| 高速列车荷载下尾矿动力特性及坝体稳定性分析 |
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| 引用本文： | 许旭堂,;简文彬. 高速列车荷载下尾矿动力特性及坝体稳定性分析[J]. 土工基础, 2014, 0(4): 106-110 |
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| 作者姓名： | 许旭堂, 简文彬 |
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| 作者单位： | [1]福州大学岩土工程与工程地质研究所,福州350108; [2]福州大学资源与城乡建设系,福州350108 |
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| 基金项目： | 国家自然科学基金（41072232）、福建省自然科学基金（2010J01254）资助. |
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| 摘 要： | 高速列车荷载作用下尾矿库边坡的稳定与否直接影响着列车的安全运营。以福建某一尾矿库边坡为例,通过采集的尾矿材料进行动三轴和共振柱试验,得到尾粉砂和尾粉土的动力参数,并揭示了尾矿材料在不同围压下动剪切模量比(G/Gmax)和动阻尼比(λ)随动剪应变(γ)变化发展规律,定量给出相应参数的推荐值;借助实测的动力参数和高速列车加速度时程曲线,对尾矿库边坡进行液化特性和动力稳定性的定量分析评价,计算结果满足要求。该研究手段可为类似工程的安全评价提供有意义的参考。
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| 关 键 词： | 高速列车 动力参数 液化特性 动力稳定性 |
Analysis of the Stability and Dynamic Properties of Tailings Slopes under High-Speed Train Vibrations |
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| Affiliation: | XU Xutang, JIAN Wenbin (1. Institute of Geoteehnieal and Engineering Geology, Fuzhou University, Fuzhou 350108 2. Department of Resources and Urban Rural Development, Fuzhou University, Fuzhou, 350108) |
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| Abstract: | The stability of the tailing slopes under high-speed train induced vibrations is directly related to the train operation safety. This paper presents a case history of the stability of a tailing slope in Fujian. The development of dynamic shear modulus ratio （G/Gmax） and the change of the dynamic damping ratio （λ） with the dynamic shear strain （γ） under different confining pressures are obtained through the characterization of the dynamic parameters of the tailing silt other tiling soil samples with the dynamic triaxial shear tests and resonant column tests. Based on the measured vibration and the acceleration characterization of the high-speed trains, the stability and liquefaction of the tailing slopes are evaluated. The results indicate that the stability is not a concern and the liquefaction und the vibration is not likely. |
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| Keywords: | High-Speed Train Dynamic Parameters Liquefaction Properties Dynamic Stability |
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