重载铁路隧道基底结构长期动力特性试验研究

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摘要本文针对重载铁路隧道基底结构受列车荷载作用更大的特点，根据付营子隧道现场大型激振试验实现了27t轴重的重载列车动力加载和长期荷载作用，与远程实测动力数据进行比对验证了试验的客观准确性。讨论了双线重载铁路隧道基底结构在大轴重、高密度的运输环境下由上至下的道床、仰拱填充、仰拱结构和围岩表面的接触压力动力响应和长期变化。研究表明：激振试验能够很好的模拟27轴重作用下双线重载铁路隧道基底结构的动力特性，具体表现为各结构表面重载线路轨道下方相应位置的动力响应和长期效应最为明显，且由上至下随竖向深度逐渐减弱。各位置的动压力长期效应受该位置的列车动荷载附加值影响，动力响应越大，长期效应越明显。试验结果可为双线重载铁路隧道基底结构的稳定性评价和设计参数提供理论基础。

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	吴秋军1
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	李自强1
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	于丽1
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	华阳1
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	王明年1
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关键词 ：重载铁路隧道, 基底结构, 激振试验, 动力响应, 长期效应

Abstract：According to the characteristics of basement structure of heavy haul railway tunnel under train load is greater, based on Fuyingzi tunnel site large vibration test which achieved dynamic loading of 27t axle load of heavy haul train and long-term load, compared with the remote measured dynamic data，this paper proved the objectivity and accuracy of the test and discussed pressure dynamic response and long-term changes of the double line heavy haul railway tunnel basement structure that include ballast, invert filling, inverted arch structure and surface of the rock contact in the environment of the heavy axle load and high density transportation.The research shows that the vibration test can well simulate the dynamic characteristics of the basement structure of the double track heavy haul railway tunnel under the 27t axle load, the dynamic response and long-term effects in the vertical position of heavy load line on each structure are the most obvious and gradually weakened along with the vertical depth from top to bottom, long-term effect and dynamic pressure of each positon is influenced by the dynamic load of train, the greater the dynamic response, the more obvious the long-term effect. The experimental results can provide theoretical basis for stability evaluation and design parameters of the base structure of double track heavy -haul railway tunnel.

Key words： heavy-haul railway tunnel base structure vibration excitation test dynamic pressure distribution long-term effect

收稿日期: 2016-05-20 出版日期: 2017-05-15

引用本文:

吴秋军1，2，李自强1，2，于丽1，2，华阳1，2，王明年1，2. 重载铁路隧道基底结构长期动力特性试验研究[J]. 振动与冲击, 2017, 36(10): 127-133.
WU Qiu-jun1，2，LI Zi-qiang1，2，YU Li1，2，HUA Yang1，2，WANG Ming-nian1，2. Experimental Study on Long-term Dynamic Characteristics of Heavy Haul Railway Tunnel Basement Structure. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(10): 127-133.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2017/V36/I10/127

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