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金属矿山 ›› 2007, Vol. 37 ›› Issue (11): 32-34.

• 采矿工程 • 上一篇    下一篇

移动荷载作用下边坡体动力响应测试分析

陈嘉生1,2,姜立春3   

  1. 1.中南大学;2.安徽铜陵市化工集团;3.华南理工大学
  • 出版日期:2007-11-15 发布日期:2012-02-09
  • 基金资助:

    * 国家重点基础研究发展规划项目(编号:2004CB619200)。

Test Analysis of Slope Mass Dynamic Response under Moving Load

Chen Jiasheng1,2,Jiang Lichun3   

  1. 1.Central South University;2.Anhui Tongling Chemical Group;3.South China University of Technology
  • Online:2007-11-15 Published:2012-02-09

摘要: 移动荷载是影响露天矿边坡体的稳定的一个重要原因。新桥矿边坡移动荷载测试表明,低频振动在整个频域中所占比例较大,振动低频主要分布在10~60 Hz之间;火车荷载振动的传播速度均值在0.01 m/s以下;移动荷载应力波传播距离一般在5~20 m;振动波谱高频分量被钢轨瞬时吸收,对路基和边坡的影响较小,中频低频分量通过轨道传至路基,对远场的路基和边坡体产生非稳定的激励振动,影响路基和边坡体的结构稳定。在实际工程中,进行局部加固可防止扰动区域内的砂土体液化。

关键词: 露天矿, 移动荷载, 测试

Abstract: Moving load is an important factor affecting the open-pit slope. The moving load dynamic test on Xinqiao Mine slope indicates that low frequency vibration takes a larger proportion in the whole frequency domain and the vibration low frequency mainly varies between 10 to 60Hz. The propagation velocity of train loading is below 0.01m/s on average and the propagation distance of the stress wave from moving load is generally between 5 to 20m. The high frequency component of vibration spectrum is absorbed instantly by rails, leaving small effect on both subgrade and slope; and the medium frequency component is transmitted from rails to subgrade, producing unstable excitation vibration to far-field subgrade and slope which will influence the structural stability of both subgrade and slope. In actual engineering, local reinforcement can prevent the sand soil from liquefaction in disturbed area.

Key words: Open-pit mine, Moving load, Testing