| 刚性地基低路堤长期动力特性原位试验研究 |
| |
| 引用本文： | 苏谦,白皓,黄俊杰,李星,张文超.刚性地基低路堤长期动力特性原位试验研究[J].土木工程学报,2011(Z1):147-151. |
| |
| 作者姓名： | 苏谦 白皓 黄俊杰 李星 张文超 |
| |
| 作者单位： | 西南交通大学高速铁路线路工程教育部重点实验室; |
| |
| 基金项目： | 中央高校基本科研业务费专项资金(SWJTU09CX004); 铁道部科技研究开发计划重点课题(2008G031-c) |
| |
| 摘 要： | 无砟轨道与深埋式桩板结构低路堤形成的"上刚-中柔-下刚"结构体系,导致基床受力加大、状态复杂,因此有必要针对刚性地基低路堤长期动力特性进行专门的动力试验研究。通过京沪高速铁路试验段模拟列车动荷载的原位循环激振试验,测定低路堤不同断面、不同深度处的动力响应,分析刚性地基上低路堤长期动力特性。结果表明:刚性地基上低路堤动力响应在激振70万次后趋于稳定,各典型断面动位移幅值均小于0.1mm,路基面动刚度值介于280~350MN/m之间,断面间刚度差异较小;激振150~200万次后累积变形为0.3~0.4mm;由轨道结构、基床和桩板结构、地基构成的"上刚-中柔-下刚"结构体系具有良好的长期动力稳定性。
|
| 关 键 词： | 京沪高铁 刚性地基 低路堤 长期动力特性 激振试验 |
In-situ tests on long-term dynamic characteristics of low embankment on rigid foundation |
| |
| Su Qian Bai Hao Huang Junjie Li Xing Zhang Wenchao.In-situ tests on long-term dynamic characteristics of low embankment on rigid foundation[J].China Civil Engineering Journal,2011(Z1):147-151. |
| |
| Authors: | Su Qian Bai Hao Huang Junjie Li Xing Zhang Wenchao |
| |
| Affiliation: | Su Qian Bai Hao Huang Junjie Li Xing Zhang Wenchao(Key Laboratory of High-Speed Railway Line Project of Ministry of Education,Southwest Jiaotong University,Chengdu 610031,China) |
| |
| Abstract: | The structural system of rigid-soft-rigid in order of depth formed by the unballasted track and the low embankment of deeply buried pile-board structure increases the complexity of the subgrade stress state.It's necessary to conduct special dynamic test to study the dynamic characteristics of the low embankment on this rigid foundation.Dynamical responses of low embankment in different depths and sections were measured in the in-situ test of cycle vibration on test sections of Beijing-Shanghai high speed ra... |
| |
| Keywords: | Beijing-Shanghai high speed railway rigid foundation low embankment long-term dynamic characteristics vibration test |
| 本文献已被 CNKI 等数据库收录！ |
