Model Test Investigation of Pile-Plank Embankment of Ballastless Truck for High-Speed Railway
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摘要: 为了研究列车荷载作用下无碴轨道桩板结构路基的动力特性,以遂渝高速铁路为背景,对桩板结构路基进行了动力模型试验,模型几何相似比为1:12.试验结果表明,激振1万次后,路基动力响应随振动次数的增加几乎不变;加速度响应幅值受加载频率和激振位置影响,并沿深度逐渐衰减;动应力受激振位置影响显著,而受加载频率的影响较小;桩基加深了路基的动力影响范围.Abstract: To study the dynamic performance of pile-plank embankment for high-speed ballastless track under a moving load,by taking Suiyu-Chongqing high-speed railway as the research object,a model test with a geometry scale of 1:12 was carried out.The test results indicate that after 10 000 times of vibrant loading,the dynamic response of the embankment remains constant.Amplitude of acceleration response is influenced by loading frequency and loading position and decreases with the increase of vertical depth.Dynamic stresses are affected significantly by loading position,but less affected by loading frequency.Pile structure expands the depth of the dynamic response of subgrade.
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Key words:
- high-speed railway /
- ballastless track /
- pile-plank embankment /
- model test
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蒋关鲁,詹永祥,陈睿,等.无碴轨道桩板结构路基设计理论及计算理论的探讨[C]//中国铁道学会.铁路客运专线技术交流会论文集.武汉:长江出版社,2005:398-401.[2] 詹永祥,蒋关鲁,魏永幸.无碴轨道桩板结构路基的设计及计算[C]//中国铁道学会.第二届中国交通土建工程学术交流会论文集.成都:西南交通大学出版社,2006:723-729.[3] 詹永祥,蒋关鲁,魏永幸.无碴轨道桩板结构路基在地震荷载下的动力响应分析[J].中国铁道科学,2006,27(6):22-26.ZHAN Yongxiang,JIANG Guanlu,WEI Yongxing.Dynamic response analysis on the pile-plank structure roadbed of ballastless track under earthquake load[J].China Railway Science,2006,27(6):22-26.[4] 吕西林,陈跃庆,陈波,等.结构-地基动力相互作用体系振动台模拟试验研究[J].地震工程与工程振动,2000,20(4):30-36.LÜ Xilin,CHEN Yueqing,CHEN Bo,et al.Study on dynamic similitude theory of soil-structure interaction system[J].Earthquake Engineering and Engineering Vibration,2000,20(4):30-36.[5] 凌贤长,王臣,王成,等.液化场地桩-土-桥梁结构动力相互作用振动台试验模型相似设计方法[J].岩石力学与工程学报,2004,23(3):450-456.LING Xianzhang,WANG Chen,WANG Cheng,et al.Scale modeling method of shaking table test of dynamic interaction of pile-soil-bridge structure in ground of soil liquefaction[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(3):450-456.[6] 蒋关鲁,刘先锋,张建文,等.高速铁路液化土地基加固的振动台试验研究[J].西南交通大学学报,2006,41(2):190-196.JIANG Guanlu,LIU Xianfeng,ZHANG Jianwen,et al.Shaking table test of composite foundation reinforcement of saturated silty ground for high speed railway[J].Journal of Southwest Jiaotong University,2006,41 (2):190-196.
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