郭剑, 李同录, 李萍, 蔺晓燕, 沈伟, 翟张辉. 2018: 一种考虑曲面地形效应的流动性滑坡运动模型. 工程地质学报, 26(2): 319-324. DOI: 10.13544/j.cnki.jeg.2017-479
    引用本文: 郭剑, 李同录, 李萍, 蔺晓燕, 沈伟, 翟张辉. 2018: 一种考虑曲面地形效应的流动性滑坡运动模型. 工程地质学报, 26(2): 319-324. DOI: 10.13544/j.cnki.jeg.2017-479
    GUO Jian, LI Tonglu, LI Ping, LIN Xiaoyan, SHEN Wei, ZHAI Zhanghui. 2018: A NUMERICAL MODEL FOR SIMULATION OF FLOWSLIDE ON CURVED TOPOGRAPHY. JOURNAL OF ENGINEERING GEOLOGY, 26(2): 319-324. DOI: 10.13544/j.cnki.jeg.2017-479
    Citation: GUO Jian, LI Tonglu, LI Ping, LIN Xiaoyan, SHEN Wei, ZHAI Zhanghui. 2018: A NUMERICAL MODEL FOR SIMULATION OF FLOWSLIDE ON CURVED TOPOGRAPHY. JOURNAL OF ENGINEERING GEOLOGY, 26(2): 319-324. DOI: 10.13544/j.cnki.jeg.2017-479

    一种考虑曲面地形效应的流动性滑坡运动模型

    A NUMERICAL MODEL FOR SIMULATION OF FLOWSLIDE ON CURVED TOPOGRAPHY

    • 摘要: 流动性滑坡在流经曲面地形时会产生附加的离(向)心作用,而以往的研究并未充分考虑这种作用。本文以LS_RAPID模型为基础,补充了在曲面地形下滑体运动所受离(向)心力,修正LS_RAPID模型的控制方程,得到考虑曲面地形效应的流动性滑坡运动模型——LSD_T(Landslide Dynamic_Terrain)模型。运用该模型对一典型流动性滑坡——天水市大沟滑坡进行模拟,并与相同参数下LS_RAPID模型的模拟结果进行对比。结果表明:LS_RAPID模型中曲面地形对滑体运动的限制作用不明显,体现为弯道处滑体冲出沟道,不符合滑坡的实际运动情况;而LSD_T模型则能够较好的反映弯道离(向)心作用的影响,滑体在弯道处顺沟滑动,运动轨迹与实际堆积过程基本一致。

       

      Abstract: The movement of the flowslide is complex due to the centrifugal force and centripetal force of curved topography. However, it was not fully considered in the past. Based on the LS_RAPID model, this paper puts forward a new method to calculate centrifugal force and centripetal force of flowslide mass due to surface topography. The control equations of the LS_RAPID are revised to a new model which considers the influence of surface topography, which is named as LSD_T(Landslide Dynamic_Terrain) model. This new model is used to simulate a typical flowslide-Dagou landslide in Tianshui city. The simulation result is compared with that of LS_RAPID model using the same parameters. Results show that the surface topography's effect on the movement of sliding mass is not obvious in the LS_RAPID model. The sliding mass rushes out of the channel at the corner, which is not conform to the actual movement of the flowslide. However, the LSD_T model can reflect the influence of the centripetal force from curve topography better. The sliding mass moves along the channel. The trajectory is basically consistent with the actual accumulation process.

       

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