport special railway line.

关 键 词：路基 动力特性 现场试验 路桥过渡段 

分 类 号：U213.1[交通运输工程—道路与铁道工程]