| 胡萍,谭志催,龙慧,王永和.不同填料填筑高速铁路隧—涵—隧过渡段路基的动力特性分析[J].南华大学学报(自然科学版),2017,31(2):97~101, 112.[HU Ping,TAN Zhi-cui,LONG Hui,WANG Yong-he.Dynamic Analysis of High-Speed Railway Subgrade ofTunnel-culvert-culvert Transition Section with Different Fillings[J].Journal of University of South China(Science and Technology),2017,31(2):97~101, 112.] |
| 不同填料填筑高速铁路隧—涵—隧过渡段路基的动力特性分析 |
| Dynamic Analysis of High-Speed Railway Subgrade ofTunnel-culvert-culvert Transition Section with Different Fillings |
| 投稿时间：2017-05-12 |
| DOI： |
| 中文关键词: 隧—涵—隧过渡段 动力分析 高速铁路 路堤填料 |
| 英文关键词:tunnel-culvert-tunnel transition section dynamic analysis high-speed railway embankment fillings |
| 基金项目:湖南省教育厅课题(15C1194)；湖南省自然科学基金项目(2017JJ3263)；南华大学博士科研启动基金(2011XQD23) |
|
| 摘要点击次数: 879 |
| 全文下载次数: 639 |
| 中文摘要: |
| 基于D'Alembert原理的能量弱变分和整体Lagrange格式,建立了隧—涵—隧过渡段半空间垂向耦合的动力计算模型.通过现场实测结果和数值分析的对比证明了该计算模型具有较好的精确性和适用性,并利用该模型分析计算出不同填料填筑过渡段路基后在移动列车荷载作用下的动态响应特征.分析结果表明:竖向动位移随过渡段纵向呈“W”或“M”形状,起伏很大,动位移、动速度、动加速度衰减速度随深度的增加而增大,不利于行车的平顺性； 但A、B组填料,级配碎石和级配碎石+5%水泥均能满足高速铁路动力响应要求；采用A、B填料作为路堤本体的填筑材料是可行的,但采用级配碎石或级配碎石+5%水泥填筑隧—涵—隧过渡段路堤本体层更加合理. |
| 英文摘要: |
| Based on the D'Alembert principle of energy weak variation and the Lagrange format,a vertical coupling dynamic model for tunnel-culvert-tunnel transition section is established.The model has been improved to have good applicability and accuracy by comparing with the real test.The analysis results show that the vertical displacement along the longitudinal transition section is changed great like “W” or “M” shape,the dynamic displacement,dynamic velocity,dynamic acceleration are decayed with depth increasing,which is bad for driving comfort;but A,B fillings,graded gravel and gravel filled with 5% cement can meet the requirements of high speed railway dynamic response;gravel or gravel with 5% cement can be used for tunnel-culvert -tunnel transition section embankment filler layer;A,B fillings are feasible for embankment in high-speed railway. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|