Causes of landslide recurrence in a loess platform with respect to hydrological processes

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• 作者：Ling Xu (1) suyu820@163.com
  Xiaojuan Qiao (23) qiaoxj@gucas.ac.cn
  Caixia Wu (1) wucaixia1024@126.com
  Javed Iqbal (14) javediqbal@ciit.net.pk
  Fuchu Dai (1) daifc@mail.iggcas.ac.cn
• 关键词：Landslide – ; Topography – ; Groundwater – ; Loess Plateau
• 刊名：Natural Hazards
• 出版年：2012
• 出版时间：November 2012
• 年：2012
• 卷：64
• 期：2
• 页码：1657-1670
• 全文大小：1.2 MB
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• 作者单位：1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029 China2. Laboratory of Computational Geodynamics, Chinese Academy of Sciences, Beijing, 100049 China3. College of Earth Sciences, Graduate University of Chinese Academy of Sciences, Beijing, 100049 China4. Department of Earth Sciences, COMSATS Institute of Information Technology, Abbottabad, Pakistan
• ISSN：1573-0840

文摘

Irrigation-induced landslide is a recurring problem in the Heifangtai loess platform of northwest China. The landslide sites are characterized by a concave topography. Numerical modeling indicates that the groundwater table at the past-landslide site rises more quickly than the other natural platform borders under irrigation conditions. This is consistent with the field observations that seepage of the groundwater appeared in the hollow is higher than that of lateral slopes. In order to investigate the response of soil behavior due to rise in groundwater table, stress-path tests were performed on undisturbed specimens. It has been observed that the increase in pore water pressure in loess can trigger soil liquefaction and eventually results in landslide. Hence, the concave past-landslide site is much more prone to landsliding, which contributed to the landslide recurrence.